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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. Analyse common faults in shipboard electrical machinery
   • Effects and ways of detecting earth on 3wire insulated and 4wire 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
2. 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
3. Analyse complex shipboard switchboard layouts
   • Switchboard layouts are interpreted
   • 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
4. 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
5. 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
6. 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
7. 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
8. 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

Required Skills

Required Skills

Assess own work outcomes and maintain knowledge of current codes standards regulations and industry practices

Explain intermediate principles of electrical circuits switchboards alternators and circuit breakers

Identify and interpret numerical and graphical information in electrical diagrams and specifications for a commercial vessel

Identify and suggest ways of rectifying electrical hazards and emergency situations on a vessel

Identify methods procedures and materials needed for testing marine electrical systems

Impart knowledge and ideas through verbal written and visual means

Read and interpret written information related to electrical circuitry and components on commercial vessels

Use electrical measuring and testing instruments

Required Knowledge

Alternating current ACdirect current DC voltage

Alternators construction characteristics synchronised operation

Batteries

Circuit breakers

Circuits

Earthing

Electrical measuring and testing instruments

Electrical safe working practices

Electrical symbols basic electrical diagramscircuits

Emergency battery systems

Fault finding procedures

Isolation procedures

Phase angle power factor and current flow

Procedures for dealing with hazards and emergencies

Regulations of relevant stateterritory maritime and electrical licensing authorities

Resistance inductance and capacitance

Risks and safety procedures associated with working in high voltage environments

Safety environmental and hazard control precautions and procedures relevant to marine electrical systems

Switchboards and protection purpose testing and maintenance equipment removal

Work health and safety WHSoccupational health and safety OHS legislation and policies

Evidence Required

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria the required skills and knowledge the range statement and the Assessment Guidelines for the Training Package
Critical aspects for assessment and evidence required to demonstrate competency in this unit	The evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the Elements Performance Criteria Required Skills Required Knowledge and include providing accurate and reliable information providing appropriate level of detail in responses
Context of and specific resources for assessment	Performance is demonstrated consistently over time and in a suitable range of contexts Resources for assessment include access to industryapproved marine operations site where intermediate knowledge of marine electrical systems can be demonstrated technical reference library with current publications on marine electrical systems tools equipment and personal protective equipment currently used in industry relevant regulatory and equipment documentation that impacts on work activities range of relevant exercises case studies andor other simulated practical and knowledge assessments appropriate range of relevant operational situations in the workplace In both real and simulated environments access is required to relevant and appropriate materials and equipment applicable documentation including workplace procedures regulations codes of practice and operation manuals
Method of assessment	Practical assessment must occur in an appropriately simulated workplace environment andor appropriate range of situations in the workplace A range of assessment methods should be used to assess practical skills and knowledge The following examples are appropriate to this unit direct observation of the candidate demonstrating intermediate knowledge of marine electrical systems direct observation of the candidate applying relevant WHSOHS requirements and work practices
Guidance information for assessment	Holistic assessment with other units relevant to the industry sector workplace and job role is recommended In all cases where practical assessment is used it should be combined with targeted questioning to assess Required Knowledge Assessment processes and techniques must be appropriate to the language and literacy requirements of the work being performed and the capacity of the candidate

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Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below.
Systems and components may include:	Motors Transformers
Switchboard layouts may include:	DC systems Dedicated power supplies Dual supply for steering gear Feed back and feed forward arrangements Interconnection with low voltage
Problems may include:	Electric shock Enclosed space work Noncompliance with safe working procedures Unfamiliar with marine electrical systems Using equipment beyond safe working limits Working at heights

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