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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Explain hazards and isolation procedures associated with live electrical components
   • Effects of electricity on the human body are outlined
2. Procedures to be taken in the event of a person suffering an electric shock are clarified
3. Correct procedure for isolating an electrical circuit is clarified
4. Electrical hazards in a vessel at sea or port are identified
5. Explain principles of power generation and transmission in alternating current (AC) and direct current (DC) circuits
   • Excitation methods used to produce AC and DC voltages are outlined
6. Basic voltage control of generated AC voltages is outlined
7. Outline key features of basic electrical diagrams used on vessels
   • Types of diagrams used to depict electrical systems on ships are outlined
8. Electrical symbols used in basic electrical diagrams are identified
9. Electrical devices used in basic electrical circuits are clarified
10. Use common electrical measuring and testing instruments
    • Different types of multimeters are used appropriately
11. Functions of insulation and ‘tong’ testers are explained
12. Safety requirements when using test equipment are applied
13. Rectify basic electrical faults
    • Fault situation is determined by appropriate questioning of client or operator
14. Safe working practices are demonstrated when carrying out fault-finding work
15. Basic common faults of equipment and techniques used to find faults are outlined
16. Knowledge of various types of basic common faults of circuits and techniques is used to find faults
17. Basic common faults in electrical equipment are identified and rectified
18. Outline basic components and layout of a marine electrical switchboard
    • Layout of a typical three-wire insulated electrical system is sketched
19. Interconnections between main switchboard, emergency switchboard and shore supply are explained
20. Procedure for changing over to emergency switchboard for testing or during loss of mains power is outlined
21. Safety features on a typical marine switchboard are identified
22. Explain operation of shipboard alternators
    • Types and construction methods of alternators used on a marine vessel are outlined
23. Principles of operation of a marine type alternator are outlined
24. Relationship is shown between voltage and speed in regulation of alternator
25. Operational characteristics of a marine alternator are outlined
26. Excitation and automatic voltage regulation systems used with marine alternators are clarified
27. Explain procedures for paralleling of alternators
    • Process of measuring voltage, frequency and phase angle is outlined
28. Automatic and manual procedures for synchronising and paralleling marine alternators, including machines of different capacities, are clarified
29. How two machines can be adjusted to share kilovolt-ampere reactive (kVAR) and kilowatt (kW) loads is confirmed
30. Process of removing an alternator from the bus is outlined

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria on at least one occasion and include: assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices explaining basic principles of alternators, generators and control systems identifying and interpreting numerical and graphical information in electrical diagrams and specifications for a commercial vessel identifying and suggesting ways of rectifying electrical hazards and emergency situations on a vessel identifying methods, procedures and materials needed for operating, maintaining and repairing basic marine electrical systems imparting knowledge and ideas through verbal, written and visual means providing accurate and reliable information providing appropriate level of detail in responses reading and interpreting written information related to electrical circuitry and components on commercial vessels using electrical measuring and testing instruments.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of: alternating current (AC)/direct current (DC) voltage alternators: characteristics construction synchronised operation automatic control devices, including: process control system control electrical: measuring and testing instruments safe working practices symbols, basic electrical diagrams/circuits electrical hazards, including: electric shock electrical fire moving and rotating electrical equipment non-compliance with safe working procedures over-speed of electrical machinery poor housekeeping procedures using equipment beyond safe working limits electrical motors high voltage (HV) marine electrical systems, including: earthing instrumentation power distribution boards switchboards monitoring systems phase angle, power factor and current flow procedures for dealing with hazards and emergencies protective devices resistance, inductance and capacitance switchboards and protection, including: equipment removal purpose testing and maintenance work health and safety (WHS)/occupational health and safety (OHS) legislation and policies.

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