GENERAL ELECTRICAL TECHNICAL SPECIFICATION

Transcription

1 SECTION D GENERAL ELECTRICAL TECHNICAL SPECIFICATION Project: Page D.1 Revision T

2 Table of Contents Element 60 - General Standards and Regulations Materials Installations Coordination of Engineering Services Element 61 - Mains Distribution General ESB Supply Medium Voltage Installation Switchgear Cabling Containment Earthing, Bonding and Testing Generator Installation Uninterruptible Power Supply Installation Testing and Certification Element 62 - Power Services Installation System of Wiring Outlet Installation Accessories Underfloor Power Distribution Installation Disabled Toilet Alarm Hand Dryer Installation Element 63 - Lighting Services Installation Installation Internal Lighting External Lighting Emergency Lighting Lighting Control Element 64 - Communications Services Installation Category 6 Data Installation Television Installation Door Intercom Installation Public Address Installation Project: Page D.2 Revision T

3 64.5 Audio Induction Loop Installation Disabled Refuge Intercom Installation Communication Cables Element 65 - Electromechanical Installation Installation Cabling Motive Power Installation Controls Wiring Installation Sensors and Digital Inputs Lift Installation Earthing and Bonding Radio Frequency Radiation Element 66 - (Not Used) Element 67 - (Not Used) Element 68 - Protective Services Installation Fire Protection Intruder Alarm Closed Circuit Television Installation Access Control Lightning Protection Element 69 - Project Completion and Handover Testing & Commissioning Operating & Maintenance Manuals Building Energy Rating Project: Page D.3 Revision T

4 Element 60 - General Project: Page D.4 Revision T

5 60.1 Standards and Regulations General This specification shall be read in conjunction with all relevant Irish standards and codes of practice, Irish building regulations, technical guidance documents to the Irish building regulation, ETCI National wiring rules ET 101, and all the relevant laws of the Republic of Ireland The installation shall be carried out in accordance with the latest version of the following standards and regulations, and all amendments. Code Year Title ANSI C Recommended Practice for Surge Voltages in Low- Voltage AC Power Circuits ANSI/TIA-568-C 2009 Commercial building telecommunications cabling standard set ANSI/TIA-569-B 2009 Commercial building standard for telecommunications pathways and spaces BS Wood screws (PD 5467) (AMD 1462) BS Specification for general purpose fuse links for domestic and similar purposes (primarily for use in plugs) BS A plugs, socket-outlets, adaptors and connection units. BS Specification for galvanized mild steel wire for armouring cables BS Steel plate, sheet and strip. Carbon and carbonmanganese plate, sheet and strip. General specification BS Specification for fixing accessories for building purposes. BS Specification for high-voltage busbars and busbar connections BS Specification for grommets for general purposes (rubber and rubber-like materials) BS Tubular fluorescent lamps for general lighting service BS Specification for bi-pin lamp-holders for tubular fluorescent lamps for use in circuits the declared voltage of which does not exceed 250 volts BS Vitreous enamelled steel reflectors for use with mercury electric discharge lamps (Types MB/V and MA/V) BS Vitreous enamelled steel reflectors for use with tungsten filament lamp BS Specification for straight concrete and clayware cable covers BS Specification for exit signs (internally illuminated) BS Ballasts for tubular fluorescent lamps BS Rubber insulation and sheath of electric cables BS Specification for continuously hot-dip zinc coated and iron-zinc alloy coated steel flat products: tolerances on dimensions and shape Project: Page D.5 Revision T

6 Code Year Title BS Switches for household and similar fixed-electrical installations. General requirements (+A2:2008) (incorporating corrigendum January 2007) BS Specification for colours for identification, coding and special purposes BS Specification for electric lighting fittings BS Butyl rubber insulated cables and flexible cords for electric power and lighting BS Luminaires. Particular requirements. BS Specification for steel conduit and fittings with metric threads of ISO form for electrical installations. BS Non-metallic conduits and fittings for electrical installations BS Specification for L.F. cables and wires with PVC insulation and PVC sheath for telecommunication BS Emergency lighting. BS Fire detection and fire alarm devices for dwellings. BS Specification. Two-pole and earthing-pin plugs, socket-outlets and socket-outlet adaptors BS Electric cables - Thermosetting insulated, armoured cables for voltages of 600/1000V and 1900/3300V (+A3:2008) BS Specification for general requirements for electrical accessories (AMD 9157) (AMD Corrigendum 16216) BS Quality systems BS Fire detection and alarm systems for buildings. BS Specification for photoelectric control units for road lighting BS Electric cables - PVC insulated, non-armoured cables for voltages up to and including 450/750 V, for electric power, lighting and internal wiring (AMD 14195) (AMD 15646) BS Conduits for electrical installations BS Mechanical cable glands BS Mineral insulated cables with a rated voltage not exceeding 750 V BS Electric cables - PVC insulated, armoured cables for voltages of 600/1000 V and 1900/3300 V (AMD 14197) (AMD 15650) BS Specification for performance requirements for cables required to maintain circuit integrity under fire conditions BS Electrical systems in office furniture and educational furniture. Specification BS Electric cables - Flexible cords rated up to 300/500 V, for use with appliances and equipment intended for domestic, office and similar environments (AMD 13631) (AMD 14200) (AMD Corrigendum 15407) (AMD 15651) (AMD Corrigendum 16644) BS Specification for ceiling roses BS Electric cables - Thermosetting insulated, armoured cables for voltages of 600/1000 V and 1900/3300 V, having low emission of smoke and corrosive gases when affected by fire (+A3:2008) Project: Page D.6 Revision T

7 Code Year Title BS Sound system equipment BS Specification for general requirements for luminaire supporting couplers for domestic, light industrial and commercial use BS Electric cables - Thermosetting insulated, nonarmoured cables for voltages up to and including 450/750 V, for electric power, lighting and internal wiring, and having low emission of smoke and corrosive gases when affected by fire (AMD 14201) (AMD 15653) BS Specification for current transformers BS Specification for weldable structural steels. Hot finished structural hollow sections in weather resistant steels BS Requirements for electrical installations. IEE Wiring Regulations. Seventeenth edition (Corrigendum 2008) BS Code of practice for audio-frequency induction-loop systems (AFILS) BS Specification for AC voltage-operated earth-leakage circuit breakers BS Direct acting indicating analogue electrical measuring instruments and their accessories BS EN Hot rolled products of structural steels BS EN Specification for tolerances on dimensions, shape and mass for hot rolled steel plates 3 mm thick or above BS EN Hot finished structural hollow sections of non-alloy and fine grain steels. BS EN Corrosion protection of metals. Electrodeposited coatings of zinc with supplementary treatment on iron or steel BS EN Corrosion protection of metals. Electrodeposited coatings of cadmium on iron or steel BS EN Light and lighting. Lighting of work places BS EN Lead and alloys. Lead alloy ingots for electric cable sheathing and for sleeves BS EN Copper and copper alloys. Drawn, round copper wire for the manufacture of electrical conductors BS EN Smoke alarm devices BS EN Cable trunking systems and cable ducting systems for electrical installations. BS EN Specification for conduit systems for cable management. BS EN Coaxial cables BS EN Alarm systems. CCTV surveillance systems for use in security applications. BS EN Information technology. Generic cabling systems. BS EN Multi-element metallic cables used in analogue and digital communication and control. BS EN Lead and lead alloys. Lead and lead alloy sheaths and sleeves of electric cable BS EN Equipment for use in audio and video door-entry systems Project: Page D.7 Revision T

8 Code Year Title BS EN Fire detection and fire alarm systems BS EN Information technology equipment. Radio disturbance characteristics. Limits and methods of measurement BS EN Double-capped fluorescent lamps. Performance specifications BS EN Conductors of insulated cables BS EN Mechanical structures for electronic equipment BS EN Specification for lampholders for tubular fluorescent lamps and starterholders BS EN Low-voltage switchgear and controlgear assemblies BS EN Degrees of protection provided by enclosures (IP code) (AMD 7643) (AMD 10931) BS EN Luminaires BS EN Switches for household and similar fixed-electrical installations BS EN Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V. BS EN Insulating and sheathing materials of electric and optical cables. Common test methods. BS EN Specification for circuit-breakers for overcurrent protection for household and similar installations BS EN Single-capped fluorescent lamps. Performance specifications BS EN Auxiliaries for lamps. Ballasts for discharge lamps (excluding tubular fluorescent lamps). Performance requirements BS EN Low-voltage switchgear and controlgear. BS EN Information technology equipment - Safety. BS EN Electromagnetic compatibility (EMC) BS EN Residual current operated circuit-breakers without integral overcurrent protection for household and similar used (RCCBs) BS EN Bayonet lampholders BS EN Double-capped fluorescent lamps. Safety specifications BS EN Single-capped fluorescent lamps. Safety specifications BS EN Lamp controlgear BS EN Conduit systems for cable management BS EN Uninterruptible power systems (UPS) BS EN Protection against lightning BS EN ISO Hot dip galvanized coatings on fabricated iron and steel articles. Specifications and test methods BS EN ISO Quality management systems. Fundamentals and vocabulary BS EN ISO Quality systems - Model for quality assurance in production, installation and servicing (No longer current but cited in Building Regulations) BS IEC Specification for residual current operated circuitbreakers with integral overcurrent protection for household and similar uses (RCCBs). Applicability of the general rules to RCCBs functionally dependent on line voltage Project: Page D.8 Revision T

9 Code Year Title BS ISO Quality management and quality assurance standards. EN Light and lighting. Lighting of work places. EN Cable trunking systems and cable ducting systems for electrical installations EN Uninterruptible power systems (UPS) EN Alarm systems. CCTV surveillance systems for use in security applications. EN Information technology equipment. Radio disturbance characteristics. Limits and methods of measurement EN Low-voltage switchgear and controlgear assemblies EN Degrees of protection provided by enclosures (IP Code) EN Low-voltage switchgear and controlgear EN Information technology equipment ET ETCI National Rules for Electrical Installations, 4th Edition ET 206A 2000 Procedural Guidelines for Working on Electrical Installations ET Code of Practice for the Design, Selection, and Erection of Low Voltage Switchboards for Residential Applications ET A Recommended Maintenance & Inspection Routine for Electrical Installations in Potentially Explosive Atmospheres. ET Code of Practice for the Selection and Installation of Low Voltage Generators ET Code of Practice for Public Lighting Installations in Residential Areas ET Guide to the Basic Principles of Electrical Safety ET Guide to the Selection and Use of Residual Current Devices ET Guide to the Maintenance, Inspection and Testing of Portable Equipment (Electrical Appliances and Tools) in the Workplace ET Code of Practice for the Design, Selection and Erection of Low Voltage Switchboards for Industrial/Commercial Applications ET Guide to the Selection of Electrical Apparatus for Use in Potentially Explosive Atmospheres. ET Code of Practice for Control Systems involving Programmable Electronic Products and Systems ET Good Practice Guide on the Management of Electrical Safety at Work. ICEL The ICEL Scheme of Product and Authenticated Photometric Data Registration for Emergency Lighting. Luminaires and Conversion Modules IEC Information technology - Generic cabling for customer premises Consolidated Edition 2.1 (incl. am.1) IEC Information technology - Implementation and operation of customer premises cabling IEC Current Transformers Project: Page D.9 Revision T

10 Code Year Title IEC Direct acting indicating analogue electrical measuring instruments and their accessories IEC Tungsten filament lamps for domestic and similar general lighting purposes IEC Double-capped fluorescent lamps. Performance specifications IEC Double-capped fluorescent lamps - Performance specifications IEC Hearing aids IEC Semiconductor converters - General requirements and line commutated converters IEC High pressure mercury vapour lamps IEC Low-frequency cables and wires with PVC insulation and PVC sheath IEC Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V IEC Sound system equipment IEC Low-voltage fuses IEC Mechanical structures for electronic equipment IEC Tests on electric and optical fibre cables under fire conditions IEC Low Voltage Switchgear and Control Gear Assemblies IEC Degrees of protection provided by enclosures (IP Code) IEC Connectors for electronic equipment IEC Conduits for electrical installations IEC Switches for household and similar fixed-electrical installations IEC Boxes and enclosures for electrical accessories for household and similar fixed electrical installations IEC Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V. IEC Dry-type power transformers IEC Shunt power capacitors of the self-healing type for AC systems having a rated voltage up to and including 1000 V IEC Low-voltage switchgear and controlgear IEC Electromagnetic compatibility (EMC) IEC Double-capped fluorescent lamps. Safety specifications IEC Single-capped fluorescent lamps. Safety specifications IEC Fibre optic communication subsystem basic test procedures IEC Fibre optic interconnecting devices and passive components - Basic test and measurement procedures IEC Uninterruptible power systems (UPS) IEC High-voltage switchgear and controlgear IS Monitoring centres for intruder alarm systems IS Emergency lighting Project: Page D.10 Revision T

11 Code Year Title IS Fire detection and alarm systems for buildings - system design, installation, servicing and maintenance IS EN Alarm systems - intrusion and hold-up systems IS EN Alarm systems - CCTV surveillance systems for use in security applications IS EN Information technology. Generic cabling systems. IS EN Low voltage fuses IS EN Degrees of protection provided by enclosures (IP code) IS EN Electrical accessories - circuit breakers for overcurrent protection for household and similar installations IS EN Low-voltage switchgear and controlgear IS EN Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCB's) IS EN Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBO's) IS Information technology -- Generic cabling for customer premises ISO / IEC Identification cards -- Financial transaction cards -- Magnetic stripe data content for track 3 ISO / IEC Identification cards -- Physical characteristics ISO / IEC Identification cards -- Recording technique ISO / IEC Information technology -- Identification cards -- Financial transaction cards ISO Information technology -- Implementation and operation of customer premises cabling ISO Reciprocating internal combustion engine driven alternating current generating sets ISO Quality management systems - requirements (incorporating corrigendum July 2009) ISO/IEC Information technology - Generic cabling for customer premises TGD Part A 2005 Structure TGD Part B 2006 Fire Safety TGD Part C Site Preparation and Resistance to Moisture TGD Part D 2000 Materials and Workmanship TGD Part E 2005 Sound TGD Part F 2002 Ventilation TGD Part G 2008 Hygiene: TGD Part H 2005 Drainage and Waste Water Disposal TGD Part J 2005 Heat Producing Appliances TGD Part K 2005 Stairways Ladders Ramps and Guards TGD Part L 2008 Conservation of Fuel and Energy - Buildings Other Than Dwellings TGD Part L 2008 Conservation of Fuel and Energy - Dwellings TGD Part M 2000 Access for People with Disabilities VDE Cables, wires and flexible cords for power install VDE Low voltage switchgear and controlgear VDE Residual current operated circuit-breakers Project: Page D.11 Revision T

12 The Contractor shall ensure that the latest version of each document published by the relevant authority is followed. The years listed above are for guidance only: The requirements of these documents shall be fully adhered to by the sub contractor in his execution of the sub contract works. In the event of there being any conflict between the requirements of this specification and any of the abovementioned documents, the requirements of documents shall prevail over those of this specification In the event of there being any conflict between the requirements of the abovementioned documents, they shall take precedence in the following order: a) TGD b) ET c) IS d) IS EN e) EN f) BS EN g) ISO h) IEC i) BS j) ANSI k) ANSI/TIA l) VDE The sub contractor shall, giving adequate notice before taking any particular course of action, inform the engineer of any such disagreement in the documentation and as the project progresses. Adequate notice shall never be less than one week This specification shall be read in conjunction with the relevant drawings and Bill of Quantities. In the event of there being any conflict between the drawings, specifications and Bill of Quantities the contractor shall allow for the most onerous option when submitting a tender Materials General Materials used in the Works shall comply with the specification, be new and unused and shall be manufactured wherever possible in the EU Materials shall comply with the latest Irish, European or British Standard Specifications, where stated, and where materials are offered, as alternatives for which there is no Irish, European or British Standard Specification, then the materials must comply with an equivalent known standard Where a trade name, firm or supplier is stated in the specification this shall be taken as being indicative of the required standard of design, quality, service and/or material only. Products or services of other firms may be used, provided the standard of design, quality, service and/or material is equivalent to that specified and the approval of the Engineer is first obtained in writing Where materials and/or services are described as "approved", "equal and approved" or "selected" it shall mean that the Engineer's approval shall be obtained in writing before ordering the materials and/or services and before proceeding with the work. Tender prices should include for specified materials only, unless approval has been given prior to tendering for other proposed alternatives At the time of obtaining quotations from a supplier named in the contract Project: Page D.12 Revision T

