19318 version 3 Page 1 of 4 Install and commission electricity current transformer metering Level 5 Credits 10 Purpose People credited with this unit standard are able to: demonstrate knowledge of the design and application of current transformer (CT) metering; determine CT loadings; determine CT installation integrity; install and commission CT metering equipment; and report CT installation and commissioning results. Subfield Electricity Supply Domain Electricity Supply - Metering Status Registered Status date 27 May 2002 Date version published 23 April 2007 Planned review date 31 December 2012 Entry information Recommended: Unit 19313, Demonstrate knowledge of electricity metering systems and installations, or demonstrate equivalent knowledge and skills. Accreditation Evaluation of documentation and visit by NZQA and industry. Standard setting body (SSB) Electricity Supply Industry Training Organisation Accreditation and Moderation Action Plan (AMAP) reference 0120 This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do. Special notes 1 This unit standard is intended for, but not restricted to, workplace assessment. The range statements across the unit standard can be applied according to industry specific equipment, procedures, and processes. 2 Safety of personnel and plant must be a priority throughout the assessment. If the safety requirements are not met the assessment must stop and the candidate will be assessed as not yet competent. New Zealand Qualifications Authority 2016 19318 version 3 Page 2 of 4 3 Performance and work practices in relation to the elements and performance criteria must comply with all current legislation, especially the Electricity Act 1992, and any regulations and codes of practice recognised under that statute; the Health and Safety in Employment Act 1992; and the Resource Management Act 1991. Electricity supply industry codes of practice and documented industry procedures include the Safety Manual – Electricity Industry (SM-EI) (2004) Wellington: Electricity Engineers’ Association. A full list of current legislation and industry codes is available from the Electricity Supply Industry Training Organisation, PO Box 1245, Hamilton. 4 ‘Industry requirements’ include all industry and workplace documented policies, procedures, specifications, business, and quality management requirements relevant to the workplace in which assessment is carried out. 5 Practical exercises should be used for training and assessment wherever possible. Elements and performance criteria Element 1 Demonstrate knowledge of the design and application of CT metering. Performance criteria 1.1 The types of CT are described in accordance with industry requirements. Range 1.2 The design of a CT is described in accordance with industry requirements. Range 1.3 includes but is not limited to – bar, ring, single ratio, multi ratio. may include but is not limited to – comparison of 1 amp and 5 amp secondaries VA output, burden ratings, class of operation. Multipliers and compensation for CT ratios are described in accordance with industry requirements. Range includes but is not limited to – criteria for current range selection, matching CT to load, compensation application. 1.4 Open circuit dangers and precautions for CT installations are identified and described in accordance with industry requirements. 1.5 Types of metering connections are described. Range meter. includes but is not limited to – two element meter, three element New Zealand Qualifications Authority 2016 19318 version 3 Page 3 of 4 Element 2 Determine CT loadings. Performance criteria 2.1 Ratios are selected in accordance with industry requirements. Range 2.2 includes but is not limited to – basis for CT matching to loads. Class of operation is determined in accordance with industry requirements. Range includes but is not limited to – selection of CT class to suit metering accuracy. Element 3 Determine CT installation integrity. Performance criteria 3.1 Required loadings are captured in accordance with industry requirements. 3.2 Equipment mounting and positioning is checked in accordance with industry requirements. Range 3.3 Access to equipment is checked in accordance with industry requirements. Range 3.4 includes but is not limited to – secure mountings, electrical clearances terminal safeguarding and shrouds. includes but is not limited to – sealing, prevention of unauthorised access. CT installation integrity is determined and recorded in accordance with industry requirements. Range may include but is not limited to – safety, design criteria upheld, documentation, insulation determination, winding resistance, earthing requirements. Element 4 Install and commission CT metering equipment. Performance criteria 4.1 CT metering equipment is installed in accordance with industry requirements. Range may include but is not limited to – wiring compliance, earthing, mounting, CT classes, burden measurements, ratio selection. New Zealand Qualifications Authority 2016 19318 version 3 Page 4 of 4 4.2 CT metering equipment is commissioned in accordance with industry requirements. Range includes but is not limited to – polarity tests, burden measurements, prevailing load tests. Element 5 Report CT installation and commissioning results. Range may include but is not limited to – job sheet, installation reports and results. Performance criteria 5.1 Reported information is completed and processed in accordance with industry requirements. 5.2 Installation and commissioning information is recorded in the required format and filed within the scheduled time-frame in accordance with industry requirements. 5.3 Further action required for plant and equipment is identified, recorded, and communicated to appropriate personnel in accordance with industry requirements. Please note Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards. Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards. Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP 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 Electricity Supply Industry Training Organisation info@esito.org.nz if you wish to suggest changes to the content of this unit standard. New Zealand Qualifications Authority 2016