Unit of competency Outline

Date retreived
23/07/2026 6:54 AM AWST

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Fault-find, test and rectify single and three-phase transformers

Fault-find, test and rectify single and three-phase transformers

Unit of competency
National Code
MEM18102
State Code
AUX40
TGA Status
Current
DTWD Status
Approved
Current Release Number
3.00
Current Release Date
26/06/2019
View on TGA
State Implementation and Classification
Approved Date
16/10/2015
Field of Education
031313 - Electrical Fitting, Electrical Mechanics
Original Release Date
16/10/2015
Nominal Hours
36
Description
This unit of competency has been developed for Engineering Tradesperson - industrial electrician apprenticeship training and the recognition of trade-level skills in fault finding and rectifying single and three-phase transformers. It includes the operating principles of transformers, their construction and open circuit and full load characteristics; types of transformers used in transmission and distribution systems, appliances and welding machines; hazards associated with step and touch voltages, induced voltages and stored energy particularly with high voltages; earthing requirements to limit the rise of touch voltage; safe working procedures for connecting and testing and fault finding transformers.This unit covers the skills and knowledge required to meet the Electrical Regulatory Authorities Council (ERAC).Essential Performance Capabilities (EPCs):EPC 18 - Describe the basic construction, principles of operation, and typical applications of the main types of transformers.AndEssential Performance Capabilities (EPCs) classified as ‘critical’:EPC 19 - List the key safety issues of various types of transformers, including AS/NZS 3000 requirements.EPC 48 - Demonstrate knowledge and understanding of the significant dangers of High Voltage equipment and distribution systems.Some jurisdictions require the holder of this unit to be licensed or certified and users should check with the relevant authorities.Band: AUnit Weight: 4
Notes
Elements and Performance Criteria
1. Determine job requirements
  • 1.1 Follow standard operating procedures (SOPs)
  • 1.2 Comply with work health and safety (WHS) requirements at all times, including appropriate risk control measures
  • 1.3 Use appropriate personal protective equipment (PPE) in accordance with SOPs
  • 1.4 Research the nature of the fault through checking of documentation and/or consultation with appropriate person
2. Prepare to fault find single and three-phase transformers and associated circuits
  • 2.1 Obtain all necessary tools, equipment and testing instruments needed to conduct fault diagnosis of single and three-phase transformers and circuits
  • 2.2 Isolate and tag circuits and equipment in accordance with procedures
3. Fault find single and three-phase transformers and associated circuits
  • 3.1 Apply diagnostic techniques to fault find single and three-phase transformers and associated circuits using appropriate test equipment
  • 3.2 Remove/repair/replace faulty components/circuits in accordance with manufacturer specifications and regulatory requirements
  • 3.3 Test single and three-phase transformers associated circuits to ensure functionality in accordance with specifications
  • 3.4 Carry out routine maintenance on transformers, including oil testing, silica gel change and bushing repairs, where applicable
  • 3.5 Document all necessary repairs in accordance with SOPs
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