Apply advanced principles of marine electrotechnology

Unit of competency Outline

Date retreived
22/07/2026 4:06 AM AWST

Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.

Unit of competency

National Code
MARL038

State Code
OCH26

TGA Status
Current

DTWD Status
Approved

Current Release Number
1.00

Current Release Date
27/10/2020

View on TGA

State Implementation and Classification

Approved Date

09/04/2021

Field of Education

031701 - Maritime Engineering

Original Release Date

09/04/2021

Nominal Hours

Description

This unit involves the skills and knowledge required to apply advanced marine electrotechnology principles and to perform advanced 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 Class 1 (STCW Chief Engineer Unlimited)Engineer Class 2 (STCW Second Engineer 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), Engineer Class 1 (STCW Chief Engineer Unlimited) or Engineer Class 2 (STCW Second Engineer 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 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.

Notes

Elements and Performance Criteria

1 Analyse circuits incorporating resistance, inductance and capacitive elements in alternating current (AC) and direct current (DC) circuits

1.1 Mathematical problems involving resistor inductor (RL) and resistor capacitor (RC) combinations in DC circuits are solved
1.2 Mathematical problems involving resistive, inductive and capacitive reactance and overall circuit impedance in AC circuits are solved
1.3 Reasons why large power factors are desirable in AC circuits are explained
1.4 Mathematical problems related to power factor correction mechanisms are solved
1.5 Conditions for resonance in series and parallel RLC circuit combinations are analysed
1.6 Mathematical problems involving resonance in series and parallel RLC circuit combinations are solved
1.7 Calculations are performed to solve problems related to solve resistance, voltage drop, current and power in series and parallel circuits
1.8 Calculations are performed to solve problems related to temperature coefficient of resistance and change of resistance of a conductor with a change of temperature

2 Apply complex number theory to analyse AC circuit performance

2.1 J operator is explained
2.2 Rectangular notation of j operator is related to comparable trigonometric and polar notations
2.3 J operator is used in the addition and subtraction of phasors, applying the most appropriate notation to the solution of phasor problems involving current, voltage and impedance
2.4 Conductance, admittance and susceptance are distinguished from each other in terms of resistance, impedance and the j operator
2.5 Problems involving RL and RC elements in different circuit combinations using j operator theory are solved
2.6 Power in AC circuit applications using j operator theory is calculated

3 Analyse operating principles of electrical instrumentation

3.1 Mathematical calculations are performed to demonstrate how moving coil and moving iron instruments may have their ranges changed
3.2 Mathematical calculations are performed to demonstrate how dynamometer type wattmeters may have their measuring ranges extended
3.3 Construction, operating principles and functions of electrical meters are outlined
3.4 Principal methods and instruments used in resistance measurement are detailed
3.5 Resistance measurements are conducted and verified using appropriate electrical instrumentation

4 Analyse operating principles of DC generators

4.1 Electromotive force (EMF) equation is applied to solve problems related to DC generators
4.2 Losses that may occur in DC generators are analysed
4.3 Appropriate parametric relationships for DC. generator losses, together with expressions for output power and efficiency, are derived and associated numerical problems are solved
4.4 Basic principles of DC armature winding techniques are explained
4.5 Generator armature reaction is explained
4.6 Expression for armature EMF is derived and applied to solve problems related to DC generators
4.7 Commutator arcing and how this might be minimised or eliminated is explained
4.8 Open circuit and load characteristic curves for separately excited, shunt and compound wound DC generators are derived
4.9 Faraday’s and Lenz’s Laws are applied to solve problems relating to the electromagnetic induction of EMF and current
4.10 Generation of EMF is illustrated by a simple, single loop conductor rotating in a uniformed magnetic field and how this EMF may be tapped to an external circuit as either AC or DC is explained

5 Analyse operating principles of DC motors

5.1 DC torque equation is applied to solve problems related to DC motors
5.2 Losses that may occur in DC motors are analysed
5.3 Appropriate parametric relationships for DC motor losses, together with expressions for output power and efficiency. are derived and associated numerical problems are solved
5.4 Speed equation for a DC motor is derived and corresponding characteristics for different winding configurations are sketched
5.5 Speed equation and characteristics of different DC motor configurations are applied to explain how DC motor speed may be controlled
5.6 Reasons for armature reaction and methods of compensating for its effects are identified
5.7 Reasons why DC motors need variable starting resistors are explained
5.8 Schematic circuits are prepared for separately excited, series, shunt and compound connected generators and motors to illustrate wiring arrangements used with DC machines

6 Compare operation of synchronous motors and generators

6.1 Marine applications of synchronous motors and generators are identified
6.2 Mathematical expression for the magnitude and rotational speed of the magnetic field produced by a three phase supply is derived
6.3 Operating principles of synchronous motors are explained
6.4 Operation of synchronous motors and generators are compared and contrasted
6.5 Problems using phasor diagrams and mathematical expressions involving the effects of loads and excitation on synchronous motors are solved
6.6 Advantages and disadvantages of AC synchronous motors and generators are analysed
6.7 How alternating electrical quantities may be represented by rotating phasors is illustrated and explained
6.8 Relationships between instantaneous, maximum, average and root mean square (RMS) values of sinusoidally alternating electrical quantities is derived
6.9 Mathematical problems are solved by applying relationships between instantaneous, maximum, average and RMS values of sinusoidally alternating electrical quantities
6.10 Construction features of the AC induction motor are explained
6.11 Expression for slip of an induction motor rotor is derived and applied to frequency of its rotor EMF and current
6.12 Expression for magnitude of rotor EMF and current is derived, taking into account distribution and pitch factors
6.13 Relationships between rotor torque, rotor losses and slip indicating factors that affect torque are outlined
6.14 Significance of torque/slip curves for an induction motor is explained
6.15 Relationship between starting torque and applied voltage is established and consequences of this upon starting methods are outlined

