This describes the essential skills and knowledge and their level required for this unit

Evidence shall show that knowledge has been acquired of safe working practices and solving problems in electromagnetic devices and related circuits

The knowledge and skills shall be contextualised to current industry standards technologies and practices

KSEGA Electromagnetic devices and circuits

Evidence shall show an understanding of electromagnetic devices and circuits to an extent indicated by the following aspects

T Magnetism encompassing

magnetic field pattern of bar and horseshoe magnets

magnets attraction and repulsion when brought in contact with each other

common magnetic and nonmagnetic materials and groupings diamagnetic paramagnetic and ferromagnetic materials

principle of magnetic screening shielding and its applications

practical applications of magnets

construction operation and applications of reed switches

T Electromagnetism encompassing

conventions representing direction of current flow in a conductor

magnetic field pattern around a single conductor and two adjacent conductors carrying current

Using the right hand rule to determine the direction of magnetic field around a current carrying conductor

direction of force between adjacent current carrying conductors

effect of current length and distance apart on the force between conductors including forces on bus bars during fault conditions

magnetic field around an electromagnet

Using the right hand rule to determine the direction of magnetic field around a current carrying coil

magnetomotive force mmf and its relationship to the number of turns in a coil and the current flowing in the coil

practical applications of electromagnets

T Magnetic circuits encompassing

magnetic characteristic curve for various materials and identify the various regions

Identify the various conditions of a magnetic material from its Hysteresis loop

factors which determine losses in magnetic material

methods used to reduce electrical losses in a magnetic circuit

magnetic flux definition unit and symbol

reluctance as the opposition to the establishment of magnetic flux

permeability definition symbol and unit

difference for magnetic and nonmagnetic materials in regards to reluctance and permeability

calculation of mmf flux or reluctance given any two values

flux density definition symbol unit and calculation

magnetising force definition symbol unit and calculation

common magnetic circuit types

effect of an air gap in a magnetic circuit

terms magnetic leakage and magnetic fringing

T Electromagnetic induction encompassing

principle of electromagnetic induction Faradays law of electromagnetic induction

applying Flemings right hand rule to a current a carrying conductor under the influence of a magnetic field

calculation of induced emf in a conductor given the conductor length flux density and velocity of the conductor

calculation of induced emf in a coil given the number of turns in a coil and the rate of change of flux

calculation of force on a conductor given the flux density of the magnetic field length of the conductor and the current being carried by the conductor

Lenzs law

applications of electromagnetic induction

T Inductance encompassing

construction of an inductor including a bifilar winding inductor

Australian Standard circuit diagram symbol for the four types of inductor

effect of physical parameters on the inductance of an inductor

common types of inductor cores

applications of the different types of inductors

definition of terms self induction inductance and mutual inductance

calculation of value of self induced emf in a coil

mutual induction occurs between two coils

graphical relationship between load voltage current and self induced emf in a single dc circuit having inductance

practical applications for the effects of self and mutual induction

undesirable effects of self and mutual induction

definition of term time constant and draw the characteristic curve as applied to a series circuit containing an inductor and a resistor LR circuitCalculation of value of the time constant for an LR circuit given the values of the components

time constants required for the current in an LR circuit to reach its final value

determining of instantaneous values of voltage and current in an LR circuit using a universal time constant chart

T Measurement Instruments encompassing

moving coil moving iron dynamometer meter movements and clamp testers

practical applications for moving coil moving iron and dynamometer meter movements

Calculation of resistance of shunts and multipliers to extend the range of ammeters and voltmeters

factors to be considered in selecting meters for a particular application

safety category of meters and their associated applications

steps and procedures for the safe use care and storage of electrical instruments

T Magnetic devices encompassing

construction operation and applications of relays

construction operation and applications of contactors

magnetic methods used to extinguish the arc between opening contacts

construction operation and applications of Hall Effect devices

operation and applications of magnetostriction equipment

construction operation and application of magnetic sensing devices

T Machine principles encompassing

basic operating principle of a generator

applying Flemings right hand rule for generators

basic operating principle of a motor

applying Flemings left hand rule for motors

calculation of force and torque developed by a motor

T Rotating machine construction testing and maintenance encompassing

components of a dc machine

difference between a generator and a motor in terms of energy conversion

nameplate of a machine

using electrical equipment to make electrical measurements and comparison of readings with nameplate ratings