13 documents or when placing the order with a Nominated Supplier or Nominated Sub-Contractors (on the instruction of the Engineer) it shall be deemed that the Electrical Sub-Contractor has specifically ensured that the firm concerned will be able to supply the goods or services at the required time to suit the general program for the contract. This clause shall not apply in cases when no alternative service is allowable under the Contract Should a supplier, Nominated Supplier or Nominated Sub-Contractor not be able to comply with the general program dates allocated for their goods or services the Electrical Sub-Contractor must, before confirming any order, notify the Engineer immediately in writing, and no claim for additional costs or extension of time will be allowed for the period of delay resulting from failure to check dates and notify the Engineer. It is, therefore, in the Electrical Sub-Contractor's interest to place orders as soon as it is practicable, after the signing of the Contract, for Suppliers and as soon as instructed by the Engineer for Nominated Suppliers and Nominated Sub- Contractors Where a proprietary brand of material is mentioned it shall be used or supplied strictly in accordance with the manufacturer's specification or instructions The Tenderer shall include for taking down and removing from site all materials made redundant as a direct result of this contract, unless otherwise detailed All painting necessary for the protection of materials, or special colours required for this specification, shall be carried out as part of this contract. Protective paint shall be type "galvafroid" Installations General Every installation shall be installed with the utmost care and attention given to neatness - in particular neatness of surface installations shall be of paramount importance. All installations and work shall be to the satisfaction of the Engineer - only the very best workmanship shall be accepted. The Electrical Contractor shall include in their tender for providing such standards The Electrical Contractor shall in all cases use figured dimensions on the drawings in preference to scaled dimensions and large scale details shall be followed in preference to small scale The Electrical Contractor will be responsible for taking and checking all site dimensions and for setting out prior to fixing Where the position of existing services is shown on the drawings, these are to be regarded as approximate only and the Electrical Contractor shall, before commencing any work, satisfy himself as to the positions of such cables, conduits, pipes, or fittings, as to whether their depths below the surface will interfere with the works, and in which case he shall provide such slings, struts and other supports as are adequate to support and protect the cables etc Care shall be taken not to disturb or damage any cables, conduits, pipes or fittings belonging to any statutory undertaking, Local Authority or private parties, which may be laid on the site either before the work commences or during the period of the Contract or period of maintenance. Any damage to such cables, etc., shall be made good at the Electrical Contractor's own expense Non-MICS installations shall be rewireable and withdrawable to the approval of the Engineer. Project: Page D.13 Revision T

14 All main wiring, including main and sub-main cables, conduit and trunking etc., routes shall be approved by the Engineer before installation. Runs and routes shall be carefully selected such that when installed cables, conduits and trunking etc., are not likely to be damaged Cables, conduits and trunkings, etc., shall be installed in horizontal and vertical runs, diagonal routes will not be allowed (except for conduits routed through floor screeds). Final conduit and cables to switch and socket accessories, etc., shall be routed vertically from ceiling and floor locations The Tenderer shall include for supplying and installing all fixing brackets, standard or purpose made, necessary for the proper completion of the contract, including the supply and installation of any angle iron, framework, structures or brackets necessary for fixing switchgear, bus bar chambers and tap off units etc. Brackets shall be steel - of dimensions to suit their purpose and loading To avoid the possibility of inadvertently weakening load-bearing structures, a schedule of holes through load bearing structures shall be prepared by the Electrical Contractor and approved by the Engineer before commencement of work The drilling, welding to, or cutting of steel work (structural or otherwise) shall be avoided. If such drilling, welding or cutting appears essential, the Electrical Contractor must first obtain the approval of the Engineer before any such work is undertaken. In general, supports for conduit, trunking, cable tray etc., shall be fixed by an approved clip or welded to steel work in a manner approved by the Engineer Where cable or conduits, trunking, etc., pass through walls, floors, partitions or ceilings, the hole provided shall, after installation, be made good with cement or similar incombustible material to the full thickness of the wall, floor, partition or ceiling. Instructions on priming and painting areas made good as part of this contract shall be given in the Specification work - where appropriate Recessed fittings, accessories or conduit shall not be positioned "back to back" unless a minimum of 150 mm brickwork / block-work remains between fittings, conduits or accessories after chasing/cutting Accessories and fittings shall not be "second fixed" until painting has been completed A competent site based foreman/supervisor must be constantly in charge during the installation and have in their possession full copies of the specification, schedule of requirements and drawings Coordination of Engineering Services General The Electrical Sub-Contractor is responsible particularly for the detailed installation design and co-ordination with other services and structures for the entire installation All Electrical Engineering Services shall be run with due regard to the accommodation of the services, i.e. power, lighting, fire alarms, emergency lighting, data systems, security and communication services etc The Mechanical/Electrical Services Electrical Sub-Contractor shall, prior to the "first fix" phase of the works, liaise with other services contractors and the Main Contractor for the works to ensure that all mechanical and electrical services are integrated and co-coordinated to provide symmetrical and aesthetically pleasing Project: Page D.14 Revision T

15 finishes Whenever practical services, outlets, and accessories should be grouped and outlets/accessories should be aligned vertically/horizontally and at the commencement of "first fix" of the project the Mechanical/Electrical Services Electrical Sub-Contractor shall liaise with the Main Contractor for the project to invite the Clerk of Works to consider the proposed final positions of services routes, outlets and accessories Services routes, outlets and accessories shall only be finally positioned after consultation with the Clerk of Works, unless the positions of such services routes, outlets and accessories are shown with positions dimensioned on the contract drawings Engineering Services Co-ordination The Electrical Sub-Contractor is responsible particularly for: Interpretation of Engineering System Contract Drawings. Producing the drawings and information which are specified in their respective subcontract preliminaries and obtaining Engineer's comments on the drawings. Timely and adequate provision of general arrangement and installation drawings, samples, patterns and models, and setting out data, and thereafter co-ordination of the said drawings, data etc. to ensure the satisfactory placing of all Engineering Systems. Day by day co-ordination of the site setting out and the sequence of operations to comply with the design requirements of the contract drawings. Resolution of points or queries raised by the Architect or obtaining further instruction from the Architect or Project Supervisor where the point or query necessitates such reference being made. Reporting on Engineering Systems works and progress at all meetings attended by the Architect, Consulting Services Engineers or any other representative of the Employers. Ensuring the Engineering Systems are not damaged from premature installation and thereafter checking on the adequacy of measures to protect the works. Co-ordination of inspection, testing and commissioning of Engineering Systems with builder s work to avoid damage to systems and to ensure that tests and commissioning are not abortive. A fully detailed programme shall be provided in order that representative of the Employers, the Consulting Engineers, the Insurance Company can arrange to witness tests and commissioning as appropriate. Ensuring that all Engineering Systems are properly tested, proven and signed off in accordance with the sub-contract preliminaries and specifications, prior to offering them for inspection by the Employers representative(s). The charge for time incurred by the Employers representative(s) in attending abortive tests shall be made in accordance with the latest recommendation of the Institution of Engineers of Ireland. Ensuring that record drawings, instruction manuals and test certificates are properly and promptly prepared in accordance with the requirements of their respective Engineering Systems preliminaries. This includes monitoring of the ongoing preparation of record drawings throughout the contract. Project: Page D.15 Revision T

16 Co-ordination with the Works of other Contractors and attendance at meetings as may be required Design Requirements of the Electrical Sub-Contractor The Electrical Sub-Contractor shall be responsible for the final detailed design necessary to progress the Works to the final installation stage at the time of Contract completion fully in accordance with the requirements of the Tender Drawings, Specification and Sub-Contract Documentation Such detailed design and development shall be inclusive of, but not limited to, the following:- Final selection of Equipment and Components in accordance with the requirements of the Tender Drawings and Specification and to the approval of the Architect. Checking of dimensions on site and preparation of Builder s Work, Installation and Fabrication drawings. Design associated with building services including secondary supplementary steelwork, access platforms and lifting equipment for maintenance purposes including loads imposed on the structure. Design of test rigs as necessary to carry out the specified testing. Design associated with temporary works not forming part of the final installation The Electrical Sub-Contractor s responsibilities shall also include:- The provision and design of all necessary temporary facilities for commissioning, etc. Final design of power circuits serving lights and general services Advise on all fixing and supports required to be cast into the structure by others, including the co-ordination of positions; The supply and installation, including design, of all access ladders, gantries and platforms in plant rooms and risers requires to facilitate safe access and maintenance of equipment installed under this Sub-Contract; Ensuring that all materials, equipment and components used, together with methods of installation, comply with Statutory Requirements; Making all applications, giving all notices and paying all fees required by and to comply with the provisions of the Statutory Requirements; Weatherproofing and flashing to all services supplied under this Sub- Contract which penetrate external elements of the building; Fire protection to all fire-rated sections of the Works; Selection and provision of all necessary facilities required for setting-towork, commissioning and testing the completed installations; Preparation of installation and record drawings for all of the Electrical Services Drawings The Electrical Contractor shall include for producing dimensioned multi-disciplinary services layout and cross-sections for all areas of the building showing not only his plant and components but also builders work and other services relevant to or influenced by the electrical installations Meetings The Contractor shall attend Scheduled Service Progress Meetings and shall Project: Page D.16 Revision T

17 provide at an early stage the following for approval: Schedule of Builders Work Requirements Schedule of Builders Work Drawings Schedule of Service Layout Drawings and Sections Schedule of Co-ordinated Drawings and Approvals Schedule of Deliverables for Approval Schedule of Visible Fittings for Approval Lead Co-ordinator The Electrical Contractor shall be required to issue all necessary information to the lead coordinator in sufficient time to allow him carry out his function efficiently Issue of Drawings Co-ordinated drawings shall be issued in duplicate format to the Architect, Quantity Surveyor, Services Engineer, Structural Engineer, for their comments and approval, at least six calendar weeks prior to the programmed formation on-site. Coordination drawings shall be issued as For Construction only upon receipt of comments by the above mentioned Builder s Work Drawings The Electrical Contractor shall prepare, in accordance with the agreed Construction programme, complete Builders Work Drawings associated with the installation of the services as indicated on the Consulting Engineers Drawings. Builders Work Drawings shall be detailed to the extent that the Main Contractor can accurately position form and trim all openings in the structure necessary for the installation of the Electrical Services Drawing Scale & Schedule Drawings provided by the Subcontractor shall be drawn to a minimum scale (Design Team to advise). The Contractor shall submit a drawing schedule for approval by the Engineers Design Team Comments on Sub-contractor s Drawings Builders Work Drawings shall be issued in duplicate format to the Architect, Quantity Surveyor, Services Engineers and Structural Engineers for their comments, (at least three calendar weeks) prior to forming opes on site. Builders Work Drawings shall not be issued to the Main Contractor unless formally commented on by the Design Team members as indicated above. Remedials of unnecessary formed openings resulting from same shall be at the expense of the Electrical Contractor Co-ordination Costs The Contractor is deemed to have included all costs associated with co-ordination of each service and the building fabric. These costs shall be deemed to include all necessary ductwork offsets, re-routing, etc, and all pipework offsets, etc. No claims for additional costs shall be accepted after receipt of tenders Revision of Drawings The Electrical Contractor shall include for the on-going revision of co-ordination and Project: Page D.17 Revision T

18 builders work drawings for the duration of the contract. The Contractor shall include for 15 No: copies of each drawing issued during the duration of the Contract Mark Out of Opes The Subcontractor shall Mark out opes and holes on all floor and wall surfaces as required to the satisfaction of Services Engineer, Structural Engineer and Main Contractor in sufficient time to allow the Main Contractor complete his works to programme. Project: Page D.18 Revision T

19 Element 61 - Mains Distribution Project: Page D.19 Revision T

20 61.1 General Regulations, Standards and Statutory Requirements The Electrical contract shall be carried out in compliance with the following:- a) National Rules for Electrical Installations, ET101 As issued by the Electro Technical Council of Ireland (ETCI) (latest edition including Amendments). b) Code of Practice for the Design, Selection and Erection of Low Voltage Switchgear Assemblies as issued by the ETCI (latest edition including Amendments). c) Irish Standard Specifications. d) Factories (Electricity) Regulations 1972 (including amendments). e) All relevant Acts of the Oireachtas. f) Local Authority Requirements. g) Regulations for Electrical Installations as issued by the Institution of Electrical Engineers (latest edition including Amendments). h) British Standard Codes of Practice. i) SI no. 138 of 1995 Codes of Safety, Health and Welfare at Work (Construction Regulations 1995) All Materials, plant, equipment and accessories supplied shall conform with one or all of the following Specifications as appropriate: a) Irish Standards Specification. b) British Standards Specification c) I.E. Publications d) V.D.E. Specifications Voltage Bands Voltage Bands to be considered for the purposes of the Specification are as follows:- Band 1 Extra Low Voltage Not greater than 50V A.C. between phases or between phase and earth. Band 2 Low Voltage Not greater than 600V A.C. between phase and earth and 1000V between phases Segregation of Circuits There are three categories of circuits for the purpose of this Specification namely:- Category 1 Low voltage circuits, other than fire alarm. Category 2 Extra low voltage circuits, other than fire alarm circuits. Category 3 Fire Alarm circuits There are four possible arrangements for segregation: - a) Segregation by multi-compartment trunking, fire-resistant, for Category 3. b) Segregation by separate conduit/trunking for all three categories. c) All three categories in same enclosure provided that: - i) Categories 1 and 2 are insulated to the same voltage level. ii) Category 3 cables are mineral insulated type. d) Categories 1 and 2 cables in same enclosure provided that they are i) Insulated at the same voltage level. Project: Page D.20 Revision T

21 ii) Category 3 cables in separate enclosure ESB Supply General The contractor shall be responsible for all applications and approvals by the E.S.B. and shall include for all attendances and costs associated with the laying on of supply The contractor shall ascertain from the ESB that the metering arrangements are satisfactory and in accordance with their requirements and shall ensure that the ESB s involvement adheres to the Main Contractors programme The contractor shall carry out the necessary negotiations with the ESB to ensure correct programming of this work Medium Voltage Installation General The Medium-Voltage Switchgear and associated equipment shall conform to the following standards:- IEC 60694: Common Clauses for High-Voltage Switchgear/ IEC 60298: High-voltage metal enclosed switchgear and control gear IEC High-voltage A.C. Circuit Breakers. IEC A.C Switches and Earthing Switches. IEC High Voltage Switches IEC Current Transformers. IEC Voltage Transformers IEC Electrical Protection Relays Commissioning for Electricity Regulations for Medium Voltage Medium-Voltage Transformation shall be effected by means of one power transformer which shall be rated as per the particular specification Note: Factory Mutual requirements will not accept oil-filled Transformers WORKMANSHIP: All Electricians working on the M.V. section of the Sub-Contract shall be experienced in Medium Voltage Installations Medium Voltage Cabling The Medium Voltage Cabling Installation shall be carried out in three-core crosslinked polyethylene insulated, 24 kv rated screened type cable, single wire armoured and served with stranded copper conductors to BS EN 60228, BS 1069, BS 6746, and IEC Installation radii shall be as large as possible and shall, in no instance, be less than 18 times the overall cable diameter Manufacturer s recommendations shall be observed regarding ambient temperature during installation and in no case shall the installation be carried out if the ambient temperature is at or below nought degrees centigrade Connection from the M.V. Switchgear to the New Transformer shall be carried out Project: Page D.21 Revision T