7 Analyse operation of single and three phase transformers

7.1 Basic transformation ratio and EMF equation for an ideal transformer is derived
7.2 No load and on load phasor diagrams for an ideal transformer are constructed, with negligible voltage drop through its windings
7.3 Causes of actual transformer losses are explained and relationships associated with the transformer equivalent circuit are derived
7.4 Open circuit and short circuit tests are applied to calculate transformer efficiency and voltage regulation
7.5 Problems related to the operation of autotransformers are solved

8 Analyse requirements for parallel operation of AC and DC generators

8.1 Conditions required for shunt, series and compound wound DC generators to operate in parallel are identified
8.2 Numerical problems related to parallel operation of shunt, series and compound wound DC generators are solved
8.3 Conditions required for AC generators to operate in parallel are identified
8.4 Numerical problems related to parallel operation of AC generators are solved
8.5 EMF equation for an AC generator is derived, taking into account distribution and pitch factors
8.6 Voltage regulation for synchronous generator is defined
8.7 Effect of power factor on load characteristic of an AC generator is illustrated

9 Explain how principles of electrolytic action apply to electrical cells and batteries

9.1 Kirchhoff’s circuit laws are explained
9.2 Calculations to solve problems involving currents, voltage drop and terminal potential difference for cells connected to form batteries in series and in parallel are performed
9.3 Calculations to solve secondary cell charging and discharging problems are performed
9.4 Calculations to solve problems related to the efficiency of cells are performed

10 Analyse a magnetic circuit

10.1 Key parameters of magnetic circuits are identified
10.2 Formula for calculating the amount of flux generated by a multi-turn solenoid coil carrying a current to give the B/H relationship is applied
10.3 Significance of the varying slopes in the B/H curves for a solenoid coil with air, cast iron, cast steel and mild steel cores is explained
10.4 How a magnetic circuit may be created by using a toroidal core within the solenoid coil is demonstrated
10.5 Calculations to solve problems relating to magnetic circuits using different materials in different parts of their cores, including air gaps, are performed
10.6 Effect on flux density of applying an alternating magnetising force to an iron core is shown diagrammatically

11 Analyse operation of polyphase AC circuits

11.1 How three phase AC may be developed out of simple single phase AC is explained
11.2 Voltage and current relationships between line and phase in both Star and Delta three phase connections are derived
11.3 Standard Star-to-Delta and Delta-to-Star conversion relationships for current and voltage are derived
11.4 Numeric problems involving both balanced and unbalanced circuit loads are solved
11.5 Relationships between kilowatt (kW), kilovolt-ampere (kVA) and kilovolt-ampere reactive (kVAr) for three phase AC circuits are derived
11.6 Calculations are performed using the relationship between kW, kVA and kVAr to solve problems in three phase AC circuits

12 Analyse circuits that incorporate combinations of resistive, inductive and capacitive elements

12.1 Time constant for different circuit combinations subjected to DC EMFs is defined
12.2 Calculations are performed to solve problems involving time constants in DC circuits with changing rates of current in resistive/inductive elements and changing voltages through resistive/capacitive circuit elements
12.3 Differentiation is made between inductive reactance, capacitive reactance and impedance as applied to AC circuits
12.4 Effects of inductive and capacitive reactance upon phasor relationships between applied AC voltage and current are shown
12.5 Concept of total impedance is applied to solution of problems involving single phase AC quantities in the presence of both resistive/inductive and resistive/capacitive circuit elements, arranged in either series or parallel
12.6 Power factor is defined and concepts of real and reactive power usage are applied to solution of problems involving RL and RC elements

13 Describe basic operating principles of shipboard DC machinery

13.1 EMF equation for a DC generator to solve shipboard problems is applied
13.2 Torque equation for a DC motor to solve shipboard problems is applied
13.3 Expression linking back EMF parameters for a DC motor is derived and used to solve shipboard problems
13.4 Various losses that can occur in DC motors and generators are calculated

14 Explain operating principles of basic electrical instrumentation

14.1 Schematic circuit diagrams are prepared that illustrate the main features and applications of moving coil and moving iron voltmeters and ammeters
14.2 Schematic circuit diagrams are prepared that illustrate the main features and applications of air and iron cored dynamometer type wattmeters
14.3 Dangers associated with current and voltage transformers on high current and voltage systems are identified

No information

Replaces

State Code	National Code	Title	Type
AUG32	MARL018	Apply advanced principles of marine electrotechnology	Unit of competency
AUG80	MARL014	Apply intermediate principles of marine electrotechnology	Unit of competency

State Code	National Code	Title	Type
BFV7	MAR50120	Diploma of Marine Engineering	Qualification
BFV8	MAR60120	Advanced Diploma of Marine Engineering (Class 1)	Qualification