MARL6021A - Demonstrate advanced knowledge of marine electrical systems Competency Mapping Template
Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners
MARL6021A Mapping and Delivery Guide Demonstrate advanced knowledge of marine electrical systems
Version 1.0 Issue Date: May 2024
Qualification
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Unit of Competency
MARL6021A - Demonstrate advanced knowledge of marine electrical systems
Description
This unit involves the skills and knowledge required to supply shipboard electrical power on board a commercial vessel. It includes analysing electrical layout systems, alternators, marine motors, lighting systems, power management and UPS systems, shipboard electrical equipment and high voltage power systems.
Employability Skills
This unit contains employability skills.
Learning Outcomes and Application
This unit applies to the work of a Marine Engineer Class 1 on commercial vessels of unlimited propulsion power and forms part of the requirements for the Certificate of Competency Marine Engineer Class 1 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: Evaluate advanced electrical layout systems
Effects of power factor changes on prime mover, alternator and electrical system are analysed
Methods of altering load power factor by means of capacitors or synchronous machines are explained
Methods of obtaining constant frequency from a variable frequency output such as a main engine driven alternator and/or variable speed drives for a self discharging equipment are explained
Protecting systems available for shaft driven alternators are evaluated
Element: Analyse construction and principles of operation of different types of marine alternators
Construction and operating parameters of different types of marine alternators are compared and contrasted
Cooling systems, leak detection, monitoring and protection systems in different types of marine alternators are compared and contrasted
Procedures for drying out an alternator with a low insulation resistance are explained
Excitation systems and methods of flashing alternator after loss of excitation are appraised
Systems used for protecting against high winding temperatures, circulating currents, loss of excitation and internal short circuit are evaluated
Element: Analyse different types of direct current (DC) and alternating current (AC) marine motors
Different types and applications of marine motors are compared and contrasted
Difference between types of encapsulation is explained and where they should be used is justified
Motor ratings and effect of overloading on different types of motor are assessed
Possible operational problems associated with marine motors are analysed and appropriate remedial action is devised
Procedure for drying out a motor that has become unserviceable due to either long-term storage or immersion in seawater is formulated
Effects of operating star connected motors compared with delta connected motors are distinguished and when this may be required is suggested
Different types and applications of special motors for deck and cargo operation are analysed
Element: Analyse requirements of motor starters for 3 phase and synchronous motors
Differentiation is made between different types of motor starters
Different types of starters are evaluated in terms of starting torque and current, and these are related to particular motor applications
Simple starter circuit diagrams are evaluated and operating principles of motor starters are explained
Documentation and circuit and wiring diagrams for fault-finding in motor starters are used
Routine maintenance program for monitoring vibration and insulation resistance levels of motors is designed
Element: Analyse lighting systems used on board ships
Common types and applications of lighting systems are evaluated
Distribution layout systems are explained
Fault-finding method for lights and starter systems, including lighting in hazardous areas, is planned using circuit diagrams
Element: Evaluate alternator excitation system design
Different types of excitation systems and impact of load changes are compared
Type, location and function of components involved in excitation are examined
Function, cooling, failure mode and procedures for testing and changing diodes are explained
Functions of an AVR and how it may be incorporated into an excitation system are explained
Process of fault-finding in an AVR and types, causes and remedies of common problems are explained
How excitation systems impact on output in normal and adverse circumstances is assessed
Element: Analyse power management and uninterruptable power systems (UPS) fitted to vessels
Operational functions of power management systems during high load, overload and short circuit conditions are analysed
Functions and components of UPS systems are evaluated
Limitations of power management and UPS fitted to vessels are analysed
System response under possible fault conditions of vessel power management and UPS are determined
Element: Analyse vessel cathodic protection system
Cathodic protection systems and how they interact are analysed
Components of cathodic protection systems are identified and life cycle maintenance program is prepared
Modifications required for operating parameters of cathodic protection systems when operating alongside an active wharf or another vessel are determined
Likely causes of corrosion in relation to size, location or distribution of anodes or current densities are assessed
Other corrosion problems in shipboard environment that may be cause of electrical problems are appraised
Element: Assess requirements and components associated with electrical systems for hazardous spaces on board vessels
Different types, limitation and nameplate identification of ‘E’ equipment are compared
Requirements of classification societies are distinguished from administrations regarding electrical installations on board vessels
Lighting and power supply requirements of pump rooms are identified
Safety requirements for electrical equipment and safety practices on board vessels and how these are extended when alongside a berth are analysed
Existing and new shipboard electrical equipment and systems are compared to assess future requirements as well as potential problems and preventative measures
Performance of existing shipboard electrical equipment and systems is analysed and cost effectiveness studies for modifications or improvements are prepared
Factors involved in commissioning new electrical plant are evaluated
Procedures involved in organising survey of existing plant are outlined
Procedures involved in making recommendations for new systems consistent with modified new ship building requirements are outlined
Element: Appraise high voltage electrical motor propulsion systems
Safety requirements for working with high voltage systems are identified
Use of high voltage systems for propulsion and cargo handling is evaluated
Safe maintenance methods for high voltage switchgear and machines are analysed
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 advanced 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.