22 in three-core 150sq.mm XLPE Cable Cables shall be run horizontally and vertically. Cables shall be fixed by means of claw-type cleats fixed directly to the structure at 60mm maximum centres. Where Medium Voltage cables pass through the walls or floors, a P.V.C pipe sleeve shall be provided. Where a cable passes through the structure it shall be fixed to the structure at 300mm each side of the pipe sleeve Medium Voltage Cable Terminations Where medium-voltage cables terminate at transformer and switchgear, the Contractor shall provide formed spreaders to suit the equipment and shall incorporate the following: The sheath shall be cut back from the Conductor to a distance recommended by the Cable manufacturers Stress relief cones shall be provided on each conductor in the form of an insulating body of a moulded tress cone, with the expending outer sheath cover of metal braid or conductive rubber The metal tapes shall be bonded with the lead sheath, steel wire armoured and earthed Cable lugs shall be approved to E.S.B. requirements and shall be supplied by the cable manufacturer. Cable lugs shall be soldered to the conductor terminations in accordance with the manufacturer s recommendations Alternatively to the above, terminations can be made using the heat shrinkable tubing method in accordance with the Manufacturer s recommendations The E.S.B. shall terminate their supply cables in the Consumer s switch room and the Contractor shall include for this and all attendance on the E.S.B Medium Voltage Switchgear The Medium Voltage Switchboard shall be located in the Client M.V. Switchgear room. The M.V. switchboard shall comprise of one incoming circuit breaker and two outgoing circuit breakers. They shall be indoor type, manually operated, steel clad and extendable. The circuit breakers shall be SF6 type, as ASEA Brown Boveri Safesix The medium voltage switchgear shall be provided by one of the following:- ASEA Brown Boveri Ariva (Hivar) Schneider Electric The main contacts shall not carry making or breaking current Closing shall be by charged spring system and closing trigger or button. Inserting or withdrawing a circuit breaker or switch shall trip automatically if the mechanical interlock is released Warning notices shall be fixed to access points on the switchboard, indication the possible danger. The function of each circuit breaker must be indicated by means of an engraved label screed to a front prominent position It shall be possible to padlock each circuit breaker in either the open or closed position but this shall not inhibit a tripping signal from any protective or emergency devices from opening the breaker. Project: Page D.22 Revision T

23 The switchgear construction shall satisfy the IEC publication The main incoming circuit breaker shall be equipped with inverse definite minimum time-delay relays to BS 142 on the R & T phases Each outgoing circuit breaker shall also be equipped with an additional inverse definite minimum time-delay relay connected to provide restricted earth fault protection for the circuit breaker, cable and transformer primary by means of residual current The set current from all inverse definite minimum time relays shall be adjustable in at least seven steps The current transformers shall be returned to 5 amps, with burden not less than 10 VA Provision shall be made to fit a voltage Transformer to the incomer at a future date When the switchboard has been assembled and fixed to its foundations, it shall be thoroughly cleaned and inspected A wall mounted tripping unit incorporating a 24 volt 2 Amp/Hour Nickel cadmium battery with constant charger unit, capable of maintaining the battery in condition throughout its life shall be supplied and installed as part of each switchgear. The units shall include a push button, which disconnected the charger from the battery and connects a load across the battery, which draws a current of at least One Amp The battery voltage shall be displayed at all times The switchgear shall be complete with: Phase Sequence Checking Indicator Cable Testing Rod Fault-Making Earthing Equipment The Circuit Breakers shall trip on the operation of the Bucholtz relay, temperature rise or operation of a Fireman s button Medium Voltage Transformers Medium Voltage transformers shall be three phase encapsulated winding cast resin type transformers (TX-70-1A and TX-70-1B),with natural air cooling (AN) for indoor installation The Seller will be required to design, fabricate, supply, deliver, re-assemble on site and test the transformer(s) in accordance with this specification. Any deviations from this specification must be clearly identified in writing to the buyers at the time of submitting the bid The transformers shall be close coupled by busbar to the LV switchboard to form a unit substation The Transformers shall be approved and shall comply with the Electricity Supply Board Regulations and with BS EN Nominal Voltage Highest Voltage Lowest Voltage ,750 Variable according to 20,000 21,5500 operating conditions. 38,000 41,350 Further information 110, ,000 available on request Project: Page D.23 Revision T

24 Connection group Vector reference shall be DYn Medium voltage tap changing shall be plus or minus 2.5% and plus or minus 5% by means of an externally operated off-load switch with tap indicator and padlocking facility Transformer impedance shall be 6.0 % or as per agreed Transformer specialist data The unit shall be complete with the following accessories:- Bi- Directional Rollers. Jacking Pads Lifting lugs and pulling eyes Earthing pads Conservator with oil level-gauge, filler plug plus drain plug. Drainage and Sampling valve. Silica gel breather Name and Rating Aluminium plate Imbedded Electronic Temperature Sensing Elements. HV/LV Bushings and Cable Boxes Final Colour Grey RAL The units shall be complete with the following Control and Protective Devices:- 1 protection relay D.G.P.T2 or D.M.C.R including: Gas detector/low-level indicator with one contact Over pressure contact Thermostats for alarm tripping Dial type temperature indicator. Thermometer pocket with Thermometer Pressure relief valve without contact The Contractor shall ensure that the transformer is supplied complete and fitted with cable termination boxes complete with aluminium glade plates. These shall be of adequate size to enable the incoming and outgoing cables to be terminated with ease The transformer shall be designed and manufactured in accordance with the requirements of the current edition of the following national and international standards and codes: IEC : Power Transformers IEC : Tap Changers IEC : Dry Type Power Transfomers IEC : Measurement of transformer and Reactor Sound Levels. The Safety, Health and Welfare at Work (General Application) regulations, (S.I. No. 44),Part VIII Electricity. The Irish Factories (Electricity) Regulations, Statutory Instruments S.I. No Electrical components, wiring and enclosures shall be in accordance with the standards published by the British Standards Institute, VDE and I.E.C. Publications. If the Seller s equipment deviates from these standards or codes the proposal shall define in detail these differences. Project: Page D.24 Revision T

25 The entire assembly shall be CE compliant and shall bear the CE logo Atmospheric Conditions are as follows: Ambient Temperature 35 degrees Max, 5 degrees Min (Indoors) 35 degrees Max, -10 degrees Min (Outdoors) Relative Humidity 95% Max. at 40 degrees A TN-CS system is used throughout the plant as defined by ET 101and BS Dependent on the particular application, transformers may be used to feed groups of motors. Therefore, all transformers shall be capable of withstanding infrequent restarting loads of up to 1.8 times the transformer rated current. For the purpose of this Specification, the Seller shall assume that Five (5) such restarts shall take place in succession at five second intervals Transformers shall have an operational lifetime period of not less than 25 years, when delivering rated output under the service conditions stated herein and maintained according to the Sellers recommendation Transformers shall be suitable for continuous operation at full load for at least 30,000 hours without maintenance requiring the transformer to be de-energised High Voltage Windings The conductor material used for the high voltage winding shall be either round or rectangular enamelled copper wire. The enamel coating used, which also forms the turn-to-turn insulation, must be suitable to be used for an insulation system with thermal class F. (Max. Temperature 180 degrees) The conductors must be embedded in epoxy-resin reinforced by glass-fibre providing both humidity and condensation protection Temperature sensors shall be embedded in the windings to provide warning of over-temperature. This shall operate a temperature relay having two setting, the first to operate an alarm, the second to send shunt trip the remote MV and LV circuit breakers. The winding temperature shall be shown on a digital display Low Voltage Windings The conductor material used for the low voltage winding shall be copper foil The low voltage foil-winding shall be protected and reinforced using glass-fibre fabrics that are impregnated using a resin material. The resin should bond the conductors together to form a solid block, able to resist the radial short circuit forces. The LV coil shall be protected against humidity and condensation Transformer Construction The framework, clamping arrangement and general structure of the core of each transformer shall be of a robust construction and shall be able to withstand the degree of shocks which may occur during transport, installation movement and service under normal conditions. Any unusual conditions shall be indicated in the data sheet of both the enquiry and purchase order The assembled core shall result in a rigid structure, with the clamping pressure of the press beams evenly distributed, and adjusted to minimise the noise and vibration coming from the transformer when placed into operation. The transformer base frame shall be suitable for skid mounting. Project: Page D.25 Revision T

26 The magnetic circuit shall be built using high quality, low loss, non-ageing, cold rolled, grain oriented silicone steel laminations, having excellent magnetic properties and especially designed for core use. The core laminations shall be insulated from each other with a material having high-inter-lamination insulation resistance and also capable of withstanding pressure, mechanical vibration, thermal changes and temperatures which may occur under the most severe operating conditions The joints between limbs and yoke, in the laminated magnetic circuit shall be interleaved and mitred to adapt the flux pattern to the preferred magnetic direction The core clamping frame shall be equipped with lifting lugs strong enough to enable the finished transformer to be safely lifted, complete with all accessories etc. in place Six fully rated 2-1/2% taps, two above and four below rated primary voltage, shall be provided on all power and lighting transformers. The HV coils shall have two tapping above and two tapping below the rated voltage. The tapping shall be reconnectable by bolted links, in off-circuit condition These bolted links for changing the taps shall be arranged on the same side of the transformer as the HV terminals are positioned The transformer shall be self-extinguishing in the event of fire. The material used in the construction shall not produce toxic fumes in the event of fire The primary of the transformer shall be fed by 3c185 sq. mm armoured XLPE 24kv Cable run on overhead cable trays The LV terminals (L1, L2 and L3) of the transformer shall be connected to the main incomer of the 400v switchboard by busbar to form a unit substation Provision shall be made for the future installation of a current transformer on the secondary neutral for back up earth fault protection All insulation materials used either individually or in combination with others shall be suitable for use with transformers, with an insulation system temperature of 155 degrees Enclosure The transformer and its accessories shall be adequately protected against environmental conditions and corrosion. All external metal surfaces shall be hotdipped galvanised The transformer shall be supplied in an enclosure which provides protection to IP Provision shall be made for the future installation of cooling fans to increase the continuous KVA by 20%.The transformers shall be equipped with sensing element and fan relays whether fans are specified or not The enclosure shall have an identical finish to the 400v switchboard SWBD-LV to which the transformer will be closed coupled to in order to form a unit substation Short Circuit Stress The transformer shall be capable of withstanding without damage the electromagnetic forces arising under short circuit conditions. It shall be suitable for connection to a system having a short circuit level of 250MVA. Project: Page D.26 Revision T

27 Earthing Suitable Earthing Facilities shall be provided so that the bus-bar or circuit breakermaybeshort circuited and earthed Provision may be made to lock the earthing device into position with a removable key The Contractor shall supply and install (mounted at 1.20 metres) an earthing busbar within the New Main Switch Room The Bus-Bar shall be manufactured from HDHC Copper to BS 159 and shall be of rectangular section dimensions 100mm X 16mm minimum size The Bus-Bar shall be mounted on glass, porcelain or ethylene-propylene polymer insulation spacer discs The Bus-bar shall be drilled and earth cables shall be rigidly bolted to the conductor and in addition, cable lugs shall be soldered to terminations At least five Copper Electrodes shall be provided per transformer The Electrodes shall be installed in virgin ground floor slab and may be plate or red type as required, to attain the specified earth resistance Testing The following tests shall be carried out on site. The installation shall not be deemed to be complete until a satisfactory Certificate has been obtained.:- The medium voltage Cables shall be subjected to 40kV. Direct current, increased gradually from zero to the full value and monitored for fifteen minutes. The Voltage shall be applied between each conductor and the other conductors and the armour. The switchgear phase-to phase and phase-to-earth shall be tested at 25 kv, 50Hz across contacts for one minute. The relays shall be tested by means of current injection on the secondary winding. Grading of the protection shall be agreed with the ESB Engineer. The circuit breaker tripping on Bucholz and temperature rise shall be demonstrated. The earth electrode resistance shall be measured and noted The transformer shall be fully tested in accordance with IEC and as follows: Power Frequency Test Impulse Level Temperature Rise Limits Winding 50Hz for 60 Secs 1.2/50 micro secs Primary 50kV + 125kV 85 C Secondary 50 kv + 125kV 100 C In addition, the certificate shall note the polarity and ratio of each current transformer used for protection Submittals The contractor shall submit within 4 weeks of appointment, the following information:- General arrangement & Control wiring drawings Transformer Efficiency Voltage Regulation & Damage Curves Project: Page D.27 Revision T

28 Magnetisation Curves for Neutral CT Any or all erection details required 2No. Draft copies of the Operating and Maintenance manual for approval Inspection and Test plan (with key dates) Any information issued at the quotation stage, which has been revised or amended The seller shall provide three complete sets of operating and maintenance manuals for the transformer and all of the accessories In addition to hard copies the seller shall supply in disc form the manuals in PDFand the drawing in AutoCAD Inspection & Testing Routine tests, as described in IEC 60076, shall be carried out at the Vendors works The following tests shall be subject to witnessing by the Owner/Engineer Mechanical Inspection Measurement of winding resistance s Ratio, polarity and phase relationships Impedance voltage Load losses No load losses and no load current Induced over-voltage withstand Separate source voltage withstand Insulation resistance test (5000v for MN windings & 500v for LV windings) Testing and Calibration of the winding temperature monitor Duplicate copies of test certificates and results sheets shall be enclosed in folders together with all technical information relating to the transformer and its auxiliary equipment, all drawings associated with the transformer and the equipment operating and maintenance instructions and descriptive leaflets Test Certificates shall be included with bid for the following type tests as performed on an identical transformer:- Temperature rise. Impulse voltage withstand Partial Discharge Condensation Resistance Humidity Resistance Toxicity Fire Performance Deviations Deviation from specification must be stated in writing at the quotation stage In absence of such statement, it will be assumed that the requirements of the specification are met without exception Warranty The transformer(s) including all components and accessories shall be guaranteed by the vendor against all defects arising from faults in design, material and Project: Page D.28 Revision T

29 workmanship, for a period of twelve months from the date of commissioning In the event of failure, the vendor shall bear all costs associated with the replacement or repair of the equipment supplied Switchgear General This Document shall be strictly adhered to, however, in some respects it does not fully cover all aspects of switchgear and associated components. It shall, nonetheless, be the responsibility of the panel manufacturer to ensure for a safe and satisfactory Switchboard/MCC/Distribution Centre The control panel shall be fitted with downward facing ventilation slots as required. Finely perforated steel mesh shall be welded behind the slots to prevent unwanted interference. Vermin proofing panels shall be fitted in the base of the switchboard All sections shall be labelled in 5mm high lettering engraved trifoliate for the outside. Internal labels are produced by Ptouch computer printer Equipment other than meters, selector switches, indicator lights, manual start/trip/reset push buttons and interlock switches shall not be mounted on doors. All other equipment shall be rigidly fixed within the compartments. Spring or serrated locking, washers shall be used to ensure that equipment fixings will not deteriorate due to vibration. Wiring to door mounted equipment shall be protected by heavy duty PVC flexible tubing, clipped at both ends and fitted at the hinged side of the door. An earthing conductor of 2.5 sq mm shall be included for earthing each hinged door All switches shall be fitted with suitably inscribed laminated plates. All switch operating handles shall be fixed to equipment to avoid loss of handles when doors are opened etc. Indicating lights shall have switchboard pattern, 3 watt LED lamps fitted Where provision is made for future equipment i.e. spare spaces busbars shall be fitted and drilled to serve the spaces, but the space shall be fully insulated from all live parts. All necessary support bars, drillings, tapping etc. shall be fitted so that future starter outlets can be installed on site with the minimum amount of work The switchboard/mcc shall be either partially type tested assembly (PTTA) or type tested assembly (TTA) and shall be manufactured in accordance with the ETCI Code of Practice for the Design, Selection and Erection of Low Voltage Switchgear Assemblies (ET 201) and shall comply with IEC / EN Classification and comply to a minimum degree of protection IP40 to form 1/2/3/4, as specified The phase sequence and colouring of the supply shall be L1, L2, L3 (RST) brown, black and grey. All power conductors and connections shall be arranged to follow this sequence, reading from left to right or top to bottom, when observed from the front of the control panel. Colour identification shall follow this sequence. Neutral conductors shall be coloured blue. Earth conductors shall be coloured green and yellow. All neutrals shall be sized at 200% of the phase busbars The Contractor shall ensure that at all times circuits of different mains voltage are segregated throughout the installation All Distribution Board neutrals shall be sized at 200% of the phase current capacity. Project: Page D.29 Revision T

