NZQA registered unit standard
19471 version 4
Page 1 of 4
Title
Reassemble and test electric machines following rewinding
Level
4
Purpose
Credits
8
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 the reassembly and testing
of electric machines following rewinding.
People credited with this unit standard are able to:
–
reassemble electric machines; and
–
test electric machines.
Classification
Electrical Engineering > Electrical Machines
Available grade
Achieved
Entry information
Recommended skills
and knowledge
The Skills Organisation
SSB Code 100401
Assessment against this unit standard should not be
undertaken until competency in the following unit standards
has been achieved, or equivalent knowledge and skills
demonstrated:
Unit 750, Demonstrate knowledge of electrical test instruments
and take measurements
Unit 1184, Test, locate and diagnose faults in electrical
machine windings
Unit 6401, Provide first aid
Unit 6402, Provide resuscitation level 2
Unit 15848, Demonstrate knowledge of safeguards for use with
portable electrical appliances
Unit 15851, Demonstrate knowledge of electrical safety and
safe working practices for electrical workers
Unit 15852, Isolate and test low-voltage electrical sub-circuits
Unit standards 10933-10936 Electrical Service Technicians
Technical – A
Unit standards 10937-10940 Electrical Service Technicians
Technical – B
Unit 27349, Demonstrate knowledge of theory and legislation
for registration of electrical service technicians.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
19471 version 4
Page 2 of 4
Explanatory notes
1
Achievement of this unit standard does not by itself imply that trainees may legally
perform prescribed electrical work in their own right. Until they are registered and
licensed under the Electricity Act 1992, trainees are assisting, and must work under
the supervision of a Supervisor of Electrical Work when carrying out prescribed
electrical work. If the prescribed electrical work in question is carried out for reward
the Supervisor of Electrical Work must hold a valid practising licence.
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 recommended 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
References
Electricity Act 1992;
Electricity (Safety) Regulations 2010;
New Zealand Electrical Codes of Practice (available from Ministry of Business,
Innovation and Employment);AS/NZS 3760:2010, In-service safety inspection and
testing of electrical equipment, including Amendment 1;
4
Definitions
Current regulations and standards – those requirements of the above legislation,
standards, and codes, applied to the context in which the term is used.
Industry practice – those practices that competent practitioners within the industry
recognise as current industry best practice.
Machines – motors, generators, regulators, transformers, and other similar
equipment having windings.
Specifications – machine specifications, maintenance instructions, or bearing
manufacturer's recommendations relating to removal, cleaning, testing, and fitting of
bearings and seals, and the types of lubricants to be used.
5
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 unit.
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
Reassemble electric machines.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
19471 version 4
Page 3 of 4
Evidence requirements
1.1
Rotating components are statically and/or dynamically balanced in accordance
with specifications and industry practice.
Range
typical components – armatures, rotors, fans, pulleys.
1.2
Parts are assembled in a logical sequence in accordance with industry practice
and specifications.
1.3
Parts are aligned and set to specified tolerances.
1.4
Tightness of each fastening is verified in accordance with motor specifications
and/or industry practice.
1.5
Machine is lubricated in accordance with specifications and industry practice.
1.6
Testing of windings and internal connections is completed in accordance with
industry practice, specifications and current regulations and standards.
Outcome 2
Test electric machines.
Evidence requirements
2.1
Testing confirms that all requirements of current regulations and standards have
been met, and that the machine is safe to reconnect to the supply.
Range
2.2
Testing includes verification of machine performance against specifications or
records of previous performance, in accordance with industry practice.
Range
2.3
tests – continuity, polarity, insulation resistance, earthing;
phase sequence of three-phase supply.
typical tests – inductance, impedance, dynamometer test or in situ
connected-load test; measurements to compare power factor, line
current, speed, and output with values stated on rating plate;
temperature-rise test; checks using sight, sound, touch, vibration.
Results of tests are documented in accordance with company requirements;
and compared with manufacturers’ specifications.
Planned review date
The Skills Organisation
SSB Code 100401
31 December 2014
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
19471 version 4
Page 4 of 4
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
Review
2
22 August 2008
N/A
Rollover and
Revision
3
15 March 2012
N/A
Revision
4
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