Identification of faults in a machine from electrical measurements

care and maintenance processes for rotating machines

safety risks associated with using rotating machinery

T Generators encompassing

basic operation of a dc generator

calculation of generated and terminal voltage of a dc shunt generator

prime movers energy sources and energy flow used to generate electricity

types of dc generators and their applications

methods of excitation used for dc generators

equivalent circuit for a dc generator

importance of residual magnetism for a self excited generator

open circuit characteristics of dc generators

load characteristics of a dc generator

reversing the polarity of a dc generator

Connect and test a dc generator on noload and load

Identify safety risks associated with using generators

T Motors encompassing

operation of a motor and its energy flow

effect of back emf in dc motors

torque as the product of the force on the conductors and the radius of the armaturerotor

types of dc motors and their applications

circuit diagrams for the types of dc motors

equivalent circuit for the types of dc motors

calculation of power output of a motor

characteristics of the different types of dc motors

connection and testing a dc shunt motor on noload and load

reversing the direction of rotation of a dc motor

safety risks associated with using motors include risks of series dc motors

T Machine efficiency encompassing

losses that occur in a dc machine

methods used to determine the losses in a dc machine

calculation of losses and efficiency of a dc machine

efficiency characteristic of a dc machine and the conditions for maximum efficiency

application of Minimum Energy Performance standards MEPS

methods used to maintain high efficiency

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria Required Skills and Knowledge the Range Statement and the Assessment Guidelines for this Training Package

The Evidence Guide forms an integral part of this unit It must be used in conjunction with all parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package

Overview of Assessment

Longitudinal competency development approaches to assessment such as Profiling require data to be reliably gathered in a form that can be consistently interpreted over time This approach is best utilised in Apprenticeship programs and reduces assessment intervention It is the Industrys preferred model for apprenticeships However where summative or final assessment is used it is to include the application of the competency in the normal work environment or at a minimum the application of the competency in a realistically simulated work environment It is recognised that in some circumstances assessment in part or full can occur outside the workplace However it must be in accordance with industry and regulatory policy

Methods chosen for a particular assessment will be influenced by various factors These include the extent of the assessment the most effective locations for the assessment activities to take place access to physical resources additional safety measures that may be required and the critical nature of the competencies being assessed

The critical safety nature of working with electricity electrical equipment gas or any other hazardous substancematerial carries risk in deeming a person competent Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal every day work have a bearing on the decision as to how much and how detailed the data gathered will contribute to its richness Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites shall be met

Evidence for competence in this unit shall be considered holistically Each element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the Assessment Guidelines UEE Evidence shall also comprise

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this shall incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Solve problems in electromagnetic circuits as described as described in and including

A

Using methodological techniques to solve problems in circuits with an electromagnetic device from measure and calculated values

B

Determining the operating parameters of an existing circuit with an electromagnetic device

C

Alternating an existing circuit with an electromagnetic device to comply with specified operating parameters

D

Developing circuits with electromagnetic devices to comply with a specified function and operating parameters

E

Dealing with unplanned events

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy

The resources used for assessment should reflect current industry practices in relation to solving problems in electromagnetic devices and related circuits

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note Competent performance with inherent safe working practices is expected in the industry to which this unit applies This requires assessment in a structured environment which is primarily intended for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit

Note:
Competent performance with inherent safe working practices is expected in the industry to which this unit applies. This requires assessment in a structured environment which is primarily intended for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit.

Concurrent assessment and relationship with other units

For optimisation of training and assessment effort competency development in this unit may be arranged concurrently with unit