NZQA registered unit standard
1185 version 7
Page 1 of 4
Title
Prepare electrical machines for rewinding
Level
4
Purpose
Credits
6
This unit standard is intended for people wishing to qualify in
the electrical industry in motor rewinding and repair. It is for
people who have responsibility for preparing machines for
rewinding.
People credited with this unit standard are able to:
– dismantle and inspect electrical machines;
– strip out windings;
– refurbish casing; and
– prepare armature/rotor and/or yoke.
Classification
Electrical Engineering > Electrical Machines
Available grade
Achieved
Explanatory notes
1
This unit standard has been developed for learning and assessment off-job.
2
This unit standard is one of a series designed to cover the rewinding of electrical
machines normally removed to a motor rewinding workshop. The unit standards and
the sequence are as follows:
Unit 1184, Test, and locate and diagnose faults in electrical machine windings
Unit 1185, Prepare electrical machines for rewinding
Unit 19470, Rewind electric machines
Unit 19471, Reassemble and test electric machines following rewinding.
Reinstallation and commissioning are covered in:
Unit 2014, Overhaul a.c. rotating machines and control equipment
Unit 5928, Overhaul d.c. rotating machines and control equipment.
3
Definitions
Industry practice – those practices that competent practitioners within the industry
recognise as current industry best practice.
Electrical machines – are defined as electric motors, generators, alternators, and
transformers.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
4
1185 version 7
Page 2 of 4
Assessment
a The machines chosen are left to the discretion of the assessor, but must be
sufficient to assess competence in all outcomes of the standard.
b Performance in relation to the outcomes of this unit standard must comply with the
Health and Safety in Employment Act 1992, associated regulations, and any
applicable company safety and health procedures.
Outcomes and evidence requirements
Outcome 1
Dismantle and inspect electrical machines.
Evidence requirements
1.1
Position of components is recorded in accordance with industry practice.
1.2
Air gap is checked for uniformity.
1.3
Cause of a non-uniform air gap is identified.
Range
typical causes – worn or misaligned bearings, bearing journals, or
housings; bent shaft.
1.4
Components are cleaned and, where appropriate, degreased with suitable
solvents in accordance with industry practice.
1.5
Visual inspection of all components is carried out to assess wear and
deterioration.
Range
may include but is not limited to –
for wear – bearings, brushgear, commutator, slip-rings, centrifugal
switches, rotor and stator surfaces;
for deterioration – insulation, seals, gaskets, air passages,
terminations, fasteners, casings, capacitors.
Outcome 2
Strip out windings.
Evidence requirements
2.1
Winding data is collected and recorded in accordance with industry practice.
Range
2.2
coils per slot, coil turns and polarities; size of conductor; insulation
types, thickness and layers; coil dimensions and shapes;
connections.
Tools and equipment used match the type of windings.
Range
The Skills Organisation
SSB Code 100401
cutting and stripping tools, warming and pulling equipment; may
include burnout oven.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2.3
1185 version 7
Page 3 of 4
Cutting and stripping methods match the machine.
Range
generators, motors, transformers.
2.4
Slots are left clean.
2.5
Machine frame and laminations are undamaged.
2.6
Core is tested in accordance with industry practice.
Outcome 3
Refurbish casing.
Evidence requirements
3.1
Casing is stripped and cleaned.
Range
prepare casing surface (any appropriate method), burning, heat.
3.2
Casing is inspected for warping or dents and repaired where required.
3.3
Casing is masked and coated.
may include but is not limited to – powder coat, spray paint, hand
paint.
Range
Outcome 4
Prepare armature/rotor and/or yoke.
Evidence requirements
4.1
Armature/rotor and/or yoke is cleaned and prepared for windings.
4.2
Armature/rotor and/or yoke is inspected for damage or wear.
Planned review date
31 December 2014
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
29 April 1994
31 December 2013
Review
2
23 April 1996
31 December 2013
Revision
3
3 April 2001
31 December 2013
Review
4
26 August 2002
31 December 2013
Review
5
22 August 2008
N/A
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1185 version 7
Page 4 of 4
Process
Version
Date
Last Date for Assessment
Rollover and
Revision
6
15 March 2012
N/A
Revision
7
15 January 2014
N/A
Consent and Moderation Requirements (CMR) reference
0003
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact The Skills Organisation reviewcomments@skills.org.nz if you wish to
suggest changes to the content of this unit standard.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016