Work involving High Voltage (HV) Systems and Maintenance of Plant.

Transcription

1 University of Strathclyde Estates Services Electrical Procedure No E001 Procedure No: ELE 001 Procedure Title: Work involving High Voltage (HV) Systems and Maintenance of Plant. Visual check and operational testing of :- 1. HV switch tripping batteries 2. Automatic fire detection equipment contained in HV Substations and Enclosures. (Annual Testing)` 3. Overcurrent & Earth fault protection. (Annual Testing) 4. High Partial Discharge (PD) Activity Survey. (Annual Testing) 5. HV switchgear safety equipment. 6. High Voltage Switchgear () 7. HV/LV Transformers () 8. Transformer Moisture Absorption Breather ( Annual Testing) Date of Procedure: March 2012 (Rev 4) Responsible Person(s) Authorising HV Engineer, Senior Authorised Persons, Authorised Persons & Competent Persons. Who Requires to Use this Procedure: Estates Department - Authorising HV Engineer, Senior Authorised Persons, Authorised Persons & Competent Persons. Outsourced HV Contractors - HV Sub-Contractors & Competent Persons. Legislative or Other Compliance: Work Regs 1989 H & W Act 1974 etc. University of Strathclyde Electrical Safety Rules for High Voltage Systems Overview: POLICY, PHILOSOPHY AND PRINCIPLES OF SAFETY RULES FOR HIGH VOLTAGE (HV) 11,000 VOLT INSTALLATIONS POLICY The University of Strathclyde general Policy Statement on Health and Safety at work prepared and issued under Section 2 (3) of the Health and Safety at Work etc. Act and contained in the University s Health and Safety Policy Approved by Court August 2005 makes specific reference to departmental Safety Regulations Section 3 sub-section 3.3 as follows. (i) in requiring every employee while at work to Departmental Safety Regulations, procedures and codes of practice, to take reasonable Date: 2 June 2011 Page 1 of 5

2 University of Strathclyde Estates Services Electrical Procedure No E001 care for the health and safety of himself/herself and other persons who may be affected by his/her actions and to co-operate with management in the implementation of health and safety matters; (ii) (iii) in providing employees with such information, instruction, training and re-training and supervision as appropriate to ensure employees are adequately informed on health and safety matters; University of Strathclyde, Department of Safety Services are appointed to advise Estates Services on matters affecting the safety of employees at work and of the public where they may be affected by the University s operations in order to ensure conformity with legislation. Narrative: The need to work safely with high voltage electricity, within a framework of legislative requirements and local rules places a responsibility on all those staff charged with maintaining and operating the University s high voltage network. The University of Strathclyde prepare safety documentation, written procedures e.g. Permit to Work, Limitation of Access & Sanction for Test and carry out switching operations all in compliance with the University s Electrical Safety Rules for High Voltage Systems The foregoing Rules are amended as required to reflect the adoption of new rules or changes to existing rules. As high voltage operations within a University environment is not a regular occurrence, it has always been a slow learning curve to those Authorised Persons undergoing hands on experience. It is accepted that a greater emphasis be placed on using external classroom models to support on the site training. Those external bodies, normally Supply Authorities whose primary function is to operate and maintain high voltage systems shall provide necessary classroom training to University HV Authorised personnel at their training centres. Operations: To achieve compliance with legislation, it is the responsibility of Estates Services to ensure that any work carried out involving High Voltage apparatus and networks is controlled. The methods for control are summarised below (see Procedures) and are contained in All modification, maintenance and/or emergency repair works carried out by University Staff on the University s high voltage apparatus and networks must be carried out by adequately trained, experienced and competent personnel. The work that is carried out requires assessing, checking, auditing, and recording. All training records for staff must be centrally maintained by a nominated * HV Authorised Person in accordance with the University s Electrical Safety Rules for High Voltage Systems. All records of equipment, manuals, and user information require to be maintained by a nominated *Authorised Person in an accessible location. Any new HV installation work requires to be authorised by an * Authorised Person employed by the department of Estates Services. Procedures: 1.0 Date: 2 June 2011 Page 2 of 5

