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 developing engineering solutions for induction machines and their control problems

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

KSEGA Induction machines diagnostics

Evidence shall show an understanding of developing engineering solutions for induction motor problems to an extent indicated by the following aspects

T Operating principles of polyphase induction motors encompassing

rotating magnetic field torque slip

MMF relationships

Leakage fluxes

T Construction of polyphase induction motors encompassing

squirrel cage motors

slipring motors

construction considerations in minimisation of tooth locking

T Speedtorque relationships in induction motors encompassing

maximum torque

torque slip relationships

squirrel cage rotor types

power flow in the motors

power distribution

torque units

slip ring rotors

T Induction motor performance testing encompassing

noload tests

locked rotor tests

development of motor equivalent circuit from test results

analysis of motor performance using circle diagrams

T Induction motor starters encompassing

starting requirements

type of starters

starting torque

starting dynamics

static friction

mechanical loads

starting duration

T Reduced voltage starting encompassing

starting dynamics

change over conditions

starting duration

acceleration curves

T Speed control of induction motors encompassing

constant torque constant power concepts

torquefluxvoltage relationships

rotor resistance control

stator impedance control

variable frequency control eg PAM PWM Flux vector control

T Braking of induction motors encompassing

electrical braking systems plugging dc dynamic regenerative capacitormagnetic

mechanical braking systems mechanical drum demag eddy current

T Motor protection encompassing

overload

earth fault

phase failure

T Motor selection criteria and RMS rating

T Induction motor maintenancerepair encompassing

routine maintenance schedules

type of repairs mechanical electrical

T Single phase induction motors encompassing

operating principles especially RMF

construction types

speedtorque relationships

testing

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

Develop engineering solutions for induction machine problems as described in and including

A

Understanding the extent of the machine problem

B

Forming effective strategies for solution development and implementation

C

Obtaining machine parameters specifications and performance requirements appropriate to each problem

D

Testing and solutions to machine problems

E

Documenting instruction for implementation of solutions that incorporate risk control measure to be followed

F

Documenting justification of solutions implemented in accordance with professional standards

G

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in the 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 developing engineering solutions for induction machine problems

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

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

UEENEEGA

UEENEEG149A

Provide engineering solutions to problems in complex polyphase power 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.