30 The Main LV Distribution Board and each MCC (if installed) shall be provided, under this contract, with a 1 metre wide carbon fluted ribbed mat (Ibercaucho Commercial, available from CPL Ltd.) running the length of each distribution centre The Contractor shall obtain test certificates for the boards from the manufacturers to comply with the ETCI document and other standards as mentioned above and in the accompanying General Specification The Contractor shall be responsible for the supply of the following information to the Engineers for their approval before manufacture- Electrical schematic for the Main Distribution Boards, indicating ratings of all equipment to be utilised, cable sizes etc. Electrical schematic for the Sub-Distribution Boards, indicating ratings of all equipment to be utilised, cable sizes etc. Detailed plan and elevation arrangement of the Main and Sub Distribution boards, including full dimensional details The Engineer reserves the right to attend at the testing of the Main Distribution Board to witness compliance and shall be notified 3 days in advance of the test Low Voltage Switchgear Assemblies Low-Voltage Switchgear Assemblies Board shall be of sheet-steel cubicle-type construction. They shall be Factory-Built Assemblies (FBA) in strict accordance with EN 60947; IEC 60439, BSEN and as laid down by the ETCI's Code of Practice for the Switchgear Assemblies ET 201. However, Custom-Built Assemblies (CBA) are also acceptable provided the stringent requirements of the ETCI Document (i.e., calculations and clearance distances etc.) are adhered to Factory Built Assemblies - An assembly constructed in compliance with a manufacturer s recognised type of system which has been type tested by a certifying authority in accordance with IEC Custom Built Assemblies - An assembly generally complying with IEC but not type tested. Where CBAs are used the Contractor shall complete and submit to the Engineer a test certificate for the CBA Lifting Eyes shall be provided at reinforced points on top of the type tested assembly, which shall be removable. Once the lifting eyes are removed then plastic caps shall be inserted into the threaded holes Main Distribution Board The Main LV Distribution Board shall be of metal clad Form 4 Type 2, Type Tested Assembly (TTA) modular construction and shall include all necessary switch fuses and circuit breakers, as per the schematic drawings The neutral shall be sized at 200% of the phase current capacity All compartments and components shall be clearly and permanently labelled The board shall be complete with the following Surge Protection Power Factor Correction Unit Pulse output multimeter complete with ethernet connection, RS485 gateway (Mobbus TCP or JBUS/MODBUS RTU over TCPprotocal) monitoring the main incoming supply Project: Page D.30 Revision T

31 Pulse output multimeter complete with ethernet connection, RS485 gateway (Mobbus TCP or JBUS/MODBUS RTU over TCPprotocal) monitoring the supplies to each Sub Distribution Board Generator Auto Change-Over panel The contractor shall include for post installation thermal imaging of the main board at a time to be determined by the consulting engineer but within the first 12 months of Practical Completion. At this time the main earth shall be re-made and re-tested to comply with regulations Sub-Distribution Boards MCB sub-distributions boards shall be totally enclosed enamelled sheet steel Form 3B, Type Tested Assembly (TTA) modular construction type suitable for wall mounting with a minimum protection class of IP54 to ISEN and EN Each MCB board shall be provided with its own hinged lid and integral load break switch Each SDB shall comply with EN & MCBs shall comply with IEC 60947and shall be provided with un-adjustable bimetallic trip for overload protection and instantaneous electro-magnetic trip for short circuit protection Distribution boards shall incorporate 20% spare space for future circuits The Contractor shall include for the reconfiguration and addition of circuit breakers to suit revisions to the installation during the construction period The Contractor shall provide all supports and brackets necessary for the correct installation of the SDB Sub distribution boards shall have circuit identification chart in plastic holder containing the following information:- MCB No. MCB rating No. of points on circuit Cable size Location Each sub-distribution board chart shall be completed in full by the Electrical Contractor Bus-bar systems shall be continuously rated for not less than 100A and shall be certified as such All neutrals shall be sized at 200% of the phase busbars MCBs, RCBOs, and RCDs in the MCB distribution boards shall be wired to outgoing terminals by the panel manufacturer. Outgoing terminals shall be rail mounted suitably labelled/numbered and shall be in a separate compartment of the panel assembly All compartments and components shall be clearly and permanently labelled and each fuse, MCB, RCBO and RCD shall be similarly numbered for cross-referencing to the circuit charts. Circuit charts shall be stencilled or typed and shall be placed in clear plastic envelopes fixed within the panel doors. Project: Page D.31 Revision T

32 Enclosures The enclosures used shall be suitable for installation of components to give adequate space and shall be suitable for the environmental conditions of the place of installation The Protection Rating of the enclosure shall be minimum IP54 in accordance with ISEN The enclosure framework shall be of sheet steel construction, minimum of 2.5mm thickness, sprayed and stove enamelled. Doors and panels shall also be of sheet steel construction and be 1.5mm minimum thickness All insulated enclosures shall be constructed from impact-resistant glass-fibre reinforced polyester. When the enclosures are assembled to form a composite switchboard they shall be assembled in a symmetrical form and shall maintain a protection of at least IP55 in accordance with ISEN Also when grouped they shall be mounted onto an angle iron framework, rust-proofed and painted and be suitable for wall or floor mounting, as specified The internal protection rating of boards against contact with live or moving parts and against ingress of solid foreign bodies shall be not less than IP20 in accordance with ISEN The main incoming device shall be separated from the busbar section which shall be separated from the switchgear compartment by means of suitable short circuit proof barriers. The switchgear compartment shall be separated from the cable compartment by means of a dust and vermin proof barrier All compartments in the FBA shall be accessible from the front. Cubicle doors shall be hinged type with quick release catches and facility for interlocking door when relevant switch is in the on position. Doors shall be earthed to the main frame of the FBA by means of a flexible cable connection. All operating components of switchgear push buttons and instruments shall be fitted to doors and suitably labelled. Doors shall be 14 SWG with side panels 16 SWG minimum The doors of the MDB and each SDB shall be key operated to prevent unauthorised personnel from tampering with same Current ratings and short circuit fault ratings shall be as specified elsewhere in this Document Environmental Conditions Unless otherwise specified the environmental conditions to which the FBA should withstand without damage to any of its components are as follows: Ambient Air Temperature +40 C Maximum +35 C average over 24 hours -5 C minimum Relative Humidity 90% at +20 C maximum Discrimination Fuses and circuit breakers in series in a switchgear assembly shall discriminate fully against each other in the event of a fault The let-through energy of the lower rated protective shall be less that the rearcing energy of the higher rated protective device in all instances The Contractor shall be responsible for ensuring that the installed switchgear assembly affords discrimination throughout. Project: Page D.32 Revision T

33 Back-up Protection Back-up protection shall be afforded to protective devices (e.g. over-loads MCBs) which cannot safely break the maximum prospective short circuit assembly. Protection shall generally be by high breaking capacity current limiting fuses General Arrangement Circuit breakers and Switches All circuit breakers and power feeder switches shall be of the fault make and break pattern, i.e. capable of making the maximum fault current at any time without damage to the equipment or the operator Circuit breakers shall comply with BS EN and shall be of the fixed pattern, trip free type, complete with stored energy closing and tripping facilities. The stored energy shall be supplied for a hand wound spring/operating handle or equal alternative device Circuit breakers shall be suitable for continuous operation and shall be capable of handling the fault currents specified by the customer All switches shall be spring loaded, quick make and break type and it shall not be possible to draw an arc by attempting to tease the switch to the open or closed positions Circuit breakers shall be complete with arcing contacts, arc suppression shields and all equipment, such as CTs, trip units, shunt trip, coil, live terminal shrouds etc Contactors shall be suitable for easy and quick removal assembly disassembly. Coils shall be accessible for ease of replacement Feeders All switch handles shall be fixed to the equipment. Facilities shall be provided for padlocking the isolating switch in the OFF position only. Each isolation switch shall have clear ON OFF flag indication All components in a compartment shall be de-energised when the isolating switch for that compartment is in the OFF position except the following:- a) Incoming Live Terminals of fuses or isolating switch. b) Terminals of control or alarm supplies if any The terminals mentioned in a & b above shall be fully shrouded with insulating material All power feeder switches shall be of the fault make and break pattern, i.e. capable of making the maximum fault current at least three times and of breaking the maximum fault current at any time without damage to the equipment or the operator. All isolators shall be rated equal to the rating of the feeder fuse base shown on the single line diagrams Combined fuse switches K & N with NH00 base up to 160 Amp and switchfuses shall be Bremas All switches shall be spring loaded, quick make and break independent type The main contractors shall comply with IEC and be suitable for direct on line starting. They shall be of AC3 utilisation category unless otherwise specified Solid rectangular section copper busbars shall be provided in fuseboards. They shall be rigidly held in position and capable of withstanding the fault level of the particular section of the MCC where they were installed. It shall not be possible to Project: Page D.33 Revision T

34 move the busbars vertically or horizontally within their fusebases when the fuses are removed Busbars in distribution boards shall be rated to carry the total overload current of the maximum main supply fuses to the distribution board Copper busbars mounted on insulators shall be used for neutral busbars. Neutral busbars shall be exactly equal to the phase busbars and shall be fitted with one cable terminal connection for each fuse/mcb in the distribution board Each distribution board section shall be fitted with an earthing busbar exactly equal to the neutral busbar but not mounted on insulators Busbars and Busbar Connections Busbars shall be installed as per manufacturer s instructions Busbars shall be HDHC copper of uniform cross section and shall comply fully with BS 159. The busbar system shall be type tested in accordance with IEC and be capable of carrying the continuous load current as specified elsewhere in the Document Neutral Busbars shall be 200% of the cross-section as phase bus-bars unless agreed otherwise with the Engineer and the earth bus-bars shall be a minimum of half size Busbars shall be suitably supported and anchored to avoid vertical, horizontal or lateral movement. Busbar supports shall be of shockproof insulating material with adequate creepage / spacing characteristics to comply with the clearance to earth and between phase stated in the Standards to which the MCC is constructed All busbars shall be enclosed in separate air insulated compartments with inter cubicle insulation to prevent transfer of arcs between panels and shall be fully shrouded internally on all sides to prevent accidental contact Busbar interconnections and joints shall be of the overlap type with direct surface contact area equal to the width of the lesser busbar squared. Busbar joints shall be made using two (2 No.) or more cadmium plated high tensile steel bolts with two flat, one shakeproof washer and one nut, or two flat washers, one nut and one locknut Fixing bolts, studs or set screws shall not be used in any circuit as the sole means of carrying current Where the incoming supply is at the end of the busbar system, the busbar shall be rated to carry the maximum rated overload current of the incoming circuit breaker or switchfuse Where the incoming supply is at the centre of the busbar system, the busbars shall be rated to carry 75% of the maximum rated overload current of the incoming circuit breaker or switchfuse. In such cases the busbars between the circuit breaker/switchfuse and the centre busbar joints shall be fully rated at Clause 5.5 above, taking special care to have maximum surface contact between busbars at the central joint Supply connections from busbars to outgoing circuit switch fuses/circuit breakers shall be in hard drawn rectangular copper section bars for all circuits exceeding 125 Amps. Phase colour identification to be as clause Copper cable connections, suitably supported in cleats of insulating material and separated from all other live or earthed metal, fitted with compression type Project: Page D.34 Revision T

35 (crimped) cable lugs at both ends may be used for interconnections of 125 Amps rating or less. The cables shall be installed in a short circuit proof manner and all cable conductors and branch busbars shall comply with the I.E.E Regulations 16th Edition for the Electrical Equipment of Buildings Busbar Connections up to 63 Amp may be effected by means of cable, braced and supported as necessary, whereas connections above 63 Amp shall be made by Means of HDHC rectangular section copper busbar, insulated and supported as necessary The neutral busbar shall be rated at 50% of the phase busbars and it shall be fitted with neutralising link at the main ESB incoming circuit breaker or switchfuse Where busbars are drilled care should be taken to maintain ample cross sectional area in order to affect a proper joint Main Incoming Protective Device When the switchgear assembly is connected directly to the ESB supply the main incoming protective device should consist of:- a) A current limiting switch/fuse having a prospective short circuit current of 40kA at 0.2 power factor. b) A circuit breaker having a rated short circuit current of 40kA at 0.2 P.F. with a short circuit performance category P2 in accordance with IEC c) The construction of such circuit breakers shall be such that the operating mechanism and contacts can be readily inspected Air Circuit Breakers (ACBs) Air circuit breakers shall comply with the requirements of IEC 60947, BS EN and VDE They shall be totally enclosed in galvanised sheet steel and shall have an interlocking device on the door to prevent it being opened while the ACB is in the ON position Each ACB shall have adjustable overcurrent and undervoltage releases. Breaker contacts shall be silver and arc resisting alloy tipped and shall be encased in deionisation arc shutes Each ACB shall have a short circuit breaking capacity of 25m VA for 1 second unless otherwise specified Where the switch may be subject to dampness or corrosion it shall be an all insulated type to IP55 in accordance with IEC When used as a main incoming device they shall have a rated prospective short circuit current of not less than 40 ka at a power factor of 0.2, and shall be tested to P2 category IEC When used in conjunction with another ACB (i.e., for incoming generator supply), both ACBs shall be mechanically and electrically inter-locked so that only 1 No. ACB may be switched in at any given time Moulded Case Circuit Breakers (MCCBs) MCCBs shall comply with the requirements of IEC 60947, IS EN 60947, BS EN 60947and VDE Project: Page D.35 Revision T

36 Their contacts shall be capable of inspection They shall be multi-pole of the quick make and break pattern and shall have integral fixed overcurrent and magnetic release unless otherwise specified. The operating mechanism shall be a trip free, toggle mechanism and visible on/off and trip indication MCCBs shall be enclosed in a galvanised sheet steel or all insulated enclosure as specified elsewhere Miniature Circuit Breakers (MCBs) MCBs shall comply with IS EN AND BS EN as appropriate MCBs shall be type B, C, D to IS EN to the following table:- Type Instantaneous Trip Current Application B 5 x IN Resistive Loads C 10 x IN Discharge Lighting, Small Motors etc, D 20 x IN Large Inductive Loads, Large Motors, Welding Plant etc, MCBs shall incorporate both thermal overload protection by means of bi-metallic strips and short circuit protection by means of electro-magnetic solenoid MCBs shall have a trip free operating mechanism with visual on/off indication. Contacts shall be of the silver tungsten or silver graphite equipment complete with a deionising arching chamber and the whole enclosed in a moulded case, suitable for DIN rail fixing, or screw mounting as appropriate Where the prospective short circuit current exceeds the breaking capacity of the MCB, back up protection by means of fuses shall be provided in accordance with Manufacturer's Recommendations Where possible MCBs shall be of plug-in type, to allow replacement without undue difficulty Residual Current Circuit Breakers (RCDs) Unless otherwise specified RCDs shall be of the residual current operating type and comply with BS IEC 1008, VDE 0664 and ET 214 as appropriate. Voltage operated ELCBs shall comply with BS RCBOs shall conform to ISEN RCCBs shall conform to ISEN RCDs shall incorporate a toroidal transformer for sensing earth leakage, a magnetically operating tripping mechanism, silver tipped contacts, a test facility and the whole enclosed in a non-tracking moulded case suitable for DIN rail fixing or separately mounted in an enclosure RCDs shall also have a trip free operating mechanism with visual on/off indication Unless otherwise specified ELCBs shall be designed to trip to currents of 30 milli amps, in two pole or four pole versions as required Switches shall be fault make load break with quick acting make and break contacts. All switches shall have a utilisation category switch AC23. The operating handle Project: Page D.36 Revision T