3 University of Strathclyde Estates Services Electrical Procedure No E001 Examination and testing of HV switch tripping batteries (Weekly, monthly & annually) Battery examination and charger operation shall be carried out by a competent person &/or by an outsourced service engineers. The schedule of checks to be all as per Estates Services Frontline ppm database A record of the testing shall be kept by the Estates Services Electrical Supervisor / Foreman with a copy forwarded to the departments Senior Electrical Engineer for information. 2.0 Testing of Fire Alarms contained in High Voltage Substations BS5839 (Annual) All automatic fire detection apparatus incl. break glass call points shall be tested all in compliance with BS5839 Part 1. All fire detection apparatus shall be routinely tested no less than once per annum. The testing shall be carried out in conjunction with University Security personnel, University Security Control, Livingstone Tower, outsourced fire service providers and/or University Estates Services DLO. Written procedures (Limitation of Access etc. doc.) shall be required to enter rooms containing HV Equipment. A record of the testing shall be held on file in the Electrical Supervisors office together with a log of necessary follow up repairs works. The schedule of checks to be all as per Estates Services Frontline ppm database. 3.0 HV Over Current and Earth Fault Protection Switch Tripping Relays (Annual Testing) All University HV over current (O/C) earth fault (E/F) and remote switch tripping buttons and relays to be operated no less than once per annum. Testing shall comprise of the manual tripping of O/C, E/F relays and remote tripping buttons where provided on HV switchgear servicing the John Anderson and Jordanhill Campuses. Those carrying out the testing shall be competent to carry out such tests and received on site training. Note; For information an inventory of High Voltage Switchgear can be downloaded from Estates Services PPM data base. The schedule of checks to be all as per Estates Services Frontline ppm database. 4.0 High Partial Discharge (PD) Activity Survey (Annual Testing) Those carrying out this survey shall be competent to carry out such tests and has received equipment training. Note; For information an inventory of High Voltage Switchgear can be downloaded from Estates Services PPM data base. Using the purpose made partial discharge test unit, carry out a PD survey on all HV Switchgear (11,000 volts) including Transformers. Post surveys prepare and submit a report for the attention of the Senior Electrical Engineer, Estates Services. Where abnormal PD activity has been discovered the contents of the report will record the actual level of PD in db and also the report will record where no PD activity is evident. The schedule of checks to be all as per Estates Services Frontline ppm database. 5.0 HV switchgear Safety Equipment. (Annual Testing) Date: 2 June 2011 Page 3 of 5

4 University of Strathclyde Estates Services Electrical Procedure No E001 All safety equipment contained in HV substations shall be visually examined and tested operational integrity. Note; For information an inventory of safety equipment can be downloaded from Estates Services PPM data base. The schedule of checks to be all as per Estates Services Frontline ppm database. 6.0 Testing and Maintenance of High Voltage Switchgear () Where it is necessary to interconnect the LV back feeder networks to maintain power supply a Switching Procedure doc to be raised and authorised by HV Senior Authorised staff. Those carrying out the oil sampling of HV OCB s and Transformers shall wear adequate PPE to cover the risk of contact with oil. Those carrying out the oil sampling of HV OCB s and Transformers shall be competent to carry out such tests and received on site training. Note; For information an inventory of High Voltage Switchgear can be downloaded from Estates Services PPM data base. HV OCB s & Oil Switches Arrange for fully competent, experienced and outsourced contractors to undertake the above works. Note; The schedule of checks to be all as per Estates Services Frontline ppm database 7.0 Testing and Maintenance of High Voltage Transformers () Those persons managing such works must have an Authorisation level no less than Senior HV Authorise Person. Note; For information an inventory of High Voltage Transformers can be downloaded from Estates Services PPM data base. The schedule of checks to be all as per Estates Services Frontline ppm database. Examination of Moisture Absorption Breathers (1 Yearly) Those carrying out such works have an Authorisation level no less than of the University s HV Schedule of Authorisation or via written procedures. Note; For information an inventory of High Voltage Transformers can be downloaded from Estates Services PPM data base. Those carrying out the testing shall be competent to carry out such tests and received on site training. A record of the testing shall be retained on file by the: - 1.Estates Services, Senior Electrical Engineer 2.Estates Services, Electrical Supervisor / Foreman All necessary midel renewal, desiccant replacement to be actioned in conjunction with maintenance programmes. APPENDICES Date: 2 June 2011 Page 4 of 5

