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Elements and Performance Criteria

  1. Prepare to troubleshoot resonance circuits.
  2. Solve in resonance circuits.
  3. Complete work and document troubleshooting activities.

Required Skills

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 troubleshooting frequency dependent circuits

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

KSEHA Resonance circuits troubleshooting

Evidence shall show an understanding of resonance circuit troubleshooting applying safe working practices and relevant Standards Codes and Regulations to an extent indicated by the following aspects

T Basic engineering mathematics

SI Units

Using a calculator

Basic Algebra

Applying the laws of indices

Simplification of expressions involving square roots

Graphs and tables

Pythagoras Theorem and trigonometry ratios

T Sinusoidal alternating voltage and current

Generating a sinusoidal waveform

Definition of the terms period peak peaktopeak instantaneous average and rootmeansquare value

Calculating the instantaneous value of a sinusoidal waveform

Calculating the rootmeansquare value and frequency of a of a sinusoidal waveform

Phase relationship between two or more sinusoidal waveforms

Common waveforms used in electronic circuitry

Observation of sinusoidal and other waveforms

T AC measuring equipment

Operating principles of a cathode ray oscilloscope CRO

Set up calibration and use of a CRO

Calibration and limitation of CRO probes

Analogue and digital ac measuring instruments including true rootmeansquare reading instruments

Measurement of the instantaneous peak peaktopeak values and period of sinusoidal and other common waveforms

T Phase relationships in ac circuits

Phasor representation of sinusoidal waveforms

Definitions of inphase outphase phase angle lead and lag

Phasor addition of two voltages or currents

T Resistive ac circuits

Ohms law in ac resistive circuits

Current and voltage phase relationship

Power dissipation

T Inductance in ac circuits

Principles of inductance

Units

Inductive time constant circuits

Inductive reactance

Ohms law in inductive ac circuits

Phase relationships

Verification of operation of RC time constant circuit

T Capacitance in ac circuits

Capacitive reactance

Ohms law in capacitive ac circuits

Current and voltage phase relationships

T Series ac circuits

Definition of Impedance

Impedance

The impedance triangle

Voltages distribution

Vector representation of current and voltages

Verification of operation of series ac circuit

T Parallel ac circuits

Current distribution

Vector representation of voltage and currents

Impedance calculations based on total circuit current and voltage

Verification of operation of parallel ac circuit

T Seriesparallel ac circuits

Examples of circuit

Rules for simplification

T Power factor

Power triangle

True power

Apparent power

Reactive power

Power factor

Power factor correction

T Ideal transformer

Construction and operating principles

Stepup stepdown turns ratios voltage and current ratios

Autotransformer

Core losses

Types of cores and applications

VoltAmpere VA rating

Verification of operation of transformer circuit

T Series resonance

Conditions in a circuit that produce series resonance

Relationship between resonance and frequency

Impedance of a series resonant circuit

Phasor representation of current and series voltage drops in series resonant circuit

Voltage magnification

The Q of a coil and its relevance

Bandwidth and half power points in a resonant circuit

Selectivity

Verification of operation of series resonant circuit

T Parallel resonance

Conditions in a circuit that produce parallel resonance

Impedance of a parallel resonant circuit

Vector representation of voltage and parallel branch currents in a parallel resonant circuit

Current magnification

Verification of operation of parallel resonant circuit

T Filters

Purpose of a filter

Circuits for operation of the following passive filter circuits high pass low pass band stop and band pass

Bandwidth attenuation cutoff roll off and order of filter

Measurements and calculations relating to passive filters

Curves showing the behaviour of various types of filter circuits

Verification of operation of each filter type

Evidence Required

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 must 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 accord 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 influence decisions about howhow much 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

Troubleshoot frequency dependent circuits as described in and including

A

Using methodical problem solving methods

B

Taking measurements correctly and accurately

C

Calculating parameters correctly and accurately

D

Providing solution to resonance circuit problems

E

Providing written justification for the solutions to problems

F

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

Note

Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

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 troubleshooting frequency dependent 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

UEENEEE104A

Solve problems in dc circuits

The critical aspects of occupational health and safety covered in unit UEENEEEA and other discipline specific occupational health and safety units shall be incorporated in relation to this unit

The critical aspects of occupational health and safety covered in unit UEENEEE101A and other discipline specific occupational health and safety units shall be incorporated in relation to this unit.


Range Statement

10) This relates to the unit as a whole providing the range of contexts and conditions to which the performance criteria apply. It allows for different work environments and situations that will affect performance.

This unit shall be demonstrated in relation to solving at least two of the following types of resonance circuit problems.

Determining the operating parameters of an existing circuit

Altering an existing circuit to comply with specified operating parameters

Developing circuits to comply with a specified function and operating parameters

Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1.