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Evidence Guide: UEEEL0066 - Rewind LV direct current machines

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

UEEEL0066 - Rewind LV direct current machines

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare to rewind d.c. machine

  1. Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are identified and applied
Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are identified and applied

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Existing WHS/OHS risk control measures for work preparation are followed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Scope of work is determined from job specifications and regulatory requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Advice is sought from the work supervisor to ensure the work is coordinated effectively with others

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Winding data is obtained from winding data records or directly from measurements of stator and recorded in accordance with workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Materials required for the work are obtained in accordance with workplace procedures and job specification

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Tools, equipment and testing devices needed to carry out work are obtained and checked for correct operation and safety

  1. Existing WHS/OHS risk control work measures are followed
Existing WHS/OHS risk control work measures are followed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Machines/equipment are checked and isolated in accordance with WHS/OHS requirements and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Induction machine is dismantled and parts tagged and stored to prevent loss or damage in accordance with workplace procedures and instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Winding is stripped from stator in accordance with workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Armature and fields are wound and insulated in accordance with winding data, job specifications and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Machine is assembled and prepared for inspection and testing in accordance with workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Unplanned situations are responded to in accordance with workplace procedures in a manner that minimises risk to personnel and equipment

Completed
Date:

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Routine quality checks are conducted to ensure coils are correctly wound, with correct wire, number of turns and shape in accordance with workplace procedures and job specifications

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Electrical coil work is completed in timeframe, environment and workplace conditions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete workplace reports

  1. WHS/OHS work completion risk control measures are followed
WHS/OHS work completion risk control measures are followed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Workplace report, forms/data sheets are completed accurately in accordance with workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

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 two separate occasions and include:

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

applying sustainable energy principles and practices

completing workplace reports and documentation

dealing with unplanned events in accordance with workplace procedures in a manner that minimises risk to personnel and equipment

inspecting and testing of completed machine work

planning to rewind low voltage (LV) direct current (d.c.) machines

rewinding d.c. machines rated for LV, including:

adhering to quality workplace procedures

assembling machine and preparing for testing

completing workplace reports/forms accurately

dismantling machine and storing parts securely

following winding specifications

preparing stator for winding

selecting correct coils and insulation

winding and connecting armature and fields correctly

checking dimensions

using tools safely in accordance with workplace procedures.

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:

commutation and interpoles, including:

conditions for sparkless commutation and methods used to reduce sparking

interpoles or commutating poles

principles of commutation and advantages of interpoles

resistance and electromagnetic field commutation

current industry practices and technologies

d.c. motor winding techniques

calculations and insulation specifications, including:

calculation of a half coil length and the amount of copper required

commutators and identification of insulation specifications

preparation of coils and equalisers

preparation of copper prior to insulating coils and equalisers on armatures

commutation and interpoles

critical details and measurements when stripping a stator of a d.c. machine, including:

lap winding with equalisers

types of windings

wave winding

winding layout

d.c. armature windings, including:

lap and wave windings, progressive and retrogressive windings

terms

preparation for rewinding, including:

checking the condition of a stripped core

core loss test

hot spots in armature core

testing commutator before use

removing of old winding

principles and construction, including:

construction of d.c. machine

d.c. machine types

types of armature windings, including parallel circuits

value of generated electromagnetic field

procedures and precautions required when inspecting, testing and/or re-using a commutator, including:

coil position and commutator segment relationship

commutator wear ring

removal of armature leads on tungsten inert gas (TIG) welded commutator

TIG welded and soft soldered commutators

selection of appropriate insulation, including:

B stage and VPI insulation

dielectric strength, temperature rating,

insulation properties, method of application and specific uses

insulations used on the slot portion and overhang

manufacturer recommendations

reason for selecting a particular insulation

simplex armature lap windings and wave windings, including:

characteristics and applications

commutator pitch

number and position of brushes

electrical power systems LV

identification of insulation specifications

relevant job safety assessments or risk mitigation processes

relevant manufacturer specifications

relevant safe working practices

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures

simplex lap windings, including equalising connections for armature windings

simplex wave windings, including dummy coils, comparison of lap and wave windings, and armature winding calculations

sustainable energy principles and practices

testing techniques, including continuity, insulation testing, use of ‘growler’ and magnetic field testing.

Range Statement

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.

Dismantling and winding armatures and field coils must include the following:

three different d.c. machines in an environment designed specifically for the purpose