Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Explain hazards and isolation procedures associated with live electrical components

1.1

Effects of electricity on the human body are outlined

1.2

Procedure to be taken in the event of a person suffering an electric shock is clarified

1.3

Correct procedure for isolating an electrical circuit is clarified

1.4

Electrical hazards in a vessel at sea or port are identified

2

Explain basic operation of and hazards associated with marine high voltage installations

2.1

Functional and operational requirements for a marine high voltage system are detailed

2.2

Safety procedures required when working in high voltage environments are outlined

2.3

Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage switchgear of various types is outlined

3

Explain principles of power generation and transmission in AC and DC circuits

3.1

Excitation methods used to produce alternating current (AC) and direct current (DC) voltages are outlined

3.2

Basic voltage control of generated AC voltages is outlined

4

Outline key features of basic electrical diagrams used on vessels

4.1

Types of diagrams used to depict electrical systems on ships are outlined

4.2

Electrical symbols used in basic electrical diagrams are identified

4.3

Electrical devices used in basic electrical circuits are clarified

5

Use common electrical measuring and testing instruments

5.1

Different types of multimeters are used appropriately

5.2

Functions of insulation and ‘tong’ testers are explained

5.3

Safety requirements when using test equipment are applied

6

Rectify basic electrical faults

6.1

Fault situation is determined by appropriate questioning of client or operator

6.2

Safe working practices are demonstrated when carrying out fault-finding work

6.3

Basic common faults of equipment and techniques used to find faults are outlined

6.4

Knowledge of various types of basic common faults of circuits and techniques is used to find faults

6.5

Basic common faults in electrical equipment are identified and rectified

7

Outline basic components and layout of a marine electrical switchboard

7.1

Layout of a typical three wire insulated electrical system is sketched

7.2

Interconnections between main switchboard, emergency switchboard and shore supply are explained

7.3

Procedure for changing over to emergency switchboard for testing or during loss of mains power is outlined

7.4

Safety features on a typical marine switchboard are identified

8

Explain operation of shipboard alternators

8.1

Types and construction methods of alternators used on a marine vessel are outlined

8.2

Principles of operation of a marine type alternator are outlined

8.3

Relationship is shown between voltage and speed in regulation of alternator

8.4

Operational characteristics of a marine alternator are outlined

8.5

Excitation and automatic voltage regulation systems used with marine alternators are clarified

9

Explain procedures for paralleling of alternators

9.1

Process of measuring voltage, frequency and phase angle is outlined

9.2

Automatic and manual procedures for synchronising and paralleling marine alternators, including machines of different capacities are clarified

9.3

How two machines can be adjusted to share kVAR and kW loads is confirmed

9.4

Process of removing an alternator from the bus is outlined