37 shall have a facility for padlocking in the off position and shall be visibly labelled On/Off Earth Leakage Circuit Breakers (ELCBs) ELCBs shall be of the current operated type complying, with BS IEC They shall have a trip current rating of 30mA unless specified otherwise, and shall have a short circuit current rating of not less than (25 Amp - 1.5kA) (40 Amp - 1.5kA) (63 Amp - 2.0kA) Load Break Switches Load Break Switches shall be of the Rotary Air Break type and shall comply fully with IEC Their prospective short circuit current rating shall be adequate for their duty. (For guidance see below) They shall have on/off indication and be complete with door interlock to prevent inadvertent contact with live parts and must be lockable in the off position. Switch Current Rating (Rated Current) Up to 63 Amp Up to 100 Amp Up to 160 Amp Up to 250 Amp Up to 400 Amp Symmetrical Withstand Current (RMS 1s) 2.5kA 4.0kA 9.0kA 13.0kA 13.0kA Fuses Fuses shall be NH type in accordance with IEC and IS EN Current Type Up to 25 Amp DZII type to VDE0635 or BS88 From 25Amp to 35 Amp DZII type to VDE0635 or BS88 35 Amp and Above NH type to VDE0636 or BS Contactors Contactors shall comply with BS EN 60947, VDE 0660 and/or IEC 60947, as appropriate Unless otherwise specified all contactors shall have a utilisation category AC3. they shall be suitable for operation on 220V A.C and shall incorporate 3 or 4 pole silver tipped contacts which are removable for inspection, be suitable for adding on auxiliary contacts, have cable terminal screws with captive cable clamps, shall have at least 1 N/O and 1 N/C spare auxiliary contacts and the whole housed in a non tracking enclosure suitable for DIN rail or screw fixing as appropriate The contactors shall be full time rated, shall not overheat and be free from magnetic hum or chatter during operation Overload Relays Overload relays shall comply with BS EN 60947, VDE 0660 and/or IEC as Project: Page D.37 Revision T

38 appropriate They shall be compatible with contactors ànd starters. They shall incorporate adjustable thermal elements for normal operation but where heavy starting currents are concerned saturable core current transformer protection is required. Overload relays shall incorporate a stop/reset button which when pressed will reset a tripped overload and open circuit the normally closed control contact. The mechanism shall be trip free in operation Current Transformers (CT) Current transformers shall comply with BS 7626, and/or IEC 185 as appropriate Current transformers shall be capable of withstanding the effects of short circuit currents The rated burden (VA) of CTs shall be greater than the sum of the burdens of connecting instruments and they should have the same accuracy class as the instruments connected to it. Provision shall be made for shorting the secondary side of CTs in the event of instruments being disconnected Motor Starters Starters shall comply fully with BS EN 60947, VDE 0660 and/or IEC as appropriate They shall incorporate the following protection features: Thermally delayed over-current release on all poles set to trip at 120% full load in two hours and incorporating temperature compensation. Positive protection against single phasing in the form of an extra differential tripping bar or similar approved device. Manual re-set with protection against premature re-closing Power Factor Correction System Installation The Power Factor shall be sensed at low tension by means of CT s in the Distribution Centre/ Control Panel A control cable shall be installed from the CT S to a Step Controller which shall switch in banks of capacitors as required Each capacitor element shall be fitted with individual resistors for added safety to ensure safe discharge of capacitors in accordance with IEC 831 Part The power factor correction bank shall be supplied with a de-tuning reactor Instruments Instruments shall comply with BS 89 and IEC as appropriate. They shall be of the moving iron type for ammeters and voltmeters, induction type for watt meters etc. Unless otherwise specified instruments shall have class index of 1.5 be suitable for use on AC and be insulation tested to 2KV Instruments for use with transformers shall be such that full scale deflection can be achieved with the transformer ratio Voltmeters shall be designed to comply with IEC Voltmeters shall be fused as shown on single line diagram Multi meter as shown on single line diagram Project: Page D.38 Revision T

39 Ammeters shall be designed to comply with IEC Ammeters shall be shown on single line diagram Power factor meter shall be as shown on single line diagram Push Buttons and Control Switches Push Buttons shall be in accordance with IEC337 and IEC and have a protection rating of IP They shall be colour coded as follows:- Start/On -Green Stop/Off -Red Reset -Yellow/Black Pilot Lights and Indicators Pilot Lights shall be in accordance with IEC337 and IEC and have a protection rating of IP Their maximum Voltage shall be 230V Volt but where possible they shall be of either 110 Volt or 24Volt, as specified Neon indicators shall not be used. Pilot lights shall either be of Transformer type or Series Resistor type Time Switches Time Switches shall be seven day, twenty-four hour type, complete with day omission and thirty-six hour spring reserve Internal Cabling/Wiring All internal cabling/wiring shall be as previously described and all control/alarm wiring. The numbering and identification of all wiring shall be agreed with the Engineers prior to the completion of final manufacturer s drawings for approval All internal cabling/wiring shall be 600/1000 volt grade, LS0H insulated Extreme care shall be taken to protect short lengths of internal wiring, not protected by fuses due to their function. These short lengths of cabling shall be run separately in tubes of insulated materials to avoid damage to other components under fault conditions All internal cabling/wiring not protected by fuses shall be terminated using compression type (crimped) lugs and the complete surface contact area of the lugs shall be in contact with the termination. The maximum number of wires connected to any terminal shall be 2 No All internal cabling/wiring protected by fuses, i.e. control, metering, alarm and interconnection cables, shall be grounded in either PVC trunking or loomed by lacing with PVC string or stud tape. All such wiring and wiring from auxiliary contacts etc. shall be run to outgoing terminal racks All cables shall be in continuous lengths, joints are not acceptable. Where possible, access shall be provided for outgoing cables to be connected directly to their supply switch fuse or isolator terminals All cabling and wiring shall comply with the IEE Regulations 16 th Edition. Minimum CSA for power wiring 2.5 sq. mm Project: Page D.39 Revision T

40 Minimum CSA for control/alarm wiring 0.75 sq. mm Suitable access and removable gland plates shall be provided for all cables of the types detailed on single line distribution drawing. Adequate space shall be provided for the spreading of cores and clearance for fitting crimped type lugs to the cables, terminal boxes shall be provided, if necessary, for core spreading and for cables connected in parallel. All metering and interconnection control wiring, shall be contained in PVC cable trunking or conduits within the main access ways All cable glands will be provided by the supplier of the cables. Crimp type lugs for external cables shall be provided by the supplier of the cables Screw type compression terminals shall be fitted on terminal rails and supplied for termination of all control and alarm cables Outgoing cable connections shall be segregated in such a manner that circuits/cables may be added or disconnected without the operator being exposed to any live parts of the other circuits. This may be achieved by the compartmenting or by using neoprene terminal shrouds Earthing of Metalwork The earth busbar shall be at least 25mm x 25mm copper bar and it shall be continuous along the full length of the control panel at the top. It shall be connected to the panel frame using, a 10m plated steel stud which will protrude through the rear cover and into the panel, thereby, providing earthing terminal. All fixed and moving metal other than live and neutral busbars/connections shall be solidly connected to the earth busbar. The resistance to the earth busbar of any such part or component shall not exceed 0.5 ohms Labelling All equipment and components shall be labelled with black on white trafolyte label screwed fixed to the panels Lettering shall be 6mm high for main components and 3mm high for control devices, indicators, etc Where components are wired to a terminal rail in an FBA they shall be labelled and cross referenced with the corresponding number on the terminal Warning labels shall be red on white trafolyte type and similar in all other respects to the above Testing, Commissioning and Certification The Engineer shall be notified when the Switchboard is completely assembled and ready for inspection and witnessing of tests at the manufacturer s work FBAs and CBAs shall be tested and certified in accordance with requirements of the ETCI Code of Practice for FBAs A type test certificate shall be provided for the Engineer s approval where an FBA is required Routine tests shall be carried out on all FBAs and CBAs before they are transported from the place of manufacture and witnessed by the Engineer A dielectric test of between 1kV and 2.5kV AC RMS for 1 minute shall be applied to all poles and earth of the FBA by the manufacturer upon installation by the contractor, and witnessed by the Engineer. Project: Page D.40 Revision T

41 61.5 Cabling Installation of Cables Cables shall be installed in continuous unbroken length point to point. Under no circumstances will cable joints be allowed unless with the express permission of the engineer All cables shall be protected against mechanical damage. Non-sheathed cables shall be protected by enclosure in trunking and/or conduit. Sheathed cables shall be run and clipped so as to obviate the risk of damage in normal operation PVC insulated cables shall not be installed in locations where the ambient temperature is 0 C and lower or 65 and higher The internal radius of installed cables shall not be less that the following:- PVC insulated cables 3D Armoured cables 8D Aluminium sheathed cables 15D Mineral insulated copper sheathed cables 6D (where D is the outer diameter of the cable) Sheathed and armoured cables shall be supported by approved proprietary cleats where surface fixed and the support spacing shall not exceed the following Sheathed Cables 20D Armoured Cables 30D (where D is the outer diameter of the cable) Cables shall not be buried in walls, floors or ceiling spaces unless they are enclosed in conduit or trunking or are suitably protected against corrosion and mechanical damage. Buried cables shall always be run either horizontally or vertically Where cables cross through floors, walls etc., the hole shall be made good with cement or other suitable fire resisting material Cables shall be terminated in accordance with the manufacturer s instructions. Insulation of cable cores shall be brought up to the point of termination. All cores connected to proprietary terminal blocks shall be numbered using PVC sleeve numbers corresponding to the terminal number. Glanding of armoured cables shall be carried out such that earth continuity shall be retained between the cable and armour, gland and connected equipment. Where all insulated equipment is used the cable gland shall be complete with copper earthing tag which shall be electrically connected to an earth stud Cables buried in trenches shall be at least 600mm below finished surface levels generally and at least 750mm below road levels and protected by PVC pipes under roads Cables shall be laid on a flat bed of 50mm sand and covered with 50mm sand before backfilling. Cable warning tape shall in all instances be laid approximately 300 mm below finished surface level. Interlocking cable warning covers complying with BS 2484 shall be laid as required by the Engineer. Cables entering a building shall be suitably sealed to prevent the ingress of moisture, gas etc. Where cables may become subject to mechanical damage they shall be protected to a minimum of 450mm above floor level by conduit/trunking or other suitable protection. Project: Page D.41 Revision T

42 Cables in trenches shall be segregated from other services by the minimum distances given below:- Low voltge and extra low voltage Medium voltage and low voltage Medium voltage and extra low voltage Cables (MV LV ELV) and piped services (gas, water) 450mm 300mm 600mm 300mm Where the separation distances specified above are not feasible the Contractor shall obtain approval from the Engineer on the proposed method of segregation Sub-Main Distribution Cables All sub-main distribution cables linking the main switchboard to the distribution centres shall be PVC sheathed steel wire armoured PVC insulated cables with copper conductors 600/1000 volt grades, XLPE-insulated LSF Bedding and oversheath: steel wire armoured stranded copper conductor to BS Final sub circuit cables unless otherwise stated shall be 450/750 volt grade, PVC insulated stranded copper type in accordance with BS 6004, to run in conduit and or trunking as set down and described elsewhere All cables shall be colour coded Brown, Blackand Gray.In all cases a separate earth continuity conductor shall be run with each circuit and shall be coloured green/yellow Cables of different voltages shall be segregated at all times Sub-main cables shall be generally run along the routes as indicated on the drawings carried on cable tray with separate earth cable. Cables shall be unjoined throughout their length Underground Cables All cables laid in trenches provided by the Main Contractor shall be covered in sand with cable marking tape provided by Electrical Contractor. The latter shall supervise all trench re-instatement to ensure proper backfilling in accordance with good practice Electrical contractor shall provide galvanised pipes to a height of 25m to protect rising cables from any mechanical damage. Cables shall be run in a bracket clipped to side walls Voltage Drop The Electrical Contractor shall ensure that the size of every cable conductor shall be such that the drop in voltage from the origin of the installation to any point in the installation does not exceed 2.5% of the nominal voltage when the conductors are carrying the full load current, but disregarding starting conditions The contractor shall liaise closely with the Mechanical Contractor throughout the installation, but especially in the ceiling area where there is a concentration of services, all as indicated on drawings PVC Insulated Cables Cables for drawing-in to conduit or for laying in trunking shall be single core tinned Project: Page D.42 Revision T

43 high conductivity copper, PVC insulated 300/500 V grade to BS Black covering shall be supplied on all neutral cables with Brown, Black and Gray coverings on all phase wires including strapping wired No Cable shall be drawn into conduits until the complete conduit installation and boxes are fixed and until the plastering is finished and passed by the Engineer as sufficiently dry. No pull greater than 15kg is to be exerted when drawing in cables and talc powder shall be plentifully used to give as easy a draw in as possible Except where specifically approved by the Engineer, separate services are to be installed in separate conduit and trunking installations. The phase and neutral wire feeding particular circuits shall be run in the same conduit Final sub-circuits shall not run in the same conduit or trunking as main or sub-main circuits. Main circuits shall not run in the same conduit as sub-main circuits. Circuits of different voltages (phase to Neutral) shall not be run in the same conduit and circuits carrying Alternating Current (AC) supplies shall not be run in the same conduit with DC supplies Each circuit shall be bound separately with binding tape at intervals of not more than 3m along the complete length of a trunking installation. Identification tags shall be provided for all cables at the same intervals and shall indicate the distribution board, switches etc., to which the circuit is connected PVC insulated cables installed in trunking should be arranged so that cables approximately equal to each other in size are run together. No cable of more than four sizes larger or smaller that a parallel cable may be run in the same trunking without the specific approval of the Engineer Mineral Insulate Copper Sheathed Cables (MICS) Mineral insulated copper sheath (MICS) cable shall be 600 volt (light dudy) or 1000 volt (heavy duty) to BS 6207, Part 1. The duty category shall be as specified in part 3 of this Specification. Conductor shall be of a single strand high conductivity annealed copper insulated with highly compressed mineral substance and sheathed with a solid drawn tube of annealed copper, with an overall sheath of PVC Cables shall terminate using brass glands with cold type seals and neoprene insulation sleeves or tails with coloured sleeves for phases and switch wires and blue for neutral. Special care shall be taken to ensure that the mineral insulation has been fully removed from the conductors and the copper surface left clean before applying the sealing compound. Glands shall be of the ring type At all fittings, switches, plugs or other similar positions, standard B.E.S.A galvanised boxes shall be used to which shall be fitted the Makers standard sealing glands. The whole of the sheathing of the cable system shall be electrically continuous across all joints and shall be fully earthed Protodur Cables (NYM-J) Protodur cables shall be constructed in accordance with VDE 0250 and designated type NYM-J. the conductors of soft drawn copper ( up to 10 sq mm) are PVC insulated with an overall tough sheath of Protodur, 300/500 volt grade All cables contain an earth conductor coloured Green/Yellow. Phase conductors are colour coded in accordance with VDE specifications Protodur cables are suitable for surface installation in normal, wet or damp Project: Page D.43 Revision T

44 locations and for direct burial in walls but not for installation underground. Protodur cables shall not be installed where the ambient temperature is likely to exceed 25 C or drop below 0 C Flexible Cords Flexible cords shall have a PVC insulated copper conductors with over sheath of the 300/500V grade complying with the BS They shall be twin, three, four or five core as required. Cores shall be colour coded as follows:- Green/Yellow (earth) Brown GrayBlack (4 core type) With an additional Blue core on 5 core types Flexible cords shall be installed where the ambient temperature is likely to exceed 55 C. Heat resistant PVC insulated flexible cords shall be installed where the ambient temperature is likely to reach 70 C (eg boiler house generally) PVC PVC SWA PVC Cables PVC insulated, PVC sheathed, steel wire armoured and covered PVC cable shall be 600/100 volt grade. Cable cores shall be high conductivity copper to BS EN They shall be insulated and sheathed with PVC to IEC 60227, protected with galvanised steel wire armour to BS 1442 and sheathed with an outer covering of PVC to IEC 60227and the whole complying with BS Cables shall be terminated by means of compression glands complying with BS Compression seals are to be used to protect the cable armour and sheathing in damp or high humidity areas. Compression type glands shall incorporate an earth bonding terminal. Under no circumstances should armouring be exposed at the compression gland XLPE PVC SWA PVC Cables Cables shall be of H.C.copper conductors to BS EN 60228, cross linked polyethylene (XPLE) insulated served with and extruded PVC Bedding, single wire armoured and PVC over sheathed, the whole complying with BS Cables shall be terminated by means of compression glands complying with BS Compression seals are to be used to protect the cable armour and sheath in damp or wet locations with the gland covered by a PVC Shroud Cables are suitable for installation in ambient air temperature of 60 C and ambient underground temperature of 45 C EPR Insulated Cables EPR (Ethylene Propylene Rubber) insulated cables shall be 600/100 V grade with H.C. copper conductors to BS EN and EPR insulation to BS EPR Cables are suitable for installation in ambient temperatures up to 85 C Flexible cords for use up to 85 C shall have copper conductors with EPR insulation and CSP sheath and the whole complying with BS Silicone Rubber Insulated Cables Silicone rubber insulated cables shall be 300/500 V grade with H.C. Copper conductor and have and overall glass fibre braid. Cables shall comply with BS 6500 and shall be suitable for operation in ambient temperature of 145 C Project: Page D.44 Revision T

