Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. |
1 | Analyse common faults in shipboard electrical machinery | 1.1 | Effects and ways of detecting earth on 3 wire insulated and 4 wire earthed neutral systems are explained |
1.2 | Effects of short circuits and operation of discrimination protection are explained |
1.3 | Symptoms and effects of ‘light’ and ‘heavy’ short circuits on components and circuits are compared |
1.4 | Effects of open circuits on systems and components transformers are analysed |
1.5 | Causes and effects of ‘hot spots’ in circuits are identified |
1.6 | Cause and effects of static electricity on shafting and when cleaning tanks are identified |
2 | Perform fault- finding on electrical circuits | 2.1 | 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 |
2.2 | Procedure for safely drying out an electrical machine with a low IR is outlined |
2.3 | Open circuit in a 3phase motor is safely tested |
2.4 | Procedure for testing internal short circuit in a 3phase motor is clarified |
3 | Analyse complex shipboard switchboard layouts | 3.1 | Switchboard layouts are interpreted |
3.2 | The effects and indications of earths on the system including intermittent and multi earths are explained |
3.3 | Safe procedure for locating earths on main and low voltage circuits including 24 V system is outlined |
3.4 | Operation of preferential tripping arrangements for overload protection is explained |
3.5 | Relationship between main and emergency switchboards is explained |
3.6 | Different methods of start up after black outs are outlined |
4 | Explain electrical safety procedures for ship and shore personnel | 4.1 | Potential problems associated with shore maintenance personnel working on ship electrical equipment are identified |
4.2 | Safe procedure of isolating electrical machinery for repair or maintenance is applied |
4.3 | Safe method of working on live electrical circuitry for purpose of repair or maintenance is explained |
4.4 | Problems associated with shipboard electrical fires are explained |
4.5 | Safe procedures for fighting shipboard electrical fires including fires in switchboards are clarified |
5 | Synchronise, parallel and load share alternators on manual and auto modes | 5.1 | Process of manually synchronising alternator and sharing kW and kVAR loading under all loading conditions is explained |
5.2 | Process of starting, testing and where applicable, of transferring emergency generator power on to main board, is explained |
5.3 | Operation of synchronising lights, synchroscope and all meters associated with synchronising is outlined |
5.4 | Operation of AVR and prime mover governor with respect to synchronising is outlined and how these can be adjusted at set points is explained |
6 | Examine operation, construction and maintenance of circuit breakers | 6.1 | Features and applications of different types of circuit breakers are differentiated |
6.2 | Closing and opening systems of circuit breakers are explained |
6.3 | Arc extinguishing systems are explained |
6.4 | Method for accessing an air circuit breaker for inspection is analysed |
6.5 | Function and operation of protection devices associated with air circuit breaker and molded case circuit breaker are examined |
7 | Analyse function of emergency battery systems | 7.1 | Different types and characteristics of batteries used for emergency supplies are identified |
7.2 | Methods of battery charging and ways in which charge condition of the battery can be determined are explained |
7.3 | Requirements of emergency supply and how transfer can occur without adversely affecting solid state components are explained |
7.4 | Safety hazards associated with batteries, and procedures to be adopted to minimise explosion and short circuits are appraised |
8 | Explain hazards associated with marine high voltage installations | 8.1 | Functional and operational requirements for a marine high voltage system are outlined |
8.2 | High voltage marine installations are identified |
8.3 | Design features of high voltage installations are explained |
8.4 | Risks and safety procedures associated with working in high voltage environments are identified |
8.5 | Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage installation is outlined |