Unit of competency Outline

Date retreived
22/07/2026 9:29 AM AWST

Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.

Maintain power transformer on load tap changers (OLTC)

Maintain power transformer on load tap changers (OLTC)

Unit of competency
National Code
UETTDRSB32
State Code
OBG99
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
25/09/2019
View on TGA
State Implementation and Classification
Approved Date
04/12/2019
Field of Education
031311 - Powerline Installation And Maintenance
Original Release Date
04/12/2019
Nominal Hours
72
Description
This unit involves the skills and knowledge required to maintain power transformer on load tap changers (OLTC) in the electricity supply industry (ESI).
It includes maintaining, repairing and overhauling substation voltage regulating equipment restricted to resistor and reactor type high speed on load tap changers but does not include the main tank tap selector mechanism. It also includes inspecting, recording of information, testing and measuring of associated control circuits, range of acceptance tests required on installed complete units within the parent power transformer, diagnostic and pre-commissioning checks and tests involving tap changers and interpreting these results against agreed specifications.
The application of the skills and knowledge described in this unit may require a licence/registration to practice in the workplace.
Other conditions may apply under State and Territory legislative and regulatory licensing requirement which must be confirmed prior to commencing this unit.
Notes
Elements and Performance Criteria
1 Prepare to maintain voltage regulating equipment (tap changers)
  • 1.1 Work schedules, construction plans, drawings, workplace procedures and material lists are obtained and analysed
  • 1.2 Job requirements and workplace procedures are identified and communicated with relevant personnel
  • 1.3 Hazards are identified, work health and safety (WHS)/occupational health and safety (OHS)risks assessed and control measures prioritised, implemented and monitored in accordance with workplace procedures
  • 1.4 Work is prioritised and sequenced for completion within acceptable timeframes following consultation with relevant personnel and in accordance with workplace procedures
  • 1.5 Risk control measures are identified, prioritised, implemented and evaluated against the work schedule
  • 1.6 Equipment, tools and personal protective equipment (PPE) required for work are identified, obtained and confirmed in working order
  • 1.7 Liaison and communication issues with authorised personnel, authorities, clients and land owners are resolved to facilitate work, as required
  • 1.8 Personnel participating in work are fully briefed and responsibilities confirmed in accordance with workplace procedures
  • 1.9 Worksite is prepared to minimise risk, damage to property, commerce and individuals in accordance with workplace procedures
2 Carry out the maintenance of voltage regulating equipment (tapchangers)
  • 2.1 WHS/OHS, sustainable energy and environmental principles and practices are monitored and actioned to reduce incidents of accidents in accordance with workplace procedures
  • 2.2 Cardiopulmonary resuscitation (CPR), rescue from live electrical apparatus and other related safety procedures are in place in accordance with job requirements and/or workplace procedures
  • 2.3 Safe working documentation is acquired and requirements completed in accordance with workplace procedures
  • 2.4 Requirements for lifting, climbing, working at heights, confined spaces and use of power tools/equipment are followed in accordance with workplace procedures
  • 2.5 Hazard warnings and safety signs are recognised and hazards and assessed WHS/OHS risks are reported to immediate authorised personnel for directions in accordance with workplace procedures
  • 2.6 Oil circuits are isolated and tap changer vessels drained in accordance with workplace and environmental protection procedures
  • 2.7 Tap changer is withdrawn and maintained in accordance with manufacturer instructions and workplace procedures
  • 2.8 Pre-service tests and measurements are conducted in accordance with workplace procedures
  • 2.9 Voltage regulating equipment (tap changers) are safely maintained to ensure completion in agreed timeframes, to quality standards and with minimum waste
  • 2.10 Unplanned events or conditions are responded to in accordance with workplace procedures
3 Complete the maintenance of voltage regulating equipment (tapchangers)
  • 3.1 Completed work is checked against works schedule, construction plans and drawings for compliance and anomalies are reported in accordance with workplace procedures
  • 3.2 Safe working documentation is surrendered and transformer made ready for service
  • 3.3 Worksite is rehabilitated, cleaned up and confirmed safe in accordance with workplace procedures
  • 3.4 Tools, equipment, surplus resources and materials are cleaned, checked and returned to storage in accordance with workplace procedures
  • 3.5 Work records, reports and/or documentation are completed in accordance with workplace procedures and relevant personnel notified
No information
No information
Replaces
State Code National Code Title Type
WD741 UETTDRSB32A Maintain power transformer on load tap changers (OLTC) Unit of competency
Replaced By
State Code National Code Title Type
OEE03 UETDRSB013 Maintain on-load tap changers (OLTC) Unit of competency