45 Instrumentation Cables Instrumentation cables shall be 60/120 V grade with plain annealed stranded copper conductors to BS EN Insulation and bedding shall be polythene to BS EN or PVC IEC 60227, armouring steel wire to BS 1442, or lead sheath to BS EN and BS EN 12548, and the whole sheathed with PVC to IEC as appropriate, Cables shall comply with BS EN with multi core cables numbered along its length and multi pair cables colour coded to relevant BS Specification. Cables for installation underground shall be of lead sheathed type only. Instrument cables specified above shall be suitable for operation in an ambient air temperature up to 70 degrees Celsius (70 C) 61.6 Containment General All containment shall be installed in accordance with the following standards as appropriate: BS EN BS EN BS 4568 BS 4607 BS Cable tray/ladder shall be supported so that the maximum deflection at mid span when fully loaded, does not exceed 10 mm. Notwithstanding the above the spacing between supports shall not exceed 1200 mm. Additional supports shall be provided within 225 mm of each bend, tee, or crossover. The type of supports to be used shall be as follows: Suspended cable tray/ladder shall be supported using minimum P1000 Unistrut suspended on M10 threaded rod from the roof steelwork or slab (Trapeze type supports). Where necessary additional Unistruts spanning between the structural steelwork shall be provided by the Contractor. All fixings to structural steelwork shall be by means of proprietary clamps. Vertical runs shall be fixed to Unistrut supports fixed to the wall using steel expansion bolts approved by the Manufacturer for the loads involved. Drops to equipment except where they occur along a wall shall be fixed to a Unistrut support frame rigidly fixed at the top and bottom Approved expansion fittings shall be provided on all cable tray/ladder where it crosses building expansion joints. Flexible tin plated braided copper earth straps shall be provided across all expansion fittings. Building expansion joints shall be as indicated on the Structural Engineer's drawings Fire barriers shall be provided where cable tray/ladder passes through floors or fire walls. They shall be of the volume expansion silicon foam type and shall be applied after all cables have been installed. Fire walls shall be as indicated on the Architect's drawings Substantial copper earth links shall be provided across all joints. The cable tray/ladder shall be bonded to the appropriate switchgear earth Cable Trunking The sub-contractor shall include for all cable trunking as indicated on the drawings. Cable trunking shall accommodate medium voltage sub-main and sub-circuit Project: Page D.45 Revision T

46 cables. The trunking shall be two-compartment to allow for low voltage services other than fire alarms where a separate and independent conduit system must be used. The sub-contractor shall ensure that the number of cables installed should be such that the resulting space factor does not exceed 45% and that no damage is caused to the cables or to the enclosure during their installation Note: Not withstanding the provision of earth bond links, where conduit of trunking continuous for Distribution Board to outlet, a separate protective conductor (earth continuity conductor) shall be provided for each circuit enclosed in part or whole by trunking, which protective conductor shall be looped to every outlet on the circuit Trunking, Cable Tray, Cable BDSUET and Conduit Trunking and associated fittings mounted inside a building shall be of steel sheet complying with BS EN 50085, zinc coated, and finished with a coat of paint, stove dried and hardened Trunking and fitting mounted outside a building, or run in floor trenches subject to continual dampness or accidental flooding, shall be of continuously hot dipped galvanised plain steel sheet complying with BS 2989 Group 2 class F. They shall be designed to be weather proof and shall be supplied in the as manufactured condition. They shall have external fixing lugs The thickness of material to be used in the formation of trunking and fittings shall be not less than specified in Table Trunking and fittings shall have removable lids extending over their entire lengths. The lids shall be of the same material, thickness of sheet and finish as that of the trunking Metal partitions in trunking and fittings shall be provided as indicated or as directed by the Engineers or as required by I.E.E. regulations. They shall be of the same material and finish as those of the trunking and shall be of thickness as that of the trunking Fixing screws for lids shall be of 2BA and may be brass or steel cadmium plated to comply with B.B. 3382, Part 1 and shall engage not less than 1.5 full threads of the tapped hold in the metal of the trunking All trunking shall be run neatly and be either truly vertical, horizontal or parallel with the features of the building Trunking runs shall be determined by the Contractor after agreement with the Engineers and other contractors prior to first fixing. The Contractor shall allow for routing the trunking around all columns, beams and other architectural features. The Contractor shall include for all bends, risers etc A minimum clearance of 150 mm is required from mechanical services Only the manufacturer s standard fittings shall be used including all bends, tees, reducers etc If, due to site restrictions, sections of trunking are to be fabricated, then they shall be prepared and finished to the same standard as the manufacturer s items. Prior approval for such items must be obtained from the Engineers The wiring capacity of all trunking shall be determined from the standard tables issued by the manufacturer of the trunking The Contractor shall allow 45% spare capacity in sizing the trunking Trunking systems erected outside the building shall be weatherproof. Project: Page D.46 Revision T

47 Standard manufacturer s couplings shall be used to terminate/join sections of trunking. Cut and bent trunking to form a flange will not be accepted Connections between trunking and electrical apparatus shall be by standard galvanised conduit or flexible conduit provided with screwed coupler and bush or standard flanged coupling Direct connection of trunking to electrical apparatus will only be permitted if cable entries are provided with smooth bore bushes or grommets. The return edge of the lid must be left intact Grommets shall comply with BS Installation of Steel Trunking Unless specified otherwise the minimum gauge of metal to be used shall be 1.2mm for trunking up to 75x75 and 1.6 for larger sizes Trunking shall be supplied in 3m (nominal) lengths with inturned flanges for cover fixing and increased strength and rigidity, Covers shall be supplied in 1.5m (nominal) lengths and of equal CSA to the trunking. Covers shall be held by means of quick release fasteners Where trunking is fixed upside down on the horizontal cable retaining clips shall be installed at 1000 mm intervals Where vertical runs of trunking exceed 300mm in length, proprietary PVC coated steel cable retaining pins shall be installed around which cables shall be effectively harnessed Trunking lengths shall be coupled using galvanised steel couplers of equal gauge to the trunking together with a copper earth strap fixed outside the trunking. Coupling bolts and nuts shall be M6 pan head cadmium plated with the bolt heads fixed on the inner surface of the trunking Trunking fittings i.e. bends, tees, reducers etc. shall be of the same manufacturer as the trunking and each joint made in the trunking shall be bridged by a copper earth strap. Cables in trunking shall not occupy more than 40% of the cross sectional area of the trunking and trunking shall be sized in accordance with Appendix 12 of the IEE regulations, 15th edition The whole of the trunking installation shall be run in a neat and workman like manner, which should be mechanically and electrically continuous throughout. The trunking installation should be completely erected before any cables are drawn in Trunking shall be fixed at not greater than 1200 mm centres by means of proprietary trunking brackets and M8 cadmium plated bolts, nuts and washers When trunking passes through walls the hole shall be made good with cement or other suitable fire resisting material and fire barriers of glass wool or other suitable material shall be packed into the trunking and held compressed in position by means of proprietary retaining plate or trunking lid Cable Ladders Cable ladder shall be of the heavy duty pattern with rigid sides and return flanges, manufactured from hot dip galvanised sheet steel. Perforated rungs shall be provided at 400 mm centres along the run. It shall be provided complete with all necessary bends, tees, risers, crossovers etc. provided by the manufacturer Each length of cable ladder shall be provided with a heavy duty galvanised steel Project: Page D.47 Revision T

48 jointing piece Skirting Trunking Skirting trunking shall be manufactured 1.2mm zinc coated mild steel and supplied in 2000 mm lengths. The nominal dimensions of the skirting trunking shall be 150mm high by 40mm deep. Trunking finish shall be dark admiralty grey to BS 381C colour 632, unless otherwise specified Joints between trunking lengths shall be made with proprietary butt connectors, straight through or inside/outside right angles as appropriate, with each joint electrically bonded by means of copper earth straps Skirting trunking shall be two compartments with a small compartment at the top for communication wiring and the lower larger compartment for general service socket installation. Where socket outlets are installed on the skirting trunking, pre-punched socket plates shall be installed and effectively screw-fixed to the trunking Proprietary transitions units shall be used where skirting trunking is connected to under-floor trunking (e.g where skirting trunking traverses a door opening) Bench Trunking Bench trunking shall be manufactured from 1.5mm zinc coated mild steel and supplied in 2000 mm lengths. Covers shall be a 2mm gauge and shall overlap bench trunking. Nominal dimensions of right angles shall be 90x90 mm. Trunking finish shall be dark admiralty grey to BS 381 colour C Joints between trunking lengths shall be made with Proprietary butt connectors and each joint bonded by means of a copper earth strap Socket outlets shall be installed using proprietary pre-punched plate screws fixed to the trunking Flush Floor Trunking Flush floor trunking shall be single or multi compartment as specified elsewhere and be manufactured from 1.6mm zinc coated mild steel and supplied in 2000 mm lengths Trunking covers shall be one of the following which shall be specified as appropriate in Section D:- a) 3mm Zinc coated mild steel fixed by means of countersunk screws. b) 6.35 steel with anti-skid chequer plate pattern fixed by means of countersunk screws. c) 3mm zinc coated mild steel recessed into trunking to allow floor covering to be laid on trunking lid. Depth of recess to be specified elsewhere All above trunking covers are to be fitted with a neoprene cork gasket to prevent the ingress of dust etc Trunking joints shall be as described in C 9.3 above Trunking inspection boxes and service outlet boxes shall be manufactured from similar material to the trunking. Where multi- compartment trunking is used boxes shall retain the segregation in all directions Service outlet boxes shall have provision for 4 outlets fixed to a pre-punched accessory mounting plate on 4 adjustable screws. Accessories for use with flush floor trunking shall be complete with hinged sprung covers. Project: Page D.48 Revision T

49 Where flush floor trunking joints cable or skirting trunking, proprietary bell mouth accessories shall be used, with each joint effectively earthed as described in C Under floor Trunking Under floor trunking shall be manufactured from 1.6mm zinc coated mild steel with base plate welded up body to form a single unit Trunking shall be sized as follows depending on compartmentation:- Single compartment 75mm wide Twin compartment 150mm wide Triple compartment 225mm wide Trunking shall be supplied in 2000mm lengths and finished dark admiralty grey to BS 381C colour C Trunking inspection boxes and service outlet boxes shall be manufactured from 1.6mm zinc coated sheet steel complete with cast aluminium frame with recess for the installation of floor covering. Depth of recess specified elsewhere. Frames shall have 4 adjustable screws for aligning with floor level. Service outlet boxes shall have a hinged cover with retractable lifting handle and have provision for installation of 4 accessories on pre-punched accessory mounting plate Full segregation of services shall be retained in the service outlet box in all directions Where floor pedestal outlet boxes are installed they shall be manufactured from zinc coated mild steel and be fitted with 1 ½ conduit thread screwed spouts fixed to duct outlets in floor trunking Lighting Trunking Lighting trunking shall be of similar manufacture to cable trunking except that it shall have a returned lip suitable for the suspension of luminaries. Lighting trunking shall be installed with lighting adapters comprising 20mm bushing, inside clamp, outside clamp and 20mm hexagonal locknuts, cable retaining straps, hanger brackets, suspension sets and white PVC clip on lid Where lighting trunking joints cable trunking, proprietary transition adapters only shall be used Where lighting fittings are shown on the drawings fixed to trunking it shall be deemed that lighting trunking is required Installation of PVC Trunking The requirements of clause Installation of steel Trunking General, C9, shall apply in principal to the installation of PVC trunking. Trunking shall be manufactured from high impact PVC, be resistant to corrosion and supplied in 3000mm nominal lengths. PVC trunking shall be fixed at 1200 mm centres Accessories connected to PVC trunking which require to be earthed shall have a separate circuit protective conductor of equal cross sectional area to the corresponding phase conductor routed back to the associated distribution board PVC trunking shall not be installed where the ambient temperature is likely to exceed 65 C or fall below 0 C Adequate allowance shall be made in the PVC trunking installation to account for expansion and contractions of the trunking in normal operation. A small gap shall Project: Page D.49 Revision T

50 be left between each butting joint. ON any particular run of trunking one joint shall be cemented and on the other grease or proprietary joint compound shall be applied to prevent the ingress of moisture Capacity of Unitrunk Cable Trunking & Underfloor Duct To calculate the size of cable trunking or underfloor duct required for a particular installation, the number of cables of each similar size to be enclosed should be multiplied by the appropriate factor given in table 1, and the total number of units so obtained added together. The figure resulting will enable the trunking or duct size to be determined by reference to Tables 2 & 3 respectively Example To find the size of trunking or underfloor duct to enclose 50 P.V.C cables 2.5mm and 50 P.V.C. cables 6.0mm. From table 1 the factors in the first case will be found to be 10 and the second 19, therefore 50 x 10 = 500 units 50 x 19 = 950 units Total capacity required = 1450 units From table 2 it will be seen that to enclose 1450 units an underfloor duct of 4 x2 having capacity of 1750 units. Cable Size (mm) Table 1 Table 2 Table 3 Trunking Capacity Trunking Size Capacity Duct Size Size Factor (mm) Units (inches) (inches) Duct Size (mm) Capacity Units x 2 50 x x 1 50 x x 2 75 x x 1 75 x x 3 75 x x x x x x x x x x 1 75 x x x x x x x x x x x x 2 75 x x x x x x x x x x x Table 2 for trunking is based on a 45% and table 3 on a 35 % space factor as required by the I.E.E Regulations for the Electrical Equipment of Buildings. It should be noted that square section trunking is in all cases more economical than rectangular section Cable Tray Perforated cable tray shall be supplies in standard lengths form hot dipped galvanised steel to BS EN ISO Widths shall generally be 150mm with 25m uplift unless otherwise specified on the drawing The cable tray shall be of medium duty quality The cables tray shall be supplied with all the relevant bends, tees crossover and reducers, internal and external risers, couplers etc. all of the same manufacture as Project: Page D.50 Revision T

51 the cable tray The tray shall be supported by Unistrut brackets and drop rods at 1.5m, 2,0m or 3.0m centres as recommended by the manufacturer for different uniformly loads Cable tray shall only be cut along a line of plain metal (not perforations) and all cut edges shall be prepared and treated with a zinc rich paint. If holes are cut for the passage of PVC cable, then grommets complying with BS 1767 shall be supplies Screws used with galvanised fittings shall be steel, zinc plated to comply with BS EN and BS EN Fixing brackets used with galvanised cable tray shall be hot dip galvanised, unless only bending and drilling is required. In this case, galvanised mild steel flat bar may be used Cable tray shall be Admiralty pattern of minimum 16 gauge galvanised with return flange RF7 fixed securely to the ceiling by means of unistruts at a minimum if 2 metre centres using drop-rods and rawlbolts etc. The cable tray shall conform to the following dimensions and gauges. Width Depth of Flange Thickness S.W.G. 230mm 15mm mm 20mm mm 20mm mm 20mm Cables shall be fixed to tray by means of Critchely Betastrip Cat. No. 401 and secured at 600mm centres Cables shall be spaced on tray not less than twice their overall diameter Perforated Cable Tray Perforated cable tray shall be supplied in standard lengths of 2450mm formed from plain steel sheet complying with BS 1449 part 1B Classification CR4 GP Bends Bends shall be of the same equipment, thickness and finish as the cable tray and shall have an inner radius of 50mm and a straight length of 100mm at each end No perforations shall be made in the circular portion of 100mm and 150mm bends. On 225 mm and 300mm bends perforations shall be made only along a line set at 45. On 450 mm and 600mm bends perforations shall be made only along lines set at 30 and Tees Tees shall be of the same equipment, thickness and finish as the cable tray. The distance measured between a point of intersection and the end of the fitting shall be 100mm Fixing Screws Mushroom-head stool roofing bolts and nuts complying with BS 1494 Part 1 shall be used to fix together adjacent sections of cable tray and/or accessories. Fixing screws shall be 6mm diameter. Project: Page D.51 Revision T

