NZQA registered unit standard
14272 version 4
Page 1 of 5
Title
Carry out maintenance and/or acceptance tests on high voltage
circuit breakers
Level
4
Credits
6
Purpose
People credited with this unit standard are able to: prepare to
test high voltage circuit breakers for maintenance and/or
acceptance; set up test equipment; carry out maintenance
and/or acceptance tests on high voltage circuit breakers;
interpret test results and complete compliance documentation;
and place equipment in, or return equipment to, service.
Classification
Electricity Supply > Electricity Supply - Testing
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Unit 14287, Use and maintain test instruments used within the
high voltage electrical industry; and Unit 14294, Carry out
insulating oil sampling and voltage breakdown tests
Explanatory notes
1
This unit standard is intended for, but not restricted to, workplace assessment. The
range statements across the unit standard can be applied according to
industry-specific equipment, procedures, and processes.
2
Safety of personnel and plant must be prioritised during assessment against this unit
standard. If the client safety requirements are not met assessment must stop.
3
Performance of the evidence requirements 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; and
the Resource Management Act 1991. Electricity supply industry codes of practice
and documented industry procedures include the current version of 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.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
14272 version 4
Page 2 of 5
4
The phrase in accordance with industry requirements applies to all of the evidence
requirements in this unit standard.
5
Industry requirements include all asset owner requirements; manufacturers’
specifications; and enterprise requirements. Enterprise requirements may include
the documented workplace policies, procedures, specifications, business, and quality
management requirements relevant to the workplace in which assessment is carried
out.
6
Practical exercises should be used for assessment wherever possible.
7
This unit standard covers carrying out maintenance tests on a range of high voltage
circuit breakers. Testing is normally applied at electricity supply substations.
8
Definitions
SF6 = Sulphur Hexafloride Gas
GIS = Gas Insulated Switchgear.
Outcomes and evidence requirements
Outcome 1
Prepare to test high voltage circuit breakers for maintenance and/or acceptance.
Evidence requirements
1.1
The equipment technical specification and performance standards are selected
and interpreted in terms of client test requirements.
Range
1.2
The test specifications and performance standards are selected in terms of
client test requirements.
Range
1.3
may include but is not limited to – bulk oil, minimum oil, SF6, air
blast, vacuum, metal clad, pole mounted recloser and GIS circuit
breaker types; rating, method of operation, relevant drawings.
may include but is not limited to – operation timing, minimum
operating voltage, insulation test, power factor, contact resistance,
function tests, pole discrepancy, anti-pumping checks, trip tests,
auxiliary contacts tested, liquid or gas insulation electric strength,
protection operation tests;
evidence is required of preparation for six types of tests.
The selected test circuitry and inspection requirements are identified in terms of
client test requirements.
Range
may include but is not limited to – equipment necessary for
carrying out the selected tests, trip and close circuits are identified
in mechanism cabinet, control circuit is identified as isolated.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.4
14272 version 4
Page 3 of 5
The extent of main equipment to be released from service is identified and
equipment operational release is requested for the testing work.
Range
includes but is not limited to – completing all operational requests
in a timely and correct manner.
Outcome 2
Set up test equipment.
Evidence requirements
2.1
An access permit, or its approved equivalent, is obtained and a safe work zone
is identified.
Range
2.2
The selected circuit and test equipment is assembled to be ready for testing.
Range
2.3
may include but is not limited to – placing boundary markers
around the work area, identifying secondary de-energising
required to make the testing work safe.
may include but is not limited to – in accordance with
manufacturer’s guidelines, client operating and maintenance
standards and testing procedures;
includes – an inspection of test equipment.
The selected test procedures are obtained from previous testing and are made
available for use during testing.
Range
may include but are not limited to – previous test results, history
card, manufacturer’s information and operating procedures.
2.4
All test equipment is checked to ensure that the calibration certification is valid.
2.5
Any hazards associated with the testing are identified and safety measures are
prepared and implemented.
Range
hazards may include but are not limited to – charged capacitors,
auxiliary services, high pressure systems, risk of trip to other
equipment and alarms, control circuits and interlocks;
safety measures include but are not limited to – discharged
capacitors, isolated auxiliary services, isolated high pressure
systems, identified risk of trip to other equipment and alarms,
identified control circuits and interlocks.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
14272 version 4
Page 4 of 5
Outcome 3
Carry out maintenance and/or acceptance tests on high voltage circuit breakers.
Evidence requirements
3.1
Six tests are carried out in accordance with the standard procedures and
following the commissioning plan, or as specified by the client.
Range
3.2
may include but is not limited to – operation timing, minimum
operating voltage, insulation test, power factor, contact resistance,
function tests, pole discrepancy, anti-pumping checks, trip tests,
auxiliary contacts tests, liquid or gas insulation electric strength,
protection operation tests.
The results of the tests and inspections are recorded as required by standard
documentation or as specified by the client.
Outcome 4
Interpret test results and complete compliance documentation.
Evidence requirements
4.1
The documented test results are interpreted and analysed for compliance with
the standard required.
Range
4.2
may include but is not limited to – reference to manufacturer’s
requirements, client standards, records of previous results, ensure
results are within given specifications.
Compliance or non-compliance documentation is completed for each unit
tested.
Range
may include but is not limited to – manufacturer’s requirements,
client documentation requirements, recommendations for remedial
work.
Outcome 5
Place equipment in, or return equipment to, service.
Evidence requirements
5.1
The equipment being tested is safely placed in, or returned to, service.
Range
includes but is not limited to checks to ensure – all test equipment
and leads have been removed; all reconnection work is completed;
main leads are reinstated correctly, checked and secure; all
equipment is left in a state ready for service; the access permit is
returned; the equipment is returned to service without incident.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Planned review date
14272 version 4
Page 5 of 5
31 December 2015
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
27 April 1998
31 December 2012
Revision
2
11 February 2004
31 December 2012
Review
3
19 May 2006
31 December 2012
Review
4
8 December 2011
N/A
Consent and Moderation Requirements (CMR) reference
0120
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 Electricity Supply Industry Training Organisation info@esito.org.nz if
you wish to suggest changes to the content of this unit standard.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016