Unit of competency Outline

Date retreived
23/07/2026 2:12 AM AWST

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Fault-find, test and rectify AC machines and circuits

Fault-find, test and rectify AC machines and circuits

Unit of competency
National Code
MEM18100
State Code
AUX47
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 locating and rectifying faults in alternating current (AC) machines and circuits.It covers characteristics including their construction and operating principles. It also includes their application, control and protection methods, reversal of rotation and the requirements to limit starting current as well as skills in testing and fault finding, including abnormal operating conditions.This unit covers the skills and knowledge required to meet the Electrical Regulatory Authorities Council (ERAC).Essential Performance Capabilities (EPCs):EPC 12 - Demonstrate the rationale and operating principles and characteristics of three phase induction motors and generators. Describe AS/NZS 3000 requirements and knowledge of local Supply Authority requirements for three phase motor installations and starters.EPC 14 - Demonstrate knowledge of possible causes of malfunction of three phase induction motors and demonstrate the tests required for diagnosing faults.EPC 15 - Describe the operating principles, characteristics, and suitability of typical control methods for single-phase motors and their key components.AndEssential Performance Capability (EPC) classified as ‘critical’:EPC 13 - Demonstrate a knowledge of methods of electric motor selection, starting, connection and protection.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 on AC machines and associated control circuits
  • 2.1 Obtain all necessary tools, equipment and testing instruments needed to conduct fault diagnosis of AC machines and circuits
  • 2.2 Isolate and tag circuits and equipment in accordance with procedures
3. Fault find AC machines and associated control circuits
  • 3.1 Apply diagnostic techniques to solve problems in AC machines and their associated control circuits, including the use of specialised test equipment
  • 3.2 Test single and three-phase windings for continuity and insulation resistance between windings and to earth with appropriate test equipment
  • 3.3 Dismantle and reassemble AC machine using appropriate fitting techniques, equipment and tools in accordance with specifications and procedures, if required
  • 3.4 Remove/repair/replace faulty components/circuits in accordance with manufacturer specifications and regulatory requirements
  • 3.5 Test AC machine/circuit to ensure functionality in accordance with specifications
  • 3.6 Document all necessary repairs in accordance with SOPs
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