Elements and Performance Criteria
- Analyse common faults in shipboard electrical machinery
- Effects and ways of detecting earth on 3 wire insulated and 4 wire earthed neutral systems are explained
- Effects of short circuits and operation of discrimination protection are explained
- Symptoms and effects of ‘light’ and ‘heavy’ short circuits on components and circuits are compared
- Effects of open circuits on systems and components transformers are analysed
- Causes and effects of ‘hot spots’ in circuits are identified
- Cause and effects of static electricity on shafting and when cleaning tanks are identified
- Perform fault- finding on electrical circuits
- Safe procedure for determining insulation resistance of a 3phase motor or alternator including protection of solidstate components and selection of suitable minimum insulation for the component is applied
- Procedure for safely drying out an electrical machine with a low IR is outlined
- Open circuit in a 3phase motor is safely tested
- Procedure for testing internal short circuit in a 3phase motor is clarified
- Analyse complex shipboard switchboard layouts
- Switchboard layouts are interpreted
- The effects and indications of earths on the system including intermittent and multi earths are explained
- Safe procedure for locating earths on main and low voltage circuits including 24 V system is outlined
- Operation of preferential tripping arrangements for overload protection is explained
- Relationship between main and emergency switchboards is explained
- Different methods of start up after black outs are outlined
- Explain electrical safety procedures for ship and shore personnel
- Potential problems associated with shore maintenance personnel working on ship electrical equipment are identified
- Safe procedure of isolating electrical machinery for repair or maintenance is applied
- Safe method of working on live electrical circuitry for purpose of repair or maintenance is explained
- Problems associated with shipboard electrical fires are explained
- Safe procedures for fighting shipboard electrical fires including fires in switchboards are clarified
- Synchronise, parallel and load share alternators on manual and auto modes
- Process of manually synchronising alternator and sharing kW and kVAR loading under all loading conditions is explained
- Process of starting, testing and where applicable, of transferring emergency generator power on to main board, is explained
- Operation of synchronising lights, synchroscope and all meters associated with synchronising is outlined
- Operation of AVR and prime mover governor with respect to synchronising is outlined and how these can be adjusted at set points is explained
- Examine operation, construction and maintenance of circuit breakers
- Features and applications of different types of circuit breakers are differentiated
- Closing and opening systems of circuit breakers are explained
- Arc extinguishing systems are explained
- Method for accessing an air circuit breaker for inspection is analysed
- Function and operation of protection devices associated with air circuit breaker and molded case circuit breaker are examined
- Analyse function of emergency battery systems
- Different types and characteristics of batteries used for emergency supplies are identified
- Methods of battery charging and ways in which charge condition of the battery can be determined are explained
- Requirements of emergency supply and how transfer can occur without adversely affecting solid state components are explained
- Safety hazards associated with batteries, and procedures to be adopted to minimise explosion and short circuits are appraised
- Explain hazards associated with marine high voltage installations
- Functional and operational requirements for a marine high voltage system are outlined
- High voltage marine installations are identified
- Design features of high voltage installations are explained
- Risks and safety procedures associated with working in high voltage environments are identified
- Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage installation is outlined