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NZQA registered unit standard SGOJ78 version 5 Page 1 of 4 Title Demonstrate knowledge of electric switchboard testing Level 4 Purpose Credits 3 This unit standard is intended for the training and assessment of people engaged in the manufacture of electric switchboards and covers electric switchboard testing theory. People credited with this unit standard are able to: – describe switchboard test equipment; – demonstrate knowledge of switchboard inspection and testing methods; – demonstrate knowledge of anticipated results of switchboard tests; and – explain the application of thermal imaging to switchboard testing. Classification Electrical Engineering > Electric Switchboards Available grade Achieved Explanatory notes 1 This unit can be used for learning and assessment for off-job and/or on-job 2 References Electricity Act; Electricity (Safety) Regulations; Health and Safety in Employment Act and associated regulations; Accident Compensation Act; AS/NZS 3000:2007, Electrical installations (known as the Australian/New Zealand Wiring Rules), including Amendment 1; IEC Standard 61439 (known as the International Electrotechnical Commission); New Zealand Electrical Codes of Practice (NZECP), ISSN 0114-0663 (available from the Ministry of Business, Innovation and Employment); and all subsequent amendments and replacements. 3 Definitions CT – current transformers. HV – high voltage. Industry practice – practice used and recommended by organisations involved in the electrotechnology industry. VT – voltage transformers. 4 Range All knowledge demonstrated is to be conducted in accordance with applicable The Skills Organisation SSB Code 100401 New Zealand Qualifications Authority 2017 NZQA registered unit standard SGOJ78 version 5 Page 2 of 4 specifications, accepted industry practices and requirements, documented enterprise, legislative and/or regulatory requirements, and local bylaws. Outcomes and evidence requirements Outcome 1 Describe switchboard test equipment. Range test equipment includes – insulation tester, HV tester, current injection test set, ductor set, CT, polarity test set. Evidence of five instruments is required. Evidence requirements 1.1 Explain the purpose of each piece of equipment. 1.2 Apply the relevant method for each piece of equipment and explain the relation to specific test requirements. 1.3 Demonstrate calibration needs and safety precautions appropriate to the use of each piece of equipment. Outcome 2 Complete switchboard inspection and demonstrate testing methods. Evidence requirements 2.1 Describe familiar and unfamiliar sequence of inspections and tests, which provides for efficiency and safety. Range inspections – layout, busbars; tests – CT, VT, wiring, insulation, potential, functional. 2.2 CT tests, polarity testing, and current injection testing are described in terms of procedure and instruments used. 2.3 The test voltages to be used for common nominal switchboard voltages are stated. 2.4 One method of systematically testing the operating voltages of all circuits in the switchboard is explained in accordance with industry practice. 2.5 One method of calibrating and testing circuit breakers is described in accordance with industry practice. 2.6 The safe working clearances for high-voltage testing and operational testing are stated in accordance with industry practice. Outcome 3 The Skills Organisation SSB Code 100401 New Zealand Qualifications Authority 2017 NZQA registered unit standard SGOJ78 version 5 Page 3 of 4 Demonstrate knowledge of anticipated results of switchboard tests. Evidence requirements 3.1 Typical tolerances for test results are stated. 3.2 Flashover and/or puncture occurring during insulation and HV tests are explained. 3.3 Reasons for acceptable pass/fail criteria for insulation tests carried out at the test voltages defined in IEC 61439 and the relevant tables. 3.4 Primary VT ratio and its relevance to test results are described. Outcome 4 Explain the application of thermal imaging to switchboard testing. Evidence requirements 4.1 Explain thermal imaging and the operation and use of thermal imaging equipment. 4.2 Thermal imaging is explained in terms of how it detects hot spots on the switchboard. 4.3 Explain the types of fault that may be detected with thermal imaging technology. Planned review date 31 December 2014 Status information and last date for assessment for superseded versions Process Version Date Last Date for Assessment Registration 1 31 August 1998 31 December 2013 Revision 2 12 March 2002 31 December 2013 Review 3 20 March 2008 N/A Rollover and Revision 4 15 March 2012 N/A Revision 5 15 January 2014 N/A Consent and Moderation Requirements (CMR) reference 0003 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. The Skills Organisation SSB Code 100401 New Zealand Qualifications Authority 2017 NZQA registered unit standard SGOJ78 version 5 Page 4 of 4 Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards. 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 Skills Organisation [email protected] if you wish to suggest changes to the content of this unit standard. The Skills Organisation SSB Code 100401 New Zealand Qualifications Authority 2017