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 advanced 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 advanced principles of lighting, cathodic protection, high voltage systems and impart knowledge and ideas verbally, in writing and visually
Identify and interpret complex 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 complex marine electrical systems
Read and interpret written information related to electrical circuitry and components on commercial vessels
Use electrical measuring and testing instruments
Required Knowledge:
Alternating current (AC)/direct current (DC) voltage
AC and DC marine motors
Alternators:
alternator excitation system design
construction
characteristics
synchronised operation
types
Cathodic protection system
Electrical:
layout systems
measuring and testing instruments
shipboard equipment
symbols, basic electrical diagrams/circuits
High voltage electrical motor propulsion systems
Lighting systems used on board ships
Motor starters for three-phase and synchronous motors
Phase angle, power factor, and current flow
Power management and UPS fitted to vessels
Procedures for dealing with hazards and emergencies
Requirements and components associated with electrical systems for hazardous spaces on board vessels
Resistance, inductance and capacitance
Safe electrical working practices
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.
Operating parameters may include:
Excitation current
Insulation grade
Operating temperature
Speed
Marine motors may include:
Polyphase
Reduced starting current motors
Single
Speed changing
Synchronous
Variable speed
Encapsulation may include:
Drip proof
Submersible
TEFC
Motor ratings may include:
Continuous
Short time
Operational problems may include:
Loss of insulation resistance
Open circuit
Overheating
Short circuit
Wrong connections
Different types and applications of special motors for deck and cargo operation may include:
Common faults
Remedies for common faults
Motor starters may include:
DOL
Primary and secondary resistance
Soft or electronic starters
Star-Delta
Transformer starter
Lighting systems may include:
Fluorescent
Halogen
Incandescent
LED
Mercury
Sodium vapour
Distribution layout systems must include:
Emergency lights
Safety lights
How excitation systems impact on output in normal and adverse circumstances must include:
Loss of excitation
Short circuit
Safety requirements may include:
Company requirements
Manufacturer requirements.
Statutory requirements
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 power factor changes on prime mover, alternator and electrical system are analysed
Methods of altering load power factor by means of capacitors or synchronous machines are explained
Methods of obtaining constant frequency from a variable frequency output such as a main engine driven alternator and/or variable speed drives for a self discharging equipment are explained
Protecting systems available for shaft driven alternators are evaluated
Construction and operating parameters of different types of marine alternators are compared and contrasted
Cooling systems, leak detection, monitoring and protection systems in different types of marine alternators are compared and contrasted
Procedures for drying out an alternator with a low insulation resistance are explained
Excitation systems and methods of flashing alternator after loss of excitation are appraised
Systems used for protecting against high winding temperatures, circulating currents, loss of excitation and internal short circuit are evaluated
Different types and applications of marine motors are compared and contrasted
Difference between types of encapsulation is explained and where they should be used is justified
Motor ratings and effect of overloading on different types of motor are assessed
Possible operational problems associated with marine motors are analysed and appropriate remedial action is devised
Procedure for drying out a motor that has become unserviceable due to either long-term storage or immersion in seawater is formulated
Effects of operating star connected motors compared with delta connected motors are distinguished and when this may be required is suggested
Different types and applications of special motors for deck and cargo operation are analysed
Differentiation is made between different types of motor starters
Different types of starters are evaluated in terms of starting torque and current, and these are related to particular motor applications
Simple starter circuit diagrams are evaluated and operating principles of motor starters are explained
Documentation and circuit and wiring diagrams for fault-finding in motor starters are used
Routine maintenance program for monitoring vibration and insulation resistance levels of motors is designed
Common types and applications of lighting systems are evaluated
Distribution layout systems are explained
Fault-finding method for lights and starter systems, including lighting in hazardous areas, is planned using circuit diagrams
Different types of excitation systems and impact of load changes are compared
Type, location and function of components involved in excitation are examined
Function, cooling, failure mode and procedures for testing and changing diodes are explained
Functions of an AVR and how it may be incorporated into an excitation system are explained
Process of fault-finding in an AVR and types, causes and remedies of common problems are explained
How excitation systems impact on output in normal and adverse circumstances is assessed
Operational functions of power management systems during high load, overload and short circuit conditions are analysed
Functions and components of UPS systems are evaluated
Limitations of power management and UPS fitted to vessels are analysed
System response under possible fault conditions of vessel power management and UPS are determined
Cathodic protection systems and how they interact are analysed
Components of cathodic protection systems are identified and life cycle maintenance program is prepared
Modifications required for operating parameters of cathodic protection systems when operating alongside an active wharf or another vessel are determined
Likely causes of corrosion in relation to size, location or distribution of anodes or current densities are assessed
Other corrosion problems in shipboard environment that may be cause of electrical problems are appraised
Different types, limitation and nameplate identification of ‘E’ equipment are compared
Requirements of classification societies are distinguished from administrations regarding electrical installations on board vessels
Lighting and power supply requirements of pump rooms are identified
Safety requirements for electrical equipment and safety practices on board vessels and how these are extended when alongside a berth are analysed
Existing and new shipboard electrical equipment and systems are compared to assess future requirements as well as potential problems and preventative measures
Performance of existing shipboard electrical equipment and systems is analysed and cost effectiveness studies for modifications or improvements are prepared
Factors involved in commissioning new electrical plant are evaluated
Procedures involved in organising survey of existing plant are outlined
Procedures involved in making recommendations for new systems consistent with modified new ship building requirements are outlined
Safety requirements for working with high voltage systems are identified
Use of high voltage systems for propulsion and cargo handling is evaluated
Safe maintenance methods for high voltage switchgear and machines are analysed
Forms
Assessment Cover Sheet
MARL6021A - Demonstrate advanced 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
Feedback to student
Assessor name:
Signature:
Date:
Assessment Record Sheet
MARL6021A - Demonstrate advanced 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