Page 1 of 5 Title Plan and carry out low voltage (LV) and extra-low voltage (ELV) electrical installations to substation equipment Level 4 Credits 4 Purpose People credited with this unit standard are able to: demonstrate knowledge of the types of electrical switchboards used in substations; demonstrate knowledge of installation requirements for electrical switchboards in substations; plan, install and terminate LV and ELV wiring in a substation; and test an electrical installation for compliance with AS/NZS3000. This unit standard leads to the partial fulfilment of the requirements for registration with the Electrical Workers Registration Board (EWRB). Classification Electricity Supply > Electricity Supply - Core Skills Available grade Achieved Explanatory notes 1 This unit standard is intended for, but not restricted to, workplace assessment. The range statements and evidence requirements across the unit standard can be applied according to industry specific equipment, procedures, and processes. 2 As only registered persons can complete certificates for compliance, a practice certificate of compliance is to be used for assessment against this unit standard. 3 Performance and work practices in relation to the outcomes and evidence requirements must comply with all current legislation, especially the Electricity Act 1992 and any subsequent amendments, and any regulations, codes of practice recognised under that statute, Health and Safety in Employment Act 1992, the Resource Management Act 1991, and their subsequent amendments, electricity supply industry codes of practice and documented enterprise procedures. These include the latest version of Safety Manual Electricity Industry (SM-EI) () Wellington: Electricity Engineers Association. A full list of current legislation and industry codes is available from: Infrastructure Industry Training Organisation PO Box 1245 Hamilton 3240. 4 Definitions
Page 2 of 5 Low Voltage (LV) is voltages not exceeding 1000 V a.c. or 1500 V d.c. and Extra Low Voltage (ELV) is voltages not exceeding 50 V a.c. or 120 V ripple free d.c 5 Under the Electricity Amendment Act 2006 the EWRB has a responsibility to set registration criterion for electrical workers and ensure that all persons applying for electrical registration are competent. To be eligible for EWRB registration as substation maintainer, candidates must complete a competency-based New Zealand qualification for substation maintenance. The New Zealand qualification is based on the requirements of the EWRB Teaching Guidelines. The capstone examinations and practical skill assessments prescribed in the EWRB Teaching Guidelines for substation maintenance are structured around the essential capabilities and critical items that are considered relevant to substation maintenance. 6 References AS/NZS 3000: Electrical Installations (known as the Australian/New Zealand Wiring Rules); Electricity (Safety) Regulations 2010 and amendments; Electricity (Safety) Regulations 2010 - Schedule 2 Electrical codes of practice and official standards; Electricity Act 1992; EWRB Teaching Guidelines available at EWRB - Publications; The New Zealand Electrical Codes of Practice (Ministry of Economic Development, ISSN 0114-0663); Electricity supply industry codes of practice and documented industry procedures include the current version of the Safety Manual Electricity Industry (SM-EI) Wellington: Electricity Engineers Association; and all subsequent amendments and replacements. 8 Candidates are permitted to refer to copies of the above references during assessments.
Page 3 of 5 Outcomes and evidence requirements Outcome 1 Demonstrate knowledge of types of electrical switchboards used in substations. 1.1 The terms used in accordance with current electrical regulations and standards are explained. may include but is not limited to: main switchboard, multiple earth neutral switchboard (MEN switchboard), distribution board, switchgear. 1.2 Layout and circuit wiring diagrams for different types of switchboards are explained in accordance with current regulations and standards. main switchboard, MEN switchboard, distribution board, DC switchboard. Outcome 2 Demonstrate knowledge of installation requirements for electrical switchboards in substations. 2.1 Requirements regarding the construction of switchboards are described in accordance with current regulations and standards. general construction, bars (busbars) and links, control and metering equipment, equipment identification, wiring, access to live parts, fire protective measures. 2.2 Requirements for installation of residual current devices (RCD) are described in accordance with current regulations and standards. Outcome 3 Plan, install and terminate LV and ELV wiring in a substation. Evidence of one LV and one ELV installation is required. 3.1 Wiring plan is drawn for installation of LV and ELV circuits to equipment used in substations. 3.2 Wiring is installed in accordance with current regulations and standards. 3.3 Termination of cables meets the requirements of current regulations and
Page 4 of 5 standards and, where available, installation plans. 3.4 Equipment is installed and terminated. 3.5 Installation is completed to the installation plan and the work meets the requirements of current regulations and standards. Outcome 4 Test an electrical installation for compliance with AS/NZS3000:2007. Evidence of one LV and one ELV installation is required. 4.1 Fittings and devices which may suffer damage due to test voltages are identified, and methods to protect them from damage are demonstrated. 4.2 Electrical tests are carried out without damage to electrical accessories, equipment, and in particular semiconductor devices, due to test voltages. tests insulation resistance, polarity, circuit and earth continuity, bonding, earth resistance, earth loop impedance. 4.3 The correct operation of residual current devices (RCD) is verified either through manufacturer s certification or by means of an RCD tester. 4.4 Results are recorded in accordance with current regulations and standards. 4.5 Results of testing and installation are recorded and certificate of compliance is completed in accordance with current regulations and standards. Planned review date 31 December 2020 Status information and last date for assessment for superseded versions Process Version Date Last Date for Assessment Registration 1 17 March 2016 N/A Consent and Moderation Requirements (CMR) reference 0120 This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do. Please note Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards.
Page 5 of 5 Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards. Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements. Comments on this unit standard Please contact the Infrastructure Industry Training Organisation at qualifications@infrastructureito.org.nz if you wish to suggest changes to the content of this unit standard.