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 multiple path ac circuits

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies

KSEJA

Low voltage refrigeration circuits

Evidence shall show an understanding of low voltage dc and ac single and multiple path applied to refrigeration systems applying safe working practices and relevant Standards Codes and Regulations to an extent indicated by the following aspects

T Resistance Measurement

Typical field instruments and applications

Insulation resistance tester

IR Tester parts and functions

Continuity testing

Insulation resistance testing

IR Tester voltage ranges

ASNZS wiring rules

Calibration of IR Testers

Storage of IR Testers

Using of testers for continuity and insulation resistance measurement

Calculation of resistance from measured results

T Factors affecting resistance

Factors

Resistivity

Change in length

Change in cross sectional area csa

Change in temperature

PTC and NTC

Influence on practical circuits

Measurement of resistance

T Voltage and current measurement

Hazards

Characteristics of instruments

Reading scales

Voltmeters

Characteristics

Types

Operation

Connection

Loading effect

Advantages and disadvantages

Selection

Ammeters

Characteristics

Types seriesammeter and tongammeter

Operation

Connection

Advantages and disadvantages

Selection

T Direct Current parallel circuits

Parallel circuits

Parallel circuit components

Applications of parallel circuits

Characteristics

Calculation of parallel circuit parameters

Circuit connections

Measurements of R V I in parallel circuits

Determine V I R P

T Direct Current series parallel circuits

SeriesParallel circuits

SeriesParallel circuit components

Applications of seriesparallel circuits

Characteristics

Bridge network

Calculation of seriesparallel circuit parameters

Connection of seriesparallel circuits

Measurements of R V I in seriesparallel circuits

Determine V I R P

T Capacitors and Capacitance

Capacitor construction

Dielectric material

Types of capacitors

Circuit symbols

Capacitor terms

Units

Factors affecting capacitance

Capacitor charge

RC dc series circuit

Time constants

Connection of capacitors

T Capacitors in Series and Parallel

Capacitor hazards

Safe handling of capacitors

Dangers of discharging capacitors

Series connections

Parallel connections

Measuring testing of capacitors

Capacitor faults

Applications of capacitors

Calculation of total capacitance

Series and parallel connections

Testing capacitors for serviceability

T Electromagnetic induction

Faradays law

Applications

Inductance

T Single phase alternating current

Generation of a sinusoidal waveform

Sinusoidal waveform characteristics

Measuring and calculating values of a sinusoidal waveform

Generation of single phase alternating current

Voltage and current in resistive inductive and capacitive circuits

Ohms Law and Impedance

Power

power in a single phase circuit

power factor and phase angle

methods used to measure single phase power energy and power factor

single phase power measurement

effects of low power factor

power factor improvement requirements

power factor improvement methods

wiring rules and regulations

T Magnetic devices

Relays

Contactors

Solenoids

Transformers

Single amp double wound

Volts vs Turns ratio

Losses

VA in vs VA out

Control transformers

Power and motor starting transformers

Safety

Magnetic sensing devices

T Three phase alternating current

Advantage of three phase system

Generation of three phase

Relationship between generated voltages

Phase sequence

Three phase starconnections

Star connections

Line and phase voltages and currents

Three phase four wire systems

function of the neutral conductor

Three phase deltaconnections

Delta connections

Line and phase voltages and currents

T Circuit protection and isolation

Harmful effects of

direct contact

indirect contact

thermal effects

over current

faults

mechanical movement

Earthing

earthing terms

minimum earthing conductor size

MEM system

ASNZS requirements

Circuit protection devices

purpose types operating principles characteristics and applications including rewireable fuses HRC fuses circuit breakers residual current devices and overvoltage and under voltage protection devices

circuit protection and load protection

ASNZS requirements including sanger tags amp switch locking

discrimination of circuit protection devices

Isolation devices

requirements for provision of isolation

need for protection against mechanical movement

ASNZS requirements

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 the 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 industrypreferred 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 everyday 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 must 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

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 - UEE07 '. 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 single and multiple path dc and ac circuits as described in and including

A

Determining the operating parameters of an existing circuit

B

Alternating an existing circuit to comply with specified operating parameters

C

Developing circuits to comply with a specified function and operating parameters

D

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in a holistic assessment with the above listed items

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 in this unit

These should be used in the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions for assessment 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 multiple path ac 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 that the specified essential knowledge and associated skills are assessed 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 that the specified essential knowledge and associated skills are assessed 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

UEENEEEA

UEENEEE103A

Solve problems in ELV single path circuits