Carry out acceptance and maintenance tests on distance protection relays

Transcription

1 Page 1 of 5 Carry out acceptance and maintenance tests on distance protection relays Level 5 Credits 4 Purpose People credited with this unit standard are able to: prepare for acceptance and maintenance tests on distance protection relays; set up test equipment; carry out acceptance and maintenance tests; interpret test results and complete compliance documentation; and return equipment to service. Subfield Domain Status Electricity Supply Electricity Supply - Testing Registered Status date 16 April 2010 Date version published 16 April 2010 Planned review date 31 December 2014 Entry information Prerequisites: Unit 14280, Carry out acceptance and maintenance tests on single input protection relays; Unit 14297, Carry out tests on multiple input protection systems; Unit 14287, Use and maintain test instruments used within the high voltage electrical industry; Unit 14700, Apply and remove safety measures in an electricity supply environment; Unit 14701, Manage electricity supply work control systems; Unit 12296, Apply earths to and remove earths from electrical conductors, plant and equipment; or demonstrate equivalent knowledge and skills. Core electrical theory is essential knowledge underpinning the performances required by this unit standard. Accreditation Standard setting body (SSB) Evaluation of documentation and visit by NZQA and industry. Electricity Supply Industry Training Organisation Accreditation and Moderation Action Plan (AMAP) reference 0120 This AMAP can be accessed at

2 Page 2 of 5 Special notes 1 This unit standard can be assessed in a workplace environment, or in a training or educational environment if simulated equipment response and examples are able to be provided, or in a combination of both environments. 2 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 Electricity supply industry codes of practice and documented industry procedures include the Safety Manual Electricity Industry (SM-EI) 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 The phrase in accordance with industry requirements is implicit in all elements and performance criteria in this unit standard. 4 Industry requirements include all asset owner requirements; manufacturers specifications; and enterprise requirements which cover the documented workplace policies, procedures, specifications, business, and quality management requirements relevant to the workplace in which assessment is carried out. 5 The range of this unit standard is limited to carrying out acceptance and maintenance tests on transmission line protection relays normally, initially, applied in a test laboratory, and for maintenance tests applied at electricity supply Substations. 6 The following abbreviation relates to this unit standard: DCEF = Directional comparison earth fault. Elements and performance criteria Element 1 Prepare for acceptance and maintenance tests on distance protection relays. 1.1 The relevant equipment technical specifications for distance protection relays are selected. may include but are not limited to specifications for the following relay types or similar Optimho, REL 100, RYZFB, RYZOE, Quadramho, THR3PE1, THR4PE2, SEL-321, RAZOA and include electro-mechanical and solid state relays, travelling wave type, impedance type, step time distance type.

3 1.2 The relay test specifications and performance standards are selected version 3 Page 3 of 5 may include but are not limited to performance characteristics, pick-up, drop-off, polar plots, delay time, definite time, circuit breaker failure, distance relays, inter-tripping, blocking, acceleration, DCEF. 1.3 The required test circuit and inspection requirements are identified to meet client testing requirements. may include but is not limited to test equipment necessary for carrying out the selected tests as, for example performance characteristics, pick-up, drop-off, polar plots, delay time, definite time, circuit breaker failure, distance relays, inter tripping, blocking, acceleration, DCEF. 1.4 The extent of main equipment to be released from service is identified and the equipment release requested for work access. may include but is not limited to completing all requests in a timely and correct manner. Element 2 Set up test equipment. 2.1 Access Permit or its approved equivalent is obtained and the safe work zone identified. may include but is not limited to placing boundary markers around the work area, identification of authorisation safety features. 2.2 The selected circuit and test equipment is assembled ready for testing. may include but is not limited to manufacturer guidelines, client operating and maintenance standards and test procedures, inspection of test leads for damage. 2.3 The selected test and inspection procedures are available for use during testing. may include but is not limited to previous test results, history cards, manufacturer s information and manuals.

4 Page 4 of The status of the test instrument calibrations is verified as required by test procedures. may include but is not limited to calibration certificates are valid, accuracy of settings. 2.5 Any hazards associated with the testing are identified and safety measures are prepared and implemented. may include but is not limited to capacitors, at charge, auxiliary services, risk of trip for other equipment, alarms. Element 3 Carry out acceptance and maintenance tests. 3.1 The tests are carried out using the selected procedures or as specified by the client. may include but are not limited to manufacture and client test procedures for the test examples listed performance characteristics, pick-up, drop-off, polar plots, delay time, definite time, circuit breaker failure, distance relays, inter-tripping, blocking, acceleration, DCEF; evidence required must be able to carry out tests on three of the relay types listed and types of operating methods. 3.2 The results of the tests and inspections are accurately recorded as required by client documentation. Element 4 Interpret test results and complete compliance documentation. 4.1 The documented test results are interpreted for compliance with the standard required. may include but are not limited to reference to maker s requirements, client standards, previous test results records, ensure results are within given specifications. 4.2 Compliance or non-compliance documentation is completed for each unit tested. may include but is not limited to manufacturer s requirements, client documentation requirements, recommendations for remedial work, record of adjustments made.

5 Page 5 of 5 Element 5 Return equipment to service. 5.1 The equipment being tested is safely returned to service. may include but is not limited to ensuring all test equipment has been removed; all re-connection work is completed, checked, and secure; all equipment is left in a state ready for service; the equipment is returned to service without incident. 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.