Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners
MARL042 Mapping and Delivery Guide
Apply basic principles of marine electrotechnology
Version 1.0
Issue Date: May 2024
Qualification | - |
Unit of Competency | MARL042 - Apply basic principles of marine electrotechnology | |
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Description | ||||
Employability Skills | ||||
Learning Outcomes and Application | This unit involves the skills and knowledge required to explain basic marine electrotechnology principles and to perform basic electrical calculations.This unit applies to people working in the maritime industry in the capacity of:Electro-Technical Officer (STCW Electro-Technical Officer Unlimited)Engineer Watchkeeper (STCW Engineer Watchkeeper Unlimited). Licensing/Regulatory InformationLegislative and regulatory requirements are applicable to this unit. This unit is one of the requirements to obtain Australian Maritime Safety Authority (AMSA) certification as an Electro-Technical Officer (STCW Electro-Technical Officer Unlimited) or Engineer Watchkeeper (STCW Engineer Watchkeeper Unlimited) and to meet regulatory requirements this unit must be delivered consistent with Marine Orders and with the relevant sections of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW).Those regulatory requirements include STCW International Maritime Organisation Organization (IMO) model course competencies and areas of knowledge, understanding and proficiency, together with the estimated total hours required for lectures and practical exercises. Teaching staff should note that timings are suggestions only and should be adapted to suit individual groups of trainees depending on their experience, ability, equipment and staff available for training. | |||
Duration and Setting | X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
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Prerequisites/co-requisites | ||||
Competency Field | L – Engineering |
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 | |
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Elements of Competency | Performance Criteria | |||||||
Element: Explain how material properties affect resistance of electrical conductors |
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Element: How resistance varies with changes in conductor length and cross-sectional area is outlined | ||||||||
Element: How resistance varies with temperature is outlined | ||||||||
Element: Calculations are performed that illustrate how material properties affect resistance of electrical conductors | ||||||||
Element: Apply Ohm’s Law to electrical circuits |
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Element: Terms and symbols used in Ohm’s Law are used correctly | ||||||||
Element: Calculations are performed using Ohm’s Law to solve problems involving internal, external and variable resistances in both series and parallel circuits | ||||||||
Element: Calculations are performed to determine power required and/or energy expended by electrical devices | ||||||||
Element: Circuits for a Wheatstone bridge and a slide wire bridge are sketched and their application on a ship is outlined | ||||||||
Element: Calculations are performed dealing with resistances, currents and voltage drops in bridge circuits under null or balanced conditions | ||||||||
Element: Apply principles of electrolytic action to electrical cells |
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Element: Primary cells are distinguished from secondary cells | ||||||||
Element: Calculations are performed to solve problems involving currents, voltage drops and terminal potential difference of cells connected to form batteries in series and in parallel | ||||||||
Element: How capacity of a battery is measured is explained | ||||||||
Element: Construction of typical batteries used in marine environments is outlined | ||||||||
Element: Apply principles of electromagnetism to EMF generation |
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Element: Terms and symbols used in Faraday’s and Lenz’s laws of electromagnetic induction are used correctly | ||||||||
Element: Calculations are performed using Faraday’s and Lenz’s laws of electromagnetic induction to solve problems related to electromagnetism and EMF generation | ||||||||
Element: Fleming’s Right Hand Rule is outlined | ||||||||
Element: Explain operation of direct current (DC) rotating machinery |
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Element: Principle wiring arrangements used with DC machines are outlined | ||||||||
Element: Action of the commutator in DC generators is outlined | ||||||||
Element: Significance of Back EMF (Eb) in the operation of DC motors is outlined | ||||||||
Element: Mathematical formulae are applied to show relationships between operational parameters of DC motors | ||||||||
Element: Calculations are performed to solve simple problems relating to power output and efficiency in DC. motors | ||||||||
Element: Explain operation of alternating current (AC) rotating machinery |
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Element: Difference between Star and Delta connections is outlined | ||||||||
Element: How a three phase supply can generate a rotating magnetic field is explained | ||||||||
Element: Construction of an AC synchronous generator is outlined | ||||||||
Element: Construction of an AC induction motor is outlined | ||||||||
Element: Calculations are performed to show how driving torque is produced in an induction motor | ||||||||
Element: Explain parallel operation and load sharing of generator |
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Element: Main requirements for satisfactory power sharing between both AC and DC generators are outlined | ||||||||
Element: Sequences that occur when load changes on two DC generators working in parallel without an equaliser connection are outlined | ||||||||
Element: Effect of varying power factors on the load/voltage curve of an AC generator is outlined | ||||||||
Element: Explain coupling and breaking connections between switchboard and distribution panels |
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Element: Construction and operation principle of measuring instruments in main and emergency switchboards and distribution panels are outlined | ||||||||
Element: Construction and operation principle of circuit breakers and their tripping devices are outlined | ||||||||
Element: Procedures for restarting ship equipment after power supply failure are outlined | ||||||||
Element: Connection between main and emergency switchboards and necessary safeguards are outlined | ||||||||
Element: Procedures for changeover to shore-connection supply are outlined |