Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MARL5009A Mapping and Delivery Guide
Demonstrate basic knowledge of marine electrical systems

Version 1.0
Issue Date: April 2024


Qualification -
Unit of Competency MARL5009A - Demonstrate basic knowledge of marine electrical systems
Description This unit involves the skills and knowledge required to operate alternators, generators and control systems to supply shipboard electrical power on board a commercial vessel.
Employability Skills This unit contains employability skills.
Learning Outcomes and Application This unit applies to the work of Marine Engineering Watchkeepers on commercial vessels greater than 750 kW and forms part of the requirements for the Certificate of Competency Marine Engineer Watchkeeper issued by the Australian Maritime Safety Authority (AMSA).
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
Prerequisites/co-requisites Not applicable.
Competency Field
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Explain hazards and isolation procedures associated with live electrical components
  • Effects of electricity on the human body are outlined
  • Procedure to be taken in the event of a person suffering an electric shock is clarified
  • Correct procedure for isolating an electrical circuit is clarified
  • Electrical hazards in a vessel at sea or port are identified
       
Element: Explain basic operation of and hazards associated with marine high voltage installations
  • Functional and operational requirements for a marine high voltage system are detailed
  • Safety procedures required when working in high voltage environments are outlined
  • Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage switchgear of various types is outlined
       
Element: Explain principles of power generation and transmission in AC and DC circuits
  • Excitation methods used to produce alternating current (AC) and direct current (DC) voltages are outlined
  • Basic voltage control of generated AC voltages is outlined
       
Element: Outline key features of basic electrical diagrams used on vessels
  • Types of diagrams used to depict electrical systems on ships are outlined
  • Electrical symbols used in basic electrical diagrams are identified
  • Electrical devices used in basic electrical circuits are clarified
       
Element: Use common electrical measuring and testing instruments
  • Different types of multimeters are used appropriately
  • Functions of insulation and ‘tong’ testers are explained
  • Safety requirements when using test equipment are applied
       
Element: Rectify basic electrical faults
  • Fault situation is determined by appropriate questioning of client or operator
  • Safe working practices are demonstrated when carrying out fault-finding work
  • Basic common faults of equipment and techniques used to find faults are outlined
  • Knowledge of various types of basic common faults of circuits and techniques is used to find faults
  • Basic common faults in electrical equipment are identified and rectified
       
Element: Outline basic components and layout of a marine electrical switchboard
  • Layout of a typical three wire insulated electrical system is sketched
  • Interconnections between main switchboard, emergency switchboard and shore supply are explained
  • Procedure for changing over to emergency switchboard for testing or during loss of mains power is outlined
  • Safety features on a typical marine switchboard are identified
       
Element: Explain operation of shipboard alternators
  • Types and construction methods of alternators used on a marine vessel are outlined
  • Principles of operation of a marine type alternator are outlined
  • Relationship is shown between voltage and speed in regulation of alternator
  • Operational characteristics of a marine alternator are outlined
  • Excitation and automatic voltage regulation systems used with marine alternators are clarified
       
Element: Explain procedures for paralleling of alternators
  • Process of measuring voltage, frequency and phase angle is outlined
  • Automatic and manual procedures for synchronising and paralleling marine alternators, including machines of different capacities are clarified
  • How two machines can be adjusted to share kVAR and kW loads is confirmed
  • Process of removing an alternator from the bus is outlined
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

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.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

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

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

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Effects of electricity on the human body are outlined 
Procedure to be taken in the event of a person suffering an electric shock is clarified 
Correct procedure for isolating an electrical circuit is clarified 
Electrical hazards in a vessel at sea or port are identified 
Functional and operational requirements for a marine high voltage system are detailed 
Safety procedures required when working in high voltage environments are outlined 
Procedure for assisting suitably qualified personnel to carry out maintenance and repair of high voltage switchgear of various types is outlined 
Excitation methods used to produce alternating current (AC) and direct current (DC) voltages are outlined 
Basic voltage control of generated AC voltages is outlined 
Types of diagrams used to depict electrical systems on ships are outlined 
Electrical symbols used in basic electrical diagrams are identified 
Electrical devices used in basic electrical circuits are clarified 
Different types of multimeters are used appropriately 
Functions of insulation and ‘tong’ testers are explained 
Safety requirements when using test equipment are applied 
Fault situation is determined by appropriate questioning of client or operator 
Safe working practices are demonstrated when carrying out fault-finding work 
Basic common faults of equipment and techniques used to find faults are outlined 
Knowledge of various types of basic common faults of circuits and techniques is used to find faults 
Basic common faults in electrical equipment are identified and rectified 
Layout of a typical three wire insulated electrical system is sketched 
Interconnections between main switchboard, emergency switchboard and shore supply are explained 
Procedure for changing over to emergency switchboard for testing or during loss of mains power is outlined 
Safety features on a typical marine switchboard are identified 
Types and construction methods of alternators used on a marine vessel are outlined 
Principles of operation of a marine type alternator are outlined 
Relationship is shown between voltage and speed in regulation of alternator 
Operational characteristics of a marine alternator are outlined 
Excitation and automatic voltage regulation systems used with marine alternators are clarified 
Process of measuring voltage, frequency and phase angle is outlined 
Automatic and manual procedures for synchronising and paralleling marine alternators, including machines of different capacities are clarified 
How two machines can be adjusted to share kVAR and kW loads is confirmed 
Process of removing an alternator from the bus is outlined 

Forms

Assessment Cover Sheet

MARL5009A - Demonstrate basic knowledge of marine electrical systems
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

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Assessor name:

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Assessment Record Sheet

MARL5009A - Demonstrate basic knowledge of marine electrical systems

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

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