NZQA registered unit standard
19469 version 5
Page 1 of 4
Title
Demonstrate knowledge of electric machine winding
Level
4
Purpose
Credits
5
This unit standard is intended for people wishing to qualify in
the electrical industry in motor rewinding and repair. It provides
the underpinning knowledge for those people who have
responsibility for the refurbishment of electric machines. This
includes dismantling, stripping, rewinding, assembling and
testing electric machines.
People credited with this unit standard are able to:
–
identify machine design features;
–
describe machine windings;
–
interpret machine manufacturer’s technical information;
–
describe coil winding and testing methods; and
–
demonstrate knowledge of insulation used in electric
machines.
Classification
Electrical Engineering > Electrical Machines
Available grade
Achieved
Explanatory notes
1
This unit standard has been developed for learning and assessment on-job.
2
This unit standard is one of a series designed to cover the rewinding of electric
machines normally removed to a motor rewinding workshop. The unit standards and
the sequence are as follows:
Unit 1206, Demonstrate knowledge of a.c. power and power factor
Unit 15850, Demonstrate knowledge of single-phase transformers
Unit 15853, Demonstrate knowledge of alternating current (a.c.) theory
Unit 15857, Demonstrate knowledge of three-phase transformers
Unit 15858, Demonstrate knowledge of a.c. motors
Unit 15863, Demonstrate knowledge of a.c. electric motor connections, starters, and
speed controllers
Unit 15865, Demonstrate knowledge of d.c. machines.
3
Definition
Machines – electric motors, generators, regulators, transformers, and other similar
equipment having windings.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
19469 version 5
Page 2 of 4
Outcomes and evidence requirements
Outcome 1
Identify machine design features.
Evidence requirements
1.1
Design features of machines are identified by inspection.
Range
design features – generator, motor, and transformer; alternating
current (a.c.) or direct current (d.c.), single-phase and threephase; cage rotor, wound rotor and slip-rings, armature and
commutator; salient poles, main poles, other poles; number of
poles.
Outcome 2
Describe machine windings.
Evidence requirements
2.1
Winding characteristics for rotor and stator are described with the aid of
diagrams.
Range
2.2
concentric, lap and wave windings.
Coil connections for each type of winding are described with the aid of
diagrams.
Range
series, parallel.
2.3
Coils per slot, coils per group, and groups per pole are described with the aid of
diagrams.
2.4
Winding connection methods are described with the aid of diagrams.
Range
star and delta; series, shunt, and compound; separate, dual,
tapped windings; progressive and regressive armature
connections.
Outcome 3
Interpret machine manufacturers’ technical information.
Evidence requirements
3.1
Data from manufacturer's technical information sheets is interpreted.
3.2
Rating plate data including the insulation class is explained.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.3
19469 version 5
Page 3 of 4
Examples of typical machine data for a.c. and d.c. motors and generators are
presented with explanations.
Range
coils per slot, number of turns per coil, direction of turns; size of
conductor; coil shape and dimensions; insulation types, thickness
and layers, coil pitch, commutator pitch.
Outcome 4
Describe coil winding and testing methods.
Evidence requirements
4.1
Winding equipment is described with the aid of diagrams with reference to
construction, set-up procedures, operation, and maintenance.
4.2
Coil winding methods are described in terms of machine types, equipment
used, advantages, and disadvantages.
4.3
Winding and connection tests are described.
Range
tests – open circuits, short-circuited turns, abnormal resistance,
inductance, impedance.
Outcome 5
Demonstrate knowledge of insulation used in electric machines.
Evidence requirements
5.1
Machine insulation materials are described in terms of machine type and
application.
Range
5.2
insulation materials – varnishes, mica and its derivatives, fibre,
tape, insulation cloths, slotlining insulations;
properties – physical strengthening and filling abilities, dielectric
strength, rigidity, imperviousness to moisture, dust, dirt, oil, and
corrosive substances.
Machine insulation selection, installation, and application methods are
described.
Range
brushing, spraying, dipping, vacuum pressure impregnation,
baking.
Replacement information
The Skills Organisation
SSB Code 100401
This unit standard and unit standard 19470 replaced unit
standard 1198.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Planned review date
19469 version 5
Page 4 of 4
31 December 2014
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
26 August 2002
31 December 2013
Revision
2
19 April 2005
31 December 2013
Review
3
22 August 2008
N/A
Rollover and
Revision
4
15 March 2012
N/A
Revision
5
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