This unit involves the skills and knowledge required to develop engineering solutions for induction machine and control problems.

It includes working safely; determining problems; obtaining induction machine operation, construction and application; gathering and analysing solutions; applying problem-solving techniques; and developing and documenting solutions.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare to develop engineering solution for induction machine problems

1.1

Work health and safety (WHS)/occupational health and safety (OHS) processes and workplace procedures for a given work area are identified, obtained and applied

1.2

WHS/OHS risk control measures and workplace procedures in preparation for the work are followed

1.3

Scope of induction machine problem is determined from performance specifications and/or documentation and in consultation with relevant person/s

1.4

Activities are planned to meet scheduled timelines in consultation with others involved in the work

1.5

Strategies are formed to ensure solution development and implementation is carried out efficiently

2

Develop engineering solution

2.1

WHS/OHS risk control measures and workplace procedures for carrying out the work are followed

2.2

Induction machine construction, operation, characteristics and applications are applied to developing solutions to induction machine problems

2.3

Parameters tested, data taken, specifications and performance requirements to each machine problem are obtained in accordance with workplace procedures

2.4

Approaches to resolving induction machine problems are analysed to provide most effective solutions

2.5

Unplanned events are dealt with safely and effectively in accordance with relevant industry standards and workplace procedures

2.6

Quality of work is monitored in accordance with relevant industry standards and workplace procedures

3

Implement engineering solution and complete documentation

3.1

Solutions to machine problems are tested to determine their effectiveness and modified as required

3.2

Adopted solutions are documented, including instruction for implementation with risk control measures

3.3

Relevant person/s required to implement solutions to induction machine problems is coordinated in accordance with relevant industry standards and workplace procedures

3.4

Justification for solutions used to solve induction machine problems is documented in work/project records in accordance with relevant industry standards

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

understanding the extent of the machine problem

forming effective strategies for solution development and implementation

obtaining machine parameters, specifications and performance requirements appropriate to each problem

testing and solutions to machine problems

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

documenting justification of solutions implemented in accordance with professional standards

dealing with unplanned events

analysing approaches to solutions

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including using risk control measures

determining the scope of induction machine problems

monitoring quality of work

planning activities to meet timelines.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

induction machines diagnostics and engineering solutions for induction motor problems, including:

operating principles of polyphase induction motors encompassing:

rotating magnetic field torque slip

MMF relationships

leakage fluxes

construction of polyphase induction motors encompassing:

squirrel cage motors

slip-ring motors

construction considerations in minimisation of tooth locking

speed-torque 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

induction motor performance testing encompassing:

no-load tests

locked rotor tests

development of motor equivalent circuit from test results

analysis of motor performance using circle diagrams

induction motor starters encompassing:

starting requirements

type of starters

starting torque

starting dynamics

static friction

mechanical loads

starting duration

reduced voltage starting encompassing:

starting dynamics

change over conditions

starting duration

acceleration curves

speed control of induction motors encompassing:

constant torque, constant power concepts

torque-flux-voltage relationships

rotor resistance control

stator impedance control

variable frequency control (e.g. PAM, PWM and flux vector control)

braking of induction motors encompassing:

electrical braking systems (plugging, direct current (d.c.) dynamic, regenerative and capacitor-magnetic)

mechanical braking systems (mechanical drum, demag and eddy current)

motor protection encompassing:

overload

earth fault

phase failure

motor selection criteria and RMS rating

induction motor maintenance/repair encompassing:

routine maintenance schedules

type of repairs (mechanical and electrical)

single phase induction motors encompassing:

operating principles (especially RMF)

construction types

speed-torque relationships

testing

relevant induction machine construction, operation, characteristics and applications, including driven load and duty cycle

relevant machine parameters, specifications and performance requirements

relevant manufacturer specifications and operating instructions/manuals

relevant job safety assessments or risk mitigation processes

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace quality, instructions, policies and procedures.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must occur in suitable workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated suitable workplace operational situations that replicate workplace conditions.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Resources for assessment must include access to:

a range of relevant exercises, case studies and/or simulations

relevant and appropriate materials, tools, facilities and equipment currently used in industry

resources that reflect current industry practices in relation to developing engineering solutions for induction machine problems

applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Developing engineering solutions must include the following:

at least two induction machine problems

Electrotechnology

Electrical