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Evidence Guide: MARL058 - Demonstrate basic knowledge of marine electrical systems

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MARL058 - Demonstrate basic knowledge of marine electrical systems

What evidence can you provide to prove your understanding of each of the following citeria?

Explain hazards and isolation procedures associated with live electrical components

  1. Effects of electricity on the human body are outlined
Effects of electricity on the human body are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Procedures to be taken in the event of a person suffering an electric shock are clarified

Completed
Date:

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Correct procedure for isolating an electrical circuit is clarified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Electrical hazards in a vessel at sea or port are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain principles of power generation and transmission in alternating current (AC) and direct current (DC) circuits

  1. Excitation methods used to produce AC and DC voltages are outlined
Excitation methods used to produce AC and DC voltages are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Basic voltage control of generated AC voltages is outlined

Completed
Date:

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Outline key features of basic electrical diagrams used on vessels

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Electrical symbols used in basic electrical diagrams are identified

Completed
Date:

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Electrical devices used in basic electrical circuits are clarified

Completed
Date:

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Use common electrical measuring and testing instruments

  1. Different types of multimeters are used appropriately
Different types of multimeters are used appropriately

Completed
Date:

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Functions of insulation and ‘tong’ testers are explained

Completed
Date:

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Safety requirements when using test equipment are applied

Completed
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Rectify basic electrical faults

  1. Fault situation is determined by appropriate questioning of client or operator
Fault situation is determined by appropriate questioning of client or operator

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

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

Completed
Date:

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

Completed
Date:

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Basic common faults in electrical equipment are identified and rectified

Completed
Date:

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Outline basic components and layout of a marine electrical switchboard

  1. Layout of a typical three-wire insulated electrical system is sketched
Layout of a typical three-wire insulated electrical system is sketched

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

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

Completed
Date:

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Safety features on a typical marine switchboard are identified

Completed
Date:

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Explain operation of shipboard alternators

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Principles of operation of a marine type alternator are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Relationship is shown between voltage and speed in regulation of alternator

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Operational characteristics of a marine alternator are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain procedures for paralleling of alternators

  1. Process of measuring voltage, frequency and phase angle is outlined
Process of measuring voltage, frequency and phase angle is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

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How two machines can be adjusted to share kilovolt-ampere reactive (kVAR) and kilowatt (kW) loads is confirmed

Completed
Date:

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Process of removing an alternator from the bus is outlined

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria on at least one occasion and include:

assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices

explaining basic principles of alternators, generators and control systems

identifying and interpreting numerical and graphical information in electrical diagrams and specifications for a commercial vessel

identifying and suggesting ways of rectifying electrical hazards and emergency situations on a vessel

identifying methods, procedures and materials needed for operating, maintaining and repairing basic marine electrical systems

imparting knowledge and ideas through verbal, written and visual means

providing accurate and reliable information

providing appropriate level of detail in responses

reading and interpreting written information related to electrical circuitry and components on commercial vessels

using electrical measuring and testing instruments.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

alternating current (AC)/direct current (DC) voltage

alternators:

characteristics

construction

synchronised operation

automatic control devices, including:

process control

system control

electrical:

measuring and testing instruments

safe working practices

symbols, basic electrical diagrams/circuits

electrical hazards, including:

electric shock

electrical fire

moving and rotating electrical equipment

non-compliance with safe working procedures

over-speed of electrical machinery

poor housekeeping procedures

using equipment beyond safe working limits

electrical motors

high voltage (HV)

marine electrical systems, including:

earthing

instrumentation

power distribution boards

switchboards

monitoring systems

phase angle, power factor and current flow

procedures for dealing with hazards and emergencies

protective devices

resistance, inductance and capacitance

switchboards and protection, including:

equipment removal

purpose

testing and maintenance

work health and safety (WHS)/occupational health and safety (OHS) legislation and policies.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.