5 University of Strathclyde Estates Services Electrical Procedure No E001 Date: 2 June 2011 Page 5 of 5

6 Frontline ppm schedule example of HV Substation tasks Work involving High Voltage (HV) Systems and Maintenance of Plant. Visual check and operational testing of:- 1. HV switch tripping batteries (weekly, monthly, 6 monthly and annually) 2. Automatic fire detection equipment contained in HV Substations. (Annual Testing)` 3. Overcurrent & Earth fault protection. (Annual Testing) 4. High Partial Discharge (PD) Activity Survey. (Annual Testing) 5. HV switchgear safety equipment. (Annual Testing) 6. High Voltage Switchgear () 7. HV/LV Transformers to include examination of Moisture Absorption Breathers (5 Yearly) HV Substation Richmond Street Room Asset No E/A1/HV/0001 Location:- Architecture Building Item 1 Job line Task Frequency 1/1 HV switch tripping Batteries Confirmation that the battery cubicle has a mains ON visual Weekly indication light illuminated and where available check the voltage of the batteries using the voltage indication gauge. Log the check in the Record Book. Battery examination, cleaning and greasing of battery posts and Monthly topping up of cells using distilled water. Log the check in the Record Book. Battery examination and charger operation shall be carried out by outsourced service providers and a Report prepared by them as to the condition forwarded to Estates Services, Electrical Supervisor for action. Log the check in the Record Book. A record of the testing shall be kept by the Estates Services Electrical Supervisor / Foreman with a copy forwarded to the departments Senior Electrical Engineer for information. Log the check in the Record Book. For more information refer Electrical Procedure No. ELE001 PPM Asset No. E/A1/TB/0001 Battery Cubicle Details TBC Item 2 Job line Task Frequency 2/1 Automatic fire detection equipment contained in HV Substations. (Annual Testing)` All automatic fire detection apparatus incl. break glass call points shall be tested all in compliance with BS5839 Part 1. The testing shall be carried out in conjunction with University Security personnel, University Security Control, Livingstone Tower, outsourced fire service providers and/or University Estates Department DLO. Written procedures (Limitation of Access etc. doc.) shall be required to enter rooms containing HV Equipment. For more information refer Electrical Procedure No. ELE001 PPM Room Asset No E/A1/HV/0001 Fire Detection Apparatus Details TBC

7 Frontline ppm schedule example of HV Substation tasks Item 3 Job line Task Frequency 3/1 Overcurrent & Earth fault protection Testing shall comprise of the manual tripping of O/C, E/F relays and remote tripping buttons where provided on HV switchgear servicing the John Anderson and Jordanhill Campuses. A record of the testing shall be kept by the Estates Services Electrical Supervisor / Foreman with a copy forwarded to the departments Senior Electrical Engineer for information. PPM Asset No Birkbeck Court S/S Interconnector - Reyrolle E/A1/PE/0001 TJX Ser. No. H2N1535 PPM Asset No Wolfson 750kVA Transformer - Reyrolle E/A1/PE/0002 TDB Ser. No. D3C 903 PPM Asset No Anderson Building 1000kVA Transformer - E/A1/PE/0003 Reyrolle TDB Ser. No. B3B 643 PPM Asset No Architecture1000kVA Transformer - Reyrolle E/A1/PE/0004 PPM Asset No E/A1/PE/0005 TJV O/C & Reyrolle QT E/F G2W 1081 Colville 1000kVA Transformer No 1 - Reyrolle TJV O/C & Reyrolle QT Ser No. G2W 1080 Item 4 Job line Task Frequency 4/1 High Partial Discharge (PD) Activity Survey. Using the purpose made (Ultratev Plus) partial discharge test unit, carry out a PD survey on all HV Switchgear (11,000 volts) including Transformers. Post surveys prepare and submit a report for the attention of the Senior Electrical Engineer, Estates Services. Where abnormal PD activity has been discovered the contents of the report will record the actual level of PD in db and also the report will record where no PD activity is evident. PPM Room Asset No E/A1/HV/0001 Item 5 Job line Task Frequency 5/1 HV Switchgear Safety Equipment - Test Plugs Visually examine and test testing plugs for condition and integrity, lubricate securing wing nut studs and carry out any necessary repairs. PPM Asset No E/A1/TP/0001 5/2 HV Switchgear Safety Equipment - Remote Closing Unit Visually examine and test remote closing unit for condition and integrity and carry out any necessary repairs. PPM Asset No E/A1/RCU/0001 5/3 HV Switchgear Safety Equipment - Break Back handles Visually examine break back handles for condition and integrity and carry out any necessary repairs. PPM Asset No??

