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Evidence Guide: MARL007 - 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

 

MARL007 - 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

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Explain hazards and isolation procedures associated with live electrical components

1.1

Effects of electricity on the human body are outlined

1.2

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

1.3

Correct procedure for isolating an electrical circuit is clarified

1.4

Electrical hazards in a vessel at sea or port are identified

2

Explain basic operation of and hazards associated with marine high voltage installations

2.1

Functional and operational requirements for a marine high voltage system are detailed

2.2

Safety procedures required when working in high voltage environments are outlined

2.3

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

3

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

3.1

Excitation methods used to produce alternating current (AC) and direct current (DC) voltages are outlined

3.2

Basic voltage control of generated AC voltages is outlined

4

Outline key features of basic electrical diagrams used on vessels

4.1

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

4.2

Electrical symbols used in basic electrical diagrams are identified

4.3

Electrical devices used in basic electrical circuits are clarified

5

Use common electrical measuring and testing instruments

5.1

Different types of multimeters are used appropriately

5.2

Functions of insulation and ‘tong’ testers are explained

5.3

Safety requirements when using test equipment are applied

6

Rectify basic electrical faults

6.1

Fault situation is determined by appropriate questioning of client or operator

6.2

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

6.3

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

6.4

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

6.5

Basic common faults in electrical equipment are identified and rectified

7

Outline basic components and layout of a marine electrical switchboard

7.1

Layout of a typical three wire insulated electrical system is sketched

7.2

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

7.3

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

7.4

Safety features on a typical marine switchboard are identified

8

Explain operation of shipboard alternators

8.1

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

8.2

Principles of operation of a marine type alternator are outlined

8.3

Relationship is shown between voltage and speed in regulation of alternator

8.4

Operational characteristics of a marine alternator are outlined

8.5

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

9

Explain procedures for paralleling of alternators

9.1

Process of measuring voltage, frequency and phase angle is outlined

9.2

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

9.3

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

9.4

Process of removing an alternator from the bus is outlined

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Explain hazards and isolation procedures associated with live electrical components

1.1

Effects of electricity on the human body are outlined

1.2

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

1.3

Correct procedure for isolating an electrical circuit is clarified

1.4

Electrical hazards in a vessel at sea or port are identified

2

Explain basic operation of and hazards associated with marine high voltage installations

2.1

Functional and operational requirements for a marine high voltage system are detailed

2.2

Safety procedures required when working in high voltage environments are outlined

2.3

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

3

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

3.1

Excitation methods used to produce alternating current (AC) and direct current (DC) voltages are outlined

3.2

Basic voltage control of generated AC voltages is outlined

4

Outline key features of basic electrical diagrams used on vessels

4.1

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

4.2

Electrical symbols used in basic electrical diagrams are identified

4.3

Electrical devices used in basic electrical circuits are clarified

5

Use common electrical measuring and testing instruments

5.1

Different types of multimeters are used appropriately

5.2

Functions of insulation and ‘tong’ testers are explained

5.3

Safety requirements when using test equipment are applied

6

Rectify basic electrical faults

6.1

Fault situation is determined by appropriate questioning of client or operator

6.2

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

6.3

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

6.4

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

6.5

Basic common faults in electrical equipment are identified and rectified

7

Outline basic components and layout of a marine electrical switchboard

7.1

Layout of a typical three wire insulated electrical system is sketched

7.2

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

7.3

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

7.4

Safety features on a typical marine switchboard are identified

8

Explain operation of shipboard alternators

8.1

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

8.2

Principles of operation of a marine type alternator are outlined

8.3

Relationship is shown between voltage and speed in regulation of alternator

8.4

Operational characteristics of a marine alternator are outlined

8.5

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

9

Explain procedures for paralleling of alternators

9.1

Process of measuring voltage, frequency and phase angle is outlined

9.2

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

9.3

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

9.4

Process of removing an alternator from the bus is outlined

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:

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

Specifies different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

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

Electrical hazards include one or more of the following:

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