52 Cable Tray Accessories and Fixings Cable tray shall only be cut along a line of plain metal i.e. not through the perforations. All cut edges of galvanised cable tray shall be prepared and treated with a zinc rich paint Site fabrication of accessories shall be kept to a minimum and manufacturer s standard items shall be used. Where special sections are required the material, thickness and finish shall be s specified for standard items Where welding has been employed in the fabrication of cable tray and/or accessories the area around the joint shall be mechanically prepared and thereafter treated with zinc chrome primer or zinc rich paint according to the original finish of the metal Holes cut in cable tray for the passage of PVC covered cables shall be provided with grommets complying with BS Alternatively they shall be brushed or lined with lead trim to prevent damage to the PVC covering A minimum clear space of 25mm shall be left behind all cable tray Fixings (brackets) for cable tray shall be disposed at regular intervals not exceeding 1200mm and at 225mm from bends and intersections Fixings (brackets) shall be fabricated from mild steel flat bar complying with BS EN 10029, BS 7668, BS EN 10025, and BS EN 10210, as appropriate. When used with galvanised cable tray fixings shall be hot-dip galvanised, unless only bending and drilling is required in the manufacture when galvanised mild steel flat bar may be used. Hot-dip galvanising shall comply with BS EN ISO Coach screws shall comply with BS 1449 and wood screws with BS Where used with galvanised fixings, screws shall be steel, zinc plated (electro-galvanised) to comply with BS EN and BS EN 12330, class B coatings Galvanised Conduit Conduit shall be run neatly on the surface or buried within the carcase of the buildings or in the ground as indicated or as directed by the Engineers Conduit runs shall be determined by the Contractor and agreed by the Engineers before any work is started. Conduit shall be run at least 150mm clear of plumbing and mechanical services Conduit runs shall be run truly vertical, horizontal or parallel with the features of the building Conduit buried in concrete shall have 38mm depth of cover over its entire length. Conduit buried in plaster shall have 6mm depth of cover over its entire length Where conduit is buried in the carcase of a building or in the ground all open ends shall be temporarily plugged to prevent ingress of foreign matter, moisture or water Where conduit is buried in concrete crosses and expansion joint in the concrete it shall be wrapped with waterproof building paper for a distance of 300mm on each side of the joint. Any alternative method of protecting the conduit against stresses due to expansion shall be approved by the Engineers Conduit shall be bent or set on site to suit the structure. Normal bends maybe used with conduit 38mm diameter and above Inspection type elbows, bends or tees shall only be used with the written consent of the Engineers. Solid (non-inspection) conduit elbows or tees shall not be used Project: Page D.52 Revision T

53 anywhere on the installation except as specified in A draw-in box shall be provided in all conduit runs exceeding 10 meters in length or containing more than two right angle bends Conduit shall be supported at regular intervals not exceeding 1200 mm on horizontal runs and 1500mm on vertical runs Conduit boxes both standard and adaptable shall be fixed to the structure of the building independently of the circuit The length of thread on the ends of the conduit shall suit the length of internal thread in the end of the fittings or accessory. Excess length of thread will not be permitted Spanners or purpose made tools shall be used to tighten hexagon bushes. Pliers and toothed wrenches shall not be used Conduits when cut and threaded shall be free form all burrs prior to fixing Conduit threads shall be painted with zinc rich paint prior to fixing Conduit systems erected outside the building shall be weatherproof Conduit run on the surface of building or ducts shall be fixed by means of distance saddles. Fixing screws for saddles shall be of brass Running couplers with backnuts shall not be used: three-piece conduit unions only will be accepted Conduit terminating at boxes, trunking or accessories not provided with spout or tapped entries shall be made mechanically and electrically continuous therewith by means of a flanged coupler and bush with male thread. Exposed conduit threads shall be given a coat of zinc rich paint Conduit buried in the ground shall be wrapped with P.V.C self-adhesive tape half lapped. The taping shall extend for a distance of 150mm beyond the point where the conduit emerges from the ground Installation of Galvanised Steel Conduit Galvanised steel conduit shall be heavy gauge solid drawn type complying with BS 4568 Class 4. The whole of the conduit system shall be completely erected and securely fixed before any cables are drawn in. Concealed conduit shall be fixed with crampets, exposed conduit shall be fixed with spacer bar saddles at 1200 mm centres Inspection boxes, draw in boxes etc. shall be located so they remain accessible at all times The maximum number of cables installed in a conduit shall not be greater than that given in Appendix 12 of the IEE Regulations, latest edition. Cables shall occupy not more than 40% of the cross sectional area of a conduit The inner radius of a conduit bend must not be less than 6 times the outside diameter of the conduit Solid elbows and tees shall only be used directly behind accessories or lighting fittings All burrs shall be removed from the ends of conduits and outlets shall be brushed to prevent the possibility of damage to cables. Exposed conduit threads shall be painted with metallic paint. Project: Page D.53 Revision T

54 Metal conduit is considered a protective conductor and sot he whole of the conduit system shall be effectively bonded to earth Where alternating current circuits are concerned the phase and neutral conductors of a circuit must be drawn into the same conduit. The metal conduit system shall be installed in such a manner that it cannot come into contact with piping of other services (e.g. gas, water) Where this is unavoidable all piped services shall be effectively bonded to earth The conduit installation shall be self-ventilating and drainage outlets (e.g. conduit box with hole drilled in base) shall be provided wherever condensation is likely to occur. Where the conduit system may be subject to ingress of moisture or corrosive vapours etc. all conduit boxes and accessories shall be provided with a PVC gasket Where conduits pass through floors, walls, etc. the holes shall be made good with cement or other suitable fire resisting material Conduits run on steel girders, purlins etc. shall be securely fixed by means of proprietary clips (e.g. fuse). Under no circumstances will drilling of steelwork be allowed Where conduit is run on fairfaced blockwork, accessories and saddles shall be fixed on the centre of the block, with vertical conduit drops run on the joint line of the blockwork The Contractor shall take the necessary steps to prevent the ingress of extraneous materials during installation of a conduit system Conduit routes shall be agreed on site between the Engineer and the Contractor, as shall the position of the draw-in boxes, etc Where the conduit systems serves vibrating or moveable machinery the final connection shall be made using PVC covered flexible steel conduit conforming to BS EN and BS EN Connection to rigid conduit system shall be by malleable iron conduit through box with earth stud or other accessory (eg. Isolator) as specified elsewhere. An earth wire min. 2.5 sq mm CSA shall be run in the flexible conduit connected between the conduit box/accessory and he item of equipment to be connected Flexible cables shall be installed with enough slack to allow for free movement and/or vibration of equipment without unduly affecting the integrity of the rigid conduit system. Only proprietary fittings and accessories shall be used with the flexible conduit system Flexible Steel Conduit Flexible steel conduit shall comply with BS EN and BS EN 61386, and shall be Type A (unpacked) for normal atmospheric conditions or Type B (asbestos packed) for damp situations Adaptors for Flexible Conduit Adaptors shall be of the solid type complying with BS EN and BS EN Flexible Non-Metallic Reinforced Type Conduit Flexible non-metallic reinforced type conduit shall be of steel wire in helical form over which is drawn a sheath of PVC and an overall covering of the same Project: Page D.54 Revision T

55 equipment. The sheath shall be coloured grey unless otherwise indicated or as directed by the Engineers Adaptors made of PVC or of metal and may be crimped or screwed onto the conduit Installation of PVC Conduit The requirements of above clause shall apply in principle to the installation of PVC conduit. PVC conduit shall not be installed where the ambient temperature is likely to exceed 65 C or drop below 0 C Accessories connected by PVC conduit which require to be earthed shall have a separate circuit protective conductor, routed back to the earth terminal of the associated distribution board Adequate allowance shall be made in PVC conduit installation to account for expansion and contraction of the conduit in normal operation. A small gap shall be left between each butting joint.. On any particular run of conduit one joint shall be cemented and the other shall be greased or a proprietary jointing compound shall be applied to prevent the ingress of moisture PVC conduit and accessories shall comply with the requirements of BS Earthing, Bonding and Testing General The Contractor shall include for bonding, earthing and testing the entire installation in accordance with the I.E.E Regulations for Electrical Installations 16th edition, and ET101and ESB Regulations (Second Edition) The earthing system shall be by neutralising. A neutralising block contained in a sturdy enclosure shall be installed on the new main distribution centre (i.e. M.D.C) adjacent to the incoming ESB cable and it shall be connected to the ESB s neutral In addition to the ESB providing a consumer earth terminal, the Electrical Contractor shall provide direct electrical connections to all exposed conductive parts to an earthed point (i.e. earth electrode) A minimum of 3 No. earth electrode rods with integral housing (i.e. inspection kits with galvanised steel rim and lid, galvanised steel rods earth connector clamps and cable sockets) shall be allowed for under this contract and electrodes are to be located so that the resistance areas of the electrodes do not overlap. The entire earthing system shall be installed, inspected and tested in accordance with the I.E.E. wiring Regulations (16th Edition), ET101, and compatible with the ESB requirements and regulations Earth electrodes shall consist of high conductivity copper bonded steel earth rods of nominal 200mm diameter with hardened steel driving tips and be of the extendible type Earth electrodes shall be driven vertically into the ground such that the top of the rod is below ground level. The earth electrode shall be covered with a galvanised steel box with reinforced lid engraved earth electrode the top of which shall align with the finished ground level Where more than one electrode is required to achieve the desired earth connection they shall be separated by a distance not less than the depth of the longest rod in the installation. Project: Page D.55 Revision T

56 Earthing Lead The earthing lead shall connect between the main earth electrode and the main earth bar of the associated main switchboard Unless specified otherwise this shall consist of a 70 sq mm green/yellow PVC covered copper conductor which shall be terminated by means of non-ferrous high tensile clamp with appropriate nuts, bolts, spring washers, washers to a compression lugged cable end The earthing lead shall be provided with a factory made test claim within easy access of the earth electrode. The earthing leads shall be labelled Safety Electrical Earth Do not remove with a metal engraved tap, lettering to be at least 4.5mm high. Exposed sections of the earthing lead shall be protected by galvanised steel conduit Protective Conductor The Protective conductor shall consist of one or more of the following:- a) Metal Sheaths of armoured cables having a conductance not less than half that of the largest phase conductor. b) Separate earth conductors in multicolour cables of equivalent cross sectional area as the phase conductors. c) Single copper conductors in accordance with the following tables:- CSA Phase conductor Smm2 CSA Protective Conductor S<=16 S 16<=S <=35 16 S>35 S/2 d) Metal parts of equipment and enclosures, steel conduit having the required conductivity for adequate protection Equipotential Bonding Main bonding conductors are required at the intake positions of engineering services such as gas pipes, water pipes HVAC etc. These shall be connected directly to the main earthing terminal, main bonding conductors shall consist of 10 sq mm green/yellow PVC covered copper cables unless specified otherwise. Local bonding conductors are required in bathrooms, at immersion groups, for water supplies to kitchens etc. These shall consist of 2.5 sq mm green/yellow PVC covered copper conductors connected to the local circuit protective conductor Equipotential bonding shall be provided in accordance with ET 101. The Equipotential bonding shall be connected to the protective conductor. Bonding conductors shall be provided to interconnect the pipework on both sides of gas, water, and other meters. Gas main, Dry Riser, and hosereel mains shall also be bonded The T.V/Computer installation shall be provided with a separate clean earth Generator Installation General Generators shall have as standard, static battery charger, a sound attenuated weatherproof canopy and a double skinned oil tank. An oil fill pipe and exhaust flue Project: Page D.56 Revision T

57 to outside shall be installed under the electrical contract The generator installation shall conform to ET Scope This specification covers the requirements for the supply, installation and commissioning of a self-contained emergency diesel The generator shall be complete with the following: coolant heater static battery charger double skinned oil tank Separate 24 hr. Double Skinned Fuel tank exhaust flue to outside (if applicable) Anti Vibration Mounts Circuit Breaker Heavy Duty Lead Acid Battery Exhaust Silencer & Flexible Bellows Auto Start Control Panel (c/w V/F contacts for BMS) Electronic Governor Alternator Upgrade Sound Attenuated Weatherproof Canopy (80dBA@ 1m) Fuel Transfer Controls & Pipe Work Semi-rotary Fuel Pump for Manual Fuel Transfer The diesel generator shall be designed to operate under the following environmental conditions: Ambient Temperature 40 o max. 30 o average over 24 hrs. Relative Humidity 50% at +30 o C max Standards and Codes The diesel generator shall comply with the latest editions of the following standards: EU directives 89/392/EU, 91/368/EU and 93/44/EU.. Electro Technical Council of Ireland (ETCI) Regulations. Safety, Health and Welfare at Work Regulations 1993 (SI No. 44 of 1993). BS BS EN IEC BS BS BS EN ISO BS ISO to 6. BS ISO & 10. BS EN IEC BS EN IEC ISO BS EN 953. BS EN BS EN & -4. BS EN & -2. BS EN BS EN Project: Page D.57 Revision T

58 BS EN IEC Standards. Requirements of the local Fire Services Department. EU Stage 2 emissions Ratings The generator set shall comply with the following requirements: Nominal output voltage 400/230V. Phases 3 phase, 4 wire. Frequency 50 Hertz. Connection Star Noise The generator shall be supplied with sound attenuated enclosure and additional air inlet and outlet attenuators to reduce the noise level to 60dbA 1m from the generator while running at 100% load Engine The diesel engine shall be manufactured to comply with BS The governor shall be of the electronic type and meet the accuracy requirements of class G2 to ISO The engine shall be supplied with energised to run shutdown solenoid for fail safe operation. Oil pressure switches and water temperature switches. Oil pressure and water temperature senders shall be supplied Cooling Radiator The radiator and cooling fan shall be complete with protection guards, designed to cool engine at specified output in air-on temperatures up to 40 degrees Celsius. A low coolant level alarm shall be fitted Engine Filtration System Cartridge type dry air filters, cartridge type fuel filters and full flow lube oil filters shall be supplied Exhaust System A heavy duty capacity exhaust silencer system shall be supplied to reduce the noise level Electric System A 12 volt system with battery charging alternator and axial type starter motor shall be supplied. High capacity lead acid starting batteries, battery rack mounted in machine baseframe and heavy duty interconnecting cables with terminations shall be supplied Alternator The alternator shall be brushless, screen protected and drip-proof, separately Project: Page D.58 Revision T