8 Frontline ppm schedule example of HV Substation tasks 5/4 HV Switchgear Safety Equipment - Fire Extinguisher/s Examine and check fire extinguishers in HV Substation British Standards 5306 ; Part recommends that CO² extinguishers are given a basic service every 12 months (- / + 1 month) PPM Asset No E/A1/FE/0001 5/5 HV Switchgear Safety Equipment Switchgear and Transformer Earthing Examine and visually check for integrity the earthing provisions within the substation and report any issues to management. Arrange for the earthing provisions to be tested all in accordance with BS7671 Earthing Arrangements and Protective Conductors and a record of the test to be forwarded to Building Services (Electrical) Section for actions to be taken. PPM Room Asset No E/A1/HV/0001 5/6 HV Switchgear Safety Equipment OCB Racking Handle Visually examine OCB racking handle for condition and integrity and carry out any necessary repairs or completely renewal. PPM Asset No E/A1/RH/0001 Item 6 Job line Task Frequency 6/1 High Voltage Switchgear PPM Asset No E/A1/OCB/0001 Birkbeck Court S/S OCB 400A Interconnector Ser No 2SS LMT /2 High Voltage Switchgear PPM Asset No E/A1/OCB/0002 Wolfson 750kVA Transformer OCB Ser No. TBC 6/3 High Voltage Switchgear PPM Asset No E/A1/OCB/0003 Anderson Building 1000kVA Transformer 400A OCB Ser No 2WS LMT /4 High Voltage Switchgear PPM Asset No E/A1/BC/0001 Bus-Section 400A OCB

9 Frontline ppm schedule example of HV Substation tasks Ser No 3HSLMT407 6/5 High Voltage Switchgear PPM Asset No E/A1/OS/0001 Non Auto 400A OCB Switch - Incomer from George Street (East )S/S Ser No 3HS LMT X6 - JO 6/6 High Voltage Switchgear PPM Asset No E/A1/OS/0002 Non Auto 400A OCB Switch -Incomer from Central S/S Ser No 3HS LMT 409 6/7 High Voltage Switchgear PPM Asset No E/A1/OCB/0004 Anderson 1000kVA Transformer 400A OCB Ser No. 3 BS LMT /8 High Voltage Switchgear PPM Asset No E/A1/OCB/0005 Colville 1000kVA Transformer No 1 400A OCB Ser No 2 WS LMT 3623 HV Transformer Room Room Asset No E/A1/HV/0002 Location:- Architecture Building 1/1 HV Transformer PPM Asset No E/A1/1T/0001 Bonar Long 1000kVA Ser. No. 02/65/1148 1/2 Transformer Moisture Absorption Unit Visually examine moisture absorption unit and confirm if the absorption crystals are acceptable. Clean filter and smear seal

10 Frontline ppm schedule example of HV Substation tasks with a light coating of mineral oil. Completely renew if unit is beyond serviceability PPM Asset No E/A1/1T/0001 2/1 HV Switchgear Safety Equipment Switchgear and Transformer Earthing Examine and visually check for integrity the earthing provisions within the substation and report any issues to management. 2/2 Arrange for the earthing provisions to be tested all in accordance with BS7671 Earthing Arrangements and Protective Conductors and a record of the test to be forwarded to Building Services (Electrical) Section for actions to be taken. PPM Room Asset No E/A1/HV/0002 3/1 HV Switchgear Safety Equipment - Fire Extinguisher/s Examine and check fire extinguishers in HV Substation British Standards 5306 ; Part recommends that CO² extinguishers are given a basic service every 12 months (- / + 1 month) PPM Asset No E/A1/FE/0002 4/1 Automatic fire detection equipment contained in Transformer Room (Annual Testing)` All automatic fire detection apparatus incl. break glass call points shall be tested all in compliance with BS5839 Part 1. The testing shall be carried out in conjunction with University Security personnel, University Security Control, Livingstone Tower, outsourced fire service providers and/or University Estates Department DLO. Written procedures (Limitation of Access etc. doc.) shall be required to enter rooms containing HV Equipment. PPM Room Asset No E/A1/HV/0002 Fire Detection Apparatus Details TBC