Power Unit 075. Maintain Substation Circuit Breakers

Transcription

1 Power Unit 075 Maintain Substation Circuit Breakers The specification details the required skills, knowledge and behaviours to establish competence to carry out the maintenance of high voltage power circuit breakers. The specification details the requirements for THREE separate categories. Candidates may be assessed and receive registration for any ONE or a COMBINATION of the following: 1. Transmission Circuit Breakers 2. Primary Circuit Breakers 3. Distribution Circuit Breakers (up to 20 kv) This specification details the minimum skills, knowledge and behaviours that would be required by a candidate to be assessed as competent. This does not preclude employers adding to the skills and knowledge detailed by the specification in their own training programmes. What does competence look like? CBM1 Being able to confidently use tools and equipment to carry out a range of maintenance procedures on circuit breakers in a substation environment in accordance with company procedures. CBM2 Demonstrating a safety conscious approach to the control of hazards associated with the activity whilst working and communicating effectively with other team members to achieve tasks. What do I need to take this module? Candidates to be assessed as competent in this skill area shall have completed the modules shown below or have evidence demonstrating an equivalent level of competence. 1. SHEA Power (Revised Version) providing basic HS&E awareness and an introduction to specific HS&E factors relating to the power sector 2. BESC / AME Substations establishing the competence to enter, move around and exit a substation work area in a safe manner 2017 Energy and Utility Skills Group Page 1

2 Performance Criteria To be assessed as competent you must be able to: General Requirements P1. Identify the substation and the plant / apparatus to be maintained using available information in accordance with company procedures P2. Select, inspect and wear the PPE required to carry out the work activity P3. Carry out a site specific risk assessment of the work area, identifying the hazards and the control measures required (requirements included in SHEA Power and BESC / AME Substations) P4. Apply and adhere to the control measures necessary to meet safety requirements for the work activity e.g. safety documentation, work instructions and method statements P5. Identify and comply with demarcation arrangements for the work area in accordance with company procedures (where applicable) P6. Carry out a pre use inspection of the tools and equipment to be used, checking condition and service information P7. Carry out the maintenance procedures on circuit breakers in accordance with manufacturers specifications and company procedures P8. Record / report results of the maintenance operation/s in accordance with company procedures P9. Ensure hazardous and non-hazardous waste materials are dealt with in accordance with company procedures and statutory regulations P10. Report and record incidents / defects in accordance with company procedures P11. Store tools and equipment safely and securely and leave the substation work area in a safe and secure condition in accordance with company procedures Task Specific In addition, for EACH category to be taken you must be able to: Category 1 Transmission Circuit Breakers P12. Carry out maintenance activities on ALL of the following circuit breaker types: a) Air Blast b) Oil c) SF6 P13. Carry out ALL of the following testing procedures: a) Insulation medium tests Oil, SF6 and Air (to include dew point) b) Insulation and continuity tests (secondary wiring) c) Low resistance testing d) Timing and operational tests 2017 Energy and Utility Skills Group Page 2

3 Category 2 Primary Circuit Breakers P14. Carry out maintenance procedures on a minimum of TWO of the following circuit breakers. ONE of which MUST include an oil circuit breaker: a) Oil b) SF6 c) Vacuum P15. Carry out maintenance procedures on ALL of the following circuit breaker components: a) Electro-mechanical components e.g. contacts, springs, braids b) Arc disruption devices c) Phase barriers P16. Carry out ALL of the following testing procedures: a) Insulation medium test b) Insulation resistance test c) SF6 pressure check & leak detection d) Ductor testing e) Timing test Category 3 distribution Circuit Breakers P17. Carry out maintenance procedures on a minimum of TWO of the following circuit breakers. ONE of which MUST include an oil circuit breaker: a) Oil b) SF6 c) Vacuum P18. Carry out maintenance procedures on ALL of the following circuit breaker components: a) Electro-mechanical components e.g. contacts, springs, braids b) Arc disruption devices c) Phase barriers P19. Carry out ALL of the following testing procedures: a) Insulation medium test b) Insulation resistance test c) SF6 pressure check & leak detection d) Ductor testing e) Timing test 2017 Energy and Utility Skills Group Page 3

4 Knowledge and Understanding To achieve any of the categories, you will need to know and understand: General Requirements K1. The principles of Health, Safety and Environmental legislation in relation to work on substation plant and apparatus e.g. Electricity at Work Regulations 1989 K2. The organisation s safety rules, policies and procedures relating to work on or near substation plant / apparatus e.g. safety documentation, demarcation K3. How to identify the substation and the plant / apparatus to be worked on K4. The hazards associated with work on or near substation apparatus and how to deal with them e.g. exposed busbars, overhead conductors / structures K5. The dangers of electricity and how an electric shock can be received including: direct contact, infringing safety distances, induced voltage and arcing K6. The electrical safety distances which must be maintained at differing voltages K7. The appropriate PPE for work in substations and how to inspect, use and maintain it K8. How to carry out a site specific risk assessment and identify workplace hazards K9. How to enter, exit and move around a substation work area in a safe manner and (where applicable) use and comply with demarcation arrangements K10. The purpose and method of earthing substations and how to identify inadequate earthing K11. The effect of adverse weather conditions on sub-station work activities K12. How to update, report and record information in accordance with company procedures e.g. maintenance reports, test results, acts of vandalism / terrorism K13. How to use, handle and dispose of hazardous and non-hazardous waste materials K14. How to respond in the event of emergency situations in the work environment K15. How to leave the work area and substation in a safe and secure condition. e.g. access equipment secured, demarcation / screening removed, gates locked Task Specific In addition, for EACH category to be taken you need to know and understand: Category 1 Transmission Circuit Breaker K16. The function and operating principles of transmission circuit breakers K17. The function and operating principles of transmission circuit breaker ancillary equipment K18. How to carry out maintenance activities in accordance with company procedures on transmission circuit breaker plant and ancillary equipment K19. How to carry out testing procedures on transmission circuit breakers 2017 Energy and Utility Skills Group Page 4

5 K20. How to interpret the results of testing procedures carried out on transmission circuit breakers K21. How to interpret and comply with company standards, specifications and manufacturers instructions K22. The hazards associated with work on transmission circuit breakers and its associated plant and equipment Category 2 Primary Circuit Breakers K23. The function and operating principles of primary circuit breakers K24. The function and operating principles of primary circuit breakers ancillary equipment K25. The function and operating principles of primary circuit breakers protection equipment K26. How to carry out maintenance activities in accordance with company procedures on primary circuit breakers, plant and ancillary equipment K27. How to carry out testing procedures on primary circuit breakers K28. How to interpret the results of testing procedures carried out on primary circuit breakers K29. How to interpret and comply with company standards, specifications and manufacturers instructions K30. The hazards associated with work on primary circuit breakers and its associated plant and equipment Category 3 Distribution Circuit Breakers (up to 20kV) K31. The function and operating principles of distribution circuit breakers K32. The function and operating principles of distribution circuit breakers ancillary equipment K33. The function and operating principles of distribution circuit breakers protection equipment K34. How to carry out maintenance activities on circuit breakers in accordance with company procedures K35. The methods and purpose of carrying out maintenance testing procedures including - Insulation medium, insulation resistance, SF6 pressure check & leak detection, Ductor testing and timing tests K36. The hazards associated with work on distribution circuit breakers and its associated plant and equipment 2017 Energy and Utility Skills Group Page 5