59 excited by means of a separate winding or permanent magnet, self regulating with fully interconnected damper windings and sealed-for-life bearings The insulation system is Class H. All windings are impregnated in either a triple dip thermo-setting moisture, oil and acid resisting polyester varnish or vacuum pressure impregnated with a special polyester resin. A heavy coat of anti-tracking varnish for additional protection against moisture or condensation shall be included The alternator shall be in accordance with BS5000 part 99, IEC34-1, VDE0530, UTE51100, NEMW MG Automatic Voltage Regulator The fully sealed automatic voltage regulator shall monitor all three phases and maintain the voltage within the limits of +/- 0.5% from no load to full load including cold to hot variations at any power factor between 0.8 lagging and unity and inclusive of speed variation of 4.5% Nominal adjustment by means of a trimmer incorporated in the AVR shall be included Waveform Distortion, THF and TIF Factors The total distortion of the voltage waveform with open circuit between phases or phase and neutral shall be in the order of 2. On a 3 phase balanced harmonic-free load the total distortion shall be in the order of 3.5%. The alternator shall be designed to have a THF better that 2% and a TIF better than 50. The alternator shall have a 2/3 pitch factor Radio Interference Suppression shall be in line with the provisions of BS800 and BDE class G and N Motor Starting An overload capacity equivalent to 300% of full load impedance at zero power factor shall be sustained for 10 seconds Mounting Arrangement - Safety Features The complete generator shall be mounted, as a whole, on a heavy duty fabricated and welded steel baseframe constructed from folded channel sections. The baseframe shall incorporate specially designed crane lifting devices The engine and alternator shall be directly coupled by means of an SAE flange so that there is no possibility of misalignment after prolonged use. The engine flywheel shall be flexibly coupled to the alternator rotor and a full torsional analysis has been carried out to guarantee no harmful vibration will occur in the assembly Anti-vibration pads shall be supplied Doubled Skinned Fuel Tank The baseframe shall be fitted with an integral double skinned fuel tank with a capacity 24 hours operation. Leak detection shall be provided by means of a float switch in the outer tank. The tank shall be supplied complete with high and low level contacts, contents indication, fuel fill cap with breather and strainer, fuel feed and return lines to engine and drain plug. Project: Page D.59 Revision T

60 Control System The control panel shall be for set mounting and shall contain the means of starting and stopping the generator, monitoring its operation and output, and automatically shutting it down in the event of a critical condition arising such as a low oil pressure or high engine coolant temperature The Digital Automatic Start Control Panel shall contain the following: Shutdown and alarms channels low oil pressure failed to start high coolant temp overspeed Alarm channels only approaching low oil pressure approaching high coolant temp low battery voltage battery charger failure system not in auto mode Fault logging full fault log memory common voltage free alarm Remote signals contact open protocol communication interface Instrumentation start attempt counter voltmeter ammeter kilowatt meter kilovar meter power factor meter frequency meter battery voltmeter hours run counter oil pressure gauge coolant temp gauge Control switches run-off-auto switch emergency stop button Remote Monitoring by means of Open Protocol Communication Interface The control panel shall be equipped with an open protocol communication interface RS-422 and RS Circuit Breaker A 3 pole moulded case circuit breaker shall be mounted on the generator in a vibration isolated sheet steel cubicle with adequate access for incoming and outgoing cables Sound Attenuated Canopy Sound attenuated canopies have the following features: Construction Body made from steel Stainless steel locks and hinges Zinc plated or stainless steel fasteners Project: Page D.60 Revision T

61 Sheet steel components pre treated with zinc phosphate prior to polyester powder coating Maintenance Access Full length extra wide doors on each side Doors top hung and supported by gas struts Radiator fill access plate Lub oil and cooling water drains piped to exterior canopy Security and Safety Lockable hinged safety glass window allowing access to control panel Emergency stop button mounted on canopy exterior Cooling fan and battery charging alternator fully guarded Lockable control panel Fuel fill can only be reached via lockable access doors Exhaust silencing system totally enclosed for operator safety Equipment Finish All sheet metal components shall be fully degreased, phosphated and chromated for anti-corrosive protection prior to the painting with polyester powder. The powder shall be cured at a temperature of 200 degrees centigrade to ensure maximum scuff resistance and durability. All fasteners shall be electroplated. The engine and alternator shall be thoroughly cleaned and finished in temperature controlled ovens with industrial high gloss polyurethane Documentation A full set of operation and maintenance manuals, circuit wiring diagrams, commissioning/fault finding instruction leaflets shall be supplied Factory Tests The generator set shall be load tested before despatch. All faults, control functions and site load conditions shall be simulated and the generator and its systems checked and proved. A test certificate shall be provided Installation The installation shall consist of the following: Delivery / Off-loading: Delivery to site Off-loading Setting into position within the generator room Exhaust System: Supply and install twin walled, insulated stainless steel exhaust pipework from the generator set to a point as shown on the layout drawing Fuel Storage Tank: Supply a first fill of fuel storage tank Commissioning - Supply and install: Lubricating oil in the engine sump Project: Page D.61 Revision T

62 Anti-freeze and coolant to the engine cooling system Battery acid in the starting batteries (supplied dry charged) Connect starting batteries Testing: Carrying out of a full operational check on the installation Carrying out of a load test with factory load Carrying out a comprehensive engine safety shutdown Carrying out a detailed client instruction Warranty All equipment shall be guaranteed for a period of 12 months from date of commissioning or 18 months from shipping, whichever occurs first Uninterruptible Power Supply Installation General The UPS module to consist of a rectifier, battery converter, three-phase inverter, static transfer output switch, mains bypass static switch & internal batteries The inverter to be solid-state, capable of providing the rated output power. The inverter is Vector Controlled design and utilises insulated gate bipolar transistors, switching at high frequency in order to minimise output voltage distortion. The static switches to be the solid-state devices that, operating simultaneously, can instantaneously connect the load to the alternate AC source This UPS is to automatically maintain AC power within specified tolerances to the critical load, without interruption (for specified duration as per battery run time), during failure or deterioration of the mains power supply The manufacturer shall design and furnish all materials and equipment to be fully compatible with electrical, environmental, and space conditions at the site. It shall include all equipment to properly interface the AC power source to the intended load and be designed for unattended operation Standards The UPS and all associated equipment and components shall be manufactured in accordance with the following applicable standards: EN (incorporating EN 60950) EN , ,60529 IEC , , IEC IEC ANSI C The UPS shall be CE marked in accordance with EEC directives 73/23 low voltage and 89/336 electromagnetic compatibility The Quality System for the engineering and manufacturing facility shall be certificated to conform to Quality System Standard ISO 9001 for the design and manufacture of power protection systems for computers and other sensitive electronics. Project: Page D.62 Revision T

63 Scope of Works The Tenderer is to include for the following: Supply, Install & Commission UPS system as described in the Particular Specification and on the drawings. Supply, Install & Commission 10 year design life batteries to provide autonomy as described in the Particular Specification at 100% load. Supply of externally mounted bypass switch. This is a manually operated external make-before-break bypass switch c\w UPS input isolator, to provide: - A no-break isolation of the UPS to ensure the safety of maintenance personnel, - A means of routing the mains supply directly to the load in the event of a total system failure. DC Cabling between the UPS and battery system Full set of volt free contacts to BMS system Local & Remote EPO facility Delivery & offloading Positioning on site Testing & commissioning 12 month warranty Provide client demonstration and O&M Manuals The UPS unit shall consist of the following UPS module as per the Particular Specification Built in anti-harmonic filter Temperature compensated charger / rectifier 10 year battery rack Battery circuit breaker Built in static switch (automatic by-pass) Built in manual bypass (maintenance by-pass) Top cable entry plate SNMP/XML web card to connect UPS to WAN/LAN/Internet & BMS The mounting of external bypass switch & all AC cabling shall be by the Electrical Contractor System Description Load voltage and bypass line voltage will be 400VAC, three phase and neutral Input voltage will be 400VAC, three phase The batteries to have a 10 year design life On-line Configuration The UPS system shall operate as a true on-line double conversion system in the following modes: a) On-line Mode - During on-line operation mode, the UPS system shall be used to provide precise regulated and transient-free power to the computer equipment loads. The mains supply provides power to the input converter. The input converter shall provide regulated DC power to support the inverter and simultaneously supply the battery charger to maintain the Project: Page D.63 Revision T

64 Input Converter battery in a fully charged condition. The inverter shall convert the DC power into regulated AC power for the load. b) ECO Mode - When the load does not require highest level of protection, the UPS shall be able to work in an energy saving mode. This mode shall be fully programmable to adapt it to the load and customer needs. When ECO mode is activated the UPS switches automatically to bypass as a function of the actual mains quality. In case of a mains imperfection (out of tolerances) the UPS seamlessly returns to On-line mode without compromising the guarantee of total security for the critical load. This mode will not be activated unless specifically requested by the client on site. c) Battery Mode - Upon failure of the mains supply, input power for the inverter shall automatically be supplied from the connected battery. When the mains is restored or the standby generator set supply is ready, input power for the inverter and for recharging the battery shall automatically be supplied from the rectifier. If the input does not return, the UPS shall automatically shut itself down in an orderly manner when the discharge limit of the battery is reached. d) By-pass Mode - Upon the failure of static inverter, the no-break static transfer switch shall be activated automatically to isolate the faulty inverter and at the same time maintain a continuous supply to the system load. The automatic transfer mode shall also operate in the event of system overloading or if irregular or undesirable output for the load is detected. In this case, the system shall automatically return to the original on-line mode operation if the disturbance is cleared. e) Manual By-pass Mode - If the UPS system needs to be isolated for service or maintenance, the maintenance by-pass shall transfer the load from inverter to the mains without interruption and vice versa The input converter shall consist of a rectifier which converts the utility voltage into an unregulated DC voltage. This unregulated DC voltage is converted in a regulated, controlled DC voltage by a boost converter. The boost converter supplies power to the inverter and to the battery charger. The boost converter also provides a power factor corrected input to the UPS The UPS shall have sufficient capacity to support a fully loaded inverter and at the same time maintain the battery in a fully charged condition Battery Charger If the battery is fully discharged, with the standard current, the battery charger shall recharge the battery to 90% of its fully charged condition preferably within six to eight (6-8) hours and at the same time supplying full load current to the system. Otherwise the UPS supplier shall specify the charging time required Temperature Compensated Charging - The battery charger output voltage shall be automatically adjusted in proportion to the ambient temperature of the battery as per the battery supplier's recommendation to avoid over-charging Current and Voltage Limit - The rectifier/charger output current and voltage shall be limited to the battery supplier's recommendation. Project: Page D.64 Revision T

65 Inverter General - The conversion of DC to AC must be accomplished by power transistors of the IGBT type. Failure of any components or power stage shall not interrupt the AC output. Instead it shall disconnect itself from the configuration while transferring the load to the static transfer switch and activate an alarm Output - The inverter output voltage shall be controlled by microprocessor-based software (software generated sine wave) The waveform shall be fed through a filter circuit and protected by fast fuses. The inverter shall be able to handle short-circuit conditions without any damage Neutral - The neutral of the inverter output shall be electrically isolated from the UPS system chassis Frequency Control - The output frequency of the inverter shall be controlled by an oscillator, which can be operated as a free running unit or in synchronised operation with a separate AC source If the external synchronising source deviates from the pre-set frequency by + 4% (adjustable), the oscillator shall automatically revert to free-running, and the microprocessor controlled accuracy shall be + 0.1% Electronic by-pass switch The electronic by-pass shall consist of a static SCR-switch, used to provide an uninterruptible transfer of the load to the utility in case of remarkable variation of the output voltage The electronic by-pass switch shall return the load automatically to the UPS when the malfunction or overload is cleared The electronic by-pass switch shall consist of microprocessor controlled thyristors The electronic by-pass switch shall be able to be activated manually by a switch/push button to test bypass operation. The switching time from inverter to reserve (bypass) and vice-versa shall be of No-Break. If there is no synchronisation this test should be disabled automatically Maintenance By-Pass The maintenance by-pass shall be based on a manually operated switch which allows the electrical isolation of the UPS from the load while still supplying the load with power directly from the utility Instrumentation A back-lit 4 x 20 alpha-numeric characters Liquid Crystal Display (LCD), controlled by push buttons shall be provided The UPS system main control panel with LCD back-lit display shall include the following measurements indications: Mains voltage and mains frequency, and the current delivered by the mains Output voltage and output frequency, and the current delivered by the UPS Battery voltage and DC link voltage Remaining runtime (during mains failure) The total operating time of the UPS and inverter Project: Page D.65 Revision T

66 The UPS system main control panel with LCD back-lit display shall include the following indications or controls: Start of a battery test Forced (manual) transfer to bypass Enable/disable ECO mode The UPS system main control panel with LCD back-lit display shall include the following settings: Setting of the system operating frequency Setting of the system output voltage Setting of the installed battery capacity Bypass enable/disable Language on display (English / German / French / Spanish / Italian / Finnish) On the system alarm panel, a common audible alarm and indicating LED s shall be initiated when any of the following conditions are present: UPS is on battery operation UPS is on bypass operation UPS is on manual bypass operation Output is not synchronized to input Bypass input is out of limits High temperature Overload Batteries need to be replaced Batteries have low voltage (battery low) The UPS must be able to store up to 255 alarms or events Tenderer shall provide detailed information for the above-mentioned together with their tender submission Mechanical Design Enclosure - The UPS system shall be housed in free standing steel cabinet Colour - The UPS cabinet colour shall be RAL Ventilation - Forced air-cooling shall be provided to ensure that all components are operated within specifications with air entry on the side and exit in the top Cable Entry - Input to the system and outgoing cables shall be from the rear or the side of the cabinet Modular Construction - The UPS system shall be modular in construction for ease of maintenance and to minimise downtime Power Connections - Adequate space for termination shall be provided for incoming and outgoing cables. The cables for interconnecting the UPS and battery cubicles shall be supplied for side by side installation Protection - The equipment shall meet the requirements of protection class IP Acceptance The tenderer shall submit detailed acceptance procedures and checklist which shall be designed to verify the full compliance of the installed system with this Project: Page D.66 Revision T

67 specification The acceptance test shall be carried out by the contractor's engineer and witnessed by the end-user's Project Engineer Three copies of the test report and commissioning certificate stating that the system has been installed and commissioned to the requirement of the specification shall be submitted to the end-user on handing over the commissioned system Documentation All documentation shall be written in good, simple and concise English using accepted technical terms, symbols and nomenclatures. For submission, all documentation shall be bounded with hard covers The document shall be updated regularly as the installation progresses. All changes in the installation layout, wiring, cabling and design shall be incorporated in its final edition. Three copies of this final edition shall be handed over to end-user upon commissioning of the system The final edition of the hand-over documents shall cover design, installation, commissioning, operation and maintenance aspects of the system One set of basic consumable spare parts shall be supplied under the contract Options for Interfacing and Communications Potential Free Contacts must be available on the UPS to indicate at least 6 alarms. The alarm to be indicated should be free programmable from a list of alarms and working condition presents in the UPS software which should contain at least: general alarm; bypass active; battery low; utility failure ; Stop Operation Input Connections for customer provided signals must be available emergency power off (to shutdown UPS and load in the event of an emergency) SNMP adapter - It shall be possible to connect the UPS to a TCP/IP network using SNMP (simple network management protocol) using the international standard UPS MIB. The SNMP adapter can be a plug-in card, an external SNMP box or a PC with a proxy agent UPS Data Protection Software - The UPS shall have available data protection software compatible with Windows 7, Windows Vista, Windows XP, UNIX, Novell, OS/2 and other common operating systems Internet Information and Alarm transmitting - The UPS shall be able to communicate relevant data and alarms via the Internet to multiple addresses as E- mail, FAX and SMS. The remote access to the UPS shall be protected Tender Submission Requirement The tender submission shall be in sufficient details to show compliance to the specification and shall include a full set of descriptive and technical literature on the equipment and system proposed The following drawings and information are to be submitted with the proposal: Functional description Dimensions, weight and heat dissipation of units Layout plan of front and rear panel. Installation drawings Project: Page D.67 Revision T

68 Environmental Conditions The UPS system shall be capable of withstanding any combination of the following environment conditions in which it must operate, without mechanical or electrical damage or degradation of operating characteristics: Ambient temperature 0 to 40 degrees C (not recommended for batteries) Relative Humidity Up to 95% (non-condensing) Interference The UPS equipment shall be provided with EMI/RFI suppression following EN Audible Noise Noise generated by the UPS system under any condition of normal operation shall not exceed an allowable sound pressure level of 55 meter according to EN Backfeed Protection For safety purposes the UPS shall be equipped with a backfeed protection contactor in the bypass circuit, complying to IEC This backfeed protection shall be installed standard inside the UPS cabinet. Project: Page D.68 Revision T

69 Performance Requirements The performance of the system shall be as per the following tables: Project: Page D.69 Revision T

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