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Evidence Guide: MARL5009A - 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

 

MARL5009A - 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
  2. Procedure to be taken in the event of a person suffering an electric shock is clarified
  3. Correct procedure for isolating an electrical circuit is clarified
  4. Electrical hazards in a vessel at sea or port are identified
Effects of electricity on the human body are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Procedure to be taken in the event of a person suffering an electric shock is clarified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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 basic operation of and hazards associated with marine high voltage installations

  1. Functional and operational requirements for a marine high voltage system are detailed
  2. Safety procedures required when working in high voltage environments are outlined
  3. Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage switchgear of various types is outlined
Functional and operational requirements for a marine high voltage system are detailed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety procedures required when working in high voltage environments are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage switchgear of various types is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain principles of power generation and transmission in AC and DC circuits

  1. Excitation methods used to produce alternating current (AC) and direct current (DC) voltages are outlined
  2. Basic voltage control of generated AC voltages is outlined
Excitation methods used to produce alternating current (AC) and direct current (DC) voltages are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Basic voltage control of generated AC voltages is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Outline key features of basic electrical diagrams used on vessels

  1. Types of diagrams used to depict electrical systems on ships are outlined
  2. Electrical symbols used in basic electrical diagrams are identified
  3. Electrical devices used in basic electrical circuits are clarified
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:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Electrical devices used in basic electrical circuits are clarified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Use common electrical measuring and testing instruments

  1. Different types of multimeters are used appropriately
  2. Functions of insulation and ‘tong’ testers are explained
  3. Safety requirements when using test equipment are applied
Different types of multimeters are used appropriately

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Functions of insulation and ‘tong’ testers are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety requirements when using test equipment are applied

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Rectify basic electrical faults

  1. Fault situation is determined by appropriate questioning of client or operator
  2. Safe working practices are demonstrated when carrying out fault-finding work
  3. Basic common faults of equipment and techniques used to find faults are outlined
  4. Knowledge of various types of basic common faults of circuits and techniques is used to find faults
  5. Basic common faults in electrical equipment are identified and rectified
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:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Basic common faults in electrical equipment are identified and rectified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Outline basic components and layout of a marine electrical switchboard

  1. Layout of a typical three wire insulated electrical system is sketched
  2. Interconnections between main switchboard, emergency switchboard and shore supply are explained
  3. Procedure for changing over to emergency switchboard for testing or during loss of mains power is outlined
  4. Safety features on a typical marine switchboard are identified
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:

Teacher:		 Evidence:

 

 

 

 

 

 

 

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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety features on a typical marine switchboard are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain operation of shipboard alternators

  1. Types and construction methods of alternators used on a marine vessel are outlined
  2. Principles of operation of a marine type alternator are outlined
  3. Relationship is shown between voltage and speed in regulation of alternator
  4. Operational characteristics of a marine alternator are outlined
  5. Excitation and automatic voltage regulation systems used with marine alternators are clarified
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
  2. Automatic and manual procedures for synchronising and paralleling marine alternators, including machines of different capacities are clarified
  3. How two machines can be adjusted to share kVAR and kW loads is confirmed
  4. Process of removing an alternator from the bus 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:

Teacher:		 Evidence:

 

 

 

 

 

 

 

How two machines can be adjusted to share kVAR and kW loads is confirmed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Process of removing an alternator from the bus is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

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:

industry-approved marine operations site where basic 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 and/or 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 and/or

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 basic knowledge of marine electrical systems

direct observation of the candidate applying relevant WHS/OHS 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.

Required Skills and Knowledge

Required Skills:

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

Explain basic principles of alternators, generators and control systems, and

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 operating, maintaining and repairing basic 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:

AC/DC voltage

Alternators – construction, characteristics, synchronised operation

Electrical:

safe working practices

measuring and testing instruments

symbols, basic electrical diagrams/circuits

Marine electrical systems – switchboards, instrumentation, earthing

Phase angle, power factor and current flow

Procedures for dealing with hazards and emergencies

Resistance, inductance and capacitance

Switchboards and protection – purpose, testing and maintenance, equipment removal

Work health and safety (WHS)/occupational health and safety (OHS) legislation and policies

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.

Electrical hazards may include:

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