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Evidence Guide: MARL028 - Demonstrate intermediate 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

 

MARL028 - Demonstrate intermediate knowledge of marine electrical systems

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

Analyse common faults in shipboard electrical machinery

  1. Effects and ways of detecting earth on 3 wire insulated and 4 wire earthed neutral systems are explained
  2. Effects of short circuits and operation of discrimination protection are explained
  3. Symptoms and effects of ‘light’ and ‘heavy’ short circuits on components and circuits are compared
  4. Effects of open circuits on systems and components transformers are analysed
  5. Causes and effects of ‘hot spots’ in circuits are identified
  6. Cause and effects of static electricity on shafting and when cleaning tanks are identified
Effects and ways of detecting earth on 3 wire insulated and 4 wire earthed neutral systems are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Effects of short circuits and operation of discrimination protection are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Symptoms and effects of ‘light’ and ‘heavy’ short circuits on components and circuits are compared

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Effects of open circuits on systems and components transformers are analysed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Causes and effects of ‘hot spots’ in circuits are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Cause and effects of static electricity on shafting and when cleaning tanks are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Perform fault- finding on electrical circuits

  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. Procedure for safely drying out an electrical machine with a low IR is outlined
  3. Open circuit in a 3phase motor is safely tested
  4. Procedure for testing internal short circuit in a 3phase motor is clarified
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

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Procedure for safely drying out an electrical machine with a low IR is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Open circuit in a 3phase motor is safely tested

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Procedure for testing internal short circuit in a 3phase motor is clarified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analyse complex shipboard switchboard layouts

  1. Switchboard layouts are interpreted
  2. The effects and indications of earths on the system including intermittent and multi earths are explained
  3. Safe procedure for locating earths on main and low voltage circuits including 24 V system is outlined
  4. Operation of preferential tripping arrangements for overload protection is explained
  5. Relationship between main and emergency switchboards is explained
  6. Different methods of start up after black outs are outlined
Switchboard layouts are interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The effects and indications of earths on the system including intermittent and multi earths are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safe procedure for locating earths on main and low voltage circuits including 24 V system is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Operation of preferential tripping arrangements for overload protection is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Relationship between main and emergency switchboards is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Different methods of start up after black outs are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain electrical safety procedures for ship and shore personnel

  1. Potential problems associated with shore maintenance personnel working on ship electrical equipment are identified
  2. Safe procedure of isolating electrical machinery for repair or maintenance is applied
  3. Safe method of working on live electrical circuitry for purpose of repair or maintenance is explained
  4. Problems associated with shipboard electrical fires are explained
  5. Safe procedures for fighting shipboard electrical fires including fires in switchboards are clarified
Potential problems associated with shore maintenance personnel working on ship electrical equipment are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safe procedure of isolating electrical machinery for repair or maintenance is applied

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safe method of working on live electrical circuitry for purpose of repair or maintenance is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Problems associated with shipboard electrical fires are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safe procedures for fighting shipboard electrical fires including fires in switchboards are clarified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Synchronise, parallel and load share alternators on manual and auto modes

  1. Process of manually synchronising alternator and sharing kW and kVAR loading under all loading conditions is explained
  2. Process of starting, testing and where applicable, of transferring emergency generator power on to main board, is explained
  3. Operation of synchronising lights, synchroscope and all meters associated with synchronising is outlined
  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
Process of manually synchronising alternator and sharing kW and kVAR loading under all loading conditions is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Process of starting, testing and where applicable, of transferring emergency generator power on to main board, is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Operation of synchronising lights, synchroscope and all meters associated with synchronising is outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Operation of AVR and prime mover governor with respect to synchronising is outlined and how these can be adjusted at set points is explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Examine operation, construction and maintenance of circuit breakers

  1. Features and applications of different types of circuit breakers are differentiated
  2. Closing and opening systems of circuit breakers are explained
  3. Arc extinguishing systems are explained
  4. Method for accessing an air circuit breaker for inspection is analysed
  5. Function and operation of protection devices associated with air circuit breaker and molded case circuit breaker are examined
Features and applications of different types of circuit breakers are differentiated

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Closing and opening systems of circuit breakers are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Arc extinguishing systems are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Method for accessing an air circuit breaker for inspection is analysed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Function and operation of protection devices associated with air circuit breaker and molded case circuit breaker are examined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Analyse function of emergency battery systems

  1. Different types and characteristics of batteries used for emergency supplies are identified
  2. Methods of battery charging and ways in which charge condition of the battery can be determined are explained
  3. Requirements of emergency supply and how transfer can occur without adversely affecting solid state components are explained
  4. Safety hazards associated with batteries, and procedures to be adopted to minimise explosion and short circuits are appraised
Different types and characteristics of batteries used for emergency supplies are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Methods of battery charging and ways in which charge condition of the battery can be determined are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Requirements of emergency supply and how transfer can occur without adversely affecting solid state components are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety hazards associated with batteries, and procedures to be adopted to minimise explosion and short circuits are appraised

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Explain hazards associated with marine high voltage installations

  1. Functional and operational requirements for a marine high voltage system are outlined
  2. High voltage marine installations are identified
  3. Design features of high voltage installations are explained
  4. Risks and safety procedures associated with working in high voltage environments are identified
  5. Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage installation is outlined
Functional and operational requirements for a marine high voltage system are outlined

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

High voltage marine installations are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Design features of high voltage installations are explained

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Risks and safety procedures associated with working in high voltage environments are identified

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage installation 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

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

Required Skills and Knowledge

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

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

applying relevant work health and safety/occupational health and safety (WHS/OHS) requirements and work practices

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

explaining intermediate principles of electrical circuits, switchboards, alternators and circuit breakers

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 testing marine electrical systems

imparting knowledge and ideas through verbal , written and visual means

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, performance criteria and range of conditions and include knowledge of:

alternating current (AC)/direct 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 diagrams/circuits

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 state/territory 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

WHS/OHS legislation and policies.

Range Statement

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

Systems and components include one or more of the following:

motors

transformers

Switchboard layouts include one or more of the following:

DC systems

dedicated power supplies

dual supply for steering gear

feed back and feed forward arrangements

interconnection with low voltage

Problems include one or more of the following:

electric shock

enclosed space work

noncompliance with safe working procedures

unfamiliar with marine electrical systems

using equipment beyond safe working limits

working at heights