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Replace or repair three phase electrical components
Level
4
Credits
6
Purpose
This unit standard covers the practical aspects of servicing three phase
electrical components, and is intended for use in the training of electrical
servicing technicians in the electricity supply industry.
People credited with this unit standard are able to: fault-find electrical
components and decide appropriate action; isolate electrical components;
replace or repair faulty electrical three phase components; and recommission
electrical components.
Subfield
Electricity Supply
Domain
Electricity Supply - Distribution Networks
Status
Registered
Status date
19 March 2010
Date version published
19 March 2010
Planned review date
31 December 2014
Entry information
Prerequisite: Unit 20417, Replace or repair single phase
electrical components, or demonstrate equivalent
knowledge and skills.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Electricity Supply Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0120
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
This unit standard has been designed for learning and assessment in the workplace
under the supervision of a Supervisor of Electrical Work, as defined in the Electricity
Act 1992.
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2
Competency under this unit standard does not entitle the candidate to legally perform
certain aspects of this work without the supervision of a Supervisor of Electrical
Work, until he/she has been registered under the Electricity Act 1992.
3
Performance and work practices in relation to the elements and performance criteria
must comply with all current legislation, especially the Electricity Act 1992, and any
regulations and codes of practice recognised under that statute; the Health and
Safety in Employment Act 1992; Standards Australia/ New Zealand Standards
(AS/NZS) 3760:2003, In-service safety inspection and testing of electrical equipment
,and the Resource Management Act 1991. Electricity supply industry codes of
practice and documented industry procedures include the Safety Manual – Electricity
Industry (SM-EI) Wellington: Electricity Engineers’ Association. A full list of current
legislation and industry codes is available from the Electricity Supply Industry
Training Organisation, PO Box 1245, Hamilton 3240.
4
The phrase in accordance with industry requirements is implicit in all elements and
performance criteria in this unit standard.
5
Industry requirements include all asset owner requirements; manufacturers’
specifications; and enterprise requirements which cover the documented workplace
policies, procedures, specifications, business, and quality management requirements
relevant to the workplace in which assessment is carried out.
Elements and performance criteria
Element 1
Fault-find electrical components and decide appropriate action.
Performance criteria
1.1
Fault symptoms are established by questioning of customer and/or by direct
observation.
Range
typical symptoms may include but are not limited to – visual,
sound, smell, timing of occurrences, heat sensing.
1.2
Fault-finding demonstrates a logical technique of analysing symptoms and
making measurements where necessary, to establish the cause of the problem
and locate the fault and faulty components, and follows manufacturer's
documented procedures where available.
1.3
Customer’s agreement to proceed with repairs is obtained.
Element 2
Isolate electrical components.
Performance criteria
2.1
Electricity supply is isolated.
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2.2
Isolations are tested and proved.
2.3
Isolations are clearly tagged to prevent further use.
Element 3
Replace or repair faulty electrical three phase components.
Range
three of the following – mains switch, socket outlet, permanent connection units,
flexible cords connected to any permanent connection unit, electric motors and
starters, connect and disconnect fixed wired equipment;
five examples are required for each selected component.
Performance criteria
3.1
Faulty components are removed, where possible in accordance with
manufacturer’s guidelines, without damage to other components.
3.2
Replacement components are obtained or the original components repaired as
appropriate.
3.3
Replacement or repaired components are re-installed.
Element 4
Recommission electrical components.
Performance criteria
4.1
Safety tests are completed.
Range
testing – polarity, continuity of earthing, live rated-voltage test,
current rating, operation of overload, operation of local and remote
start-stop stations, no-volt protection where appropriate, direction
of motor rotation where appropriate.
4.2
The electricity supply is reconnected.
4.3
Testing, and adjustments where appropriate, ensure that the appliance
performs according to manufacturer’s specification.
4.4
Documentation is completed and the customer advised.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
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Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP 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 Electricity Supply Industry Training Organisation info@esito.org.nz if
you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016