Elements and Performance Criteria
- Explain hazards and isolation procedures associated with live electrical components
- Explain basic operation of and hazards associated with marine high voltage installations
- Functional and operational requirements for a marine high voltage system are detailed
- Safety procedures required when working in high voltage environments are outlined
- Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage switchgear of various types is outlined
- Explain principles of power generation and transmission in AC and DC circuits
- Outline key features of basic electrical diagrams used on vessels
- Use common electrical measuring and testing instruments
- Rectify basic electrical faults
- Fault situation is determined by appropriate questioning of client or operator
- Safe working practices are demonstrated when carrying out fault-finding work
- Basic common faults of equipment and techniques used to find faults are outlined
- Knowledge of various types of basic common faults of circuits and techniques is used to find faults
- Basic common faults in electrical equipment are identified and rectified
- Outline basic components and layout of a marine electrical switchboard
- Layout of a typical three wire insulated electrical system is sketched
- Interconnections between main switchboard, emergency switchboard and shore supply are explained
- Procedure for changing over to emergency switchboard for testing or during loss of mains power is outlined
- Safety features on a typical marine switchboard are identified
- Explain operation of shipboard alternators
- Types and construction methods of alternators used on a marine vessel are outlined
- Principles of operation of a marine type alternator are outlined
- Relationship is shown between voltage and speed in regulation of alternator
- Operational characteristics of a marine alternator are outlined
- Excitation and automatic voltage regulation systems used with marine alternators are clarified
- Explain procedures for paralleling of alternators
- Process of measuring voltage, frequency and phase angle is outlined
- Automatic and manual procedures for synchronising and paralleling marine alternators, including machines of different capacities are clarified
- How two machines can be adjusted to share kVAR and kW loads is confirmed
- Process of removing an alternator from the bus is outlined