14278 version 3
Page 1 of 4
Carry out laboratory tests on electrical insulating oil
Level
5
Credits
10
Purpose
People credited with this unit standard are able to: prepare for laboratory
tests on electrical insulating oil; set up test equipment; carry out tests on oil;
and interpret test results and complete compliance documentation.
Subfield
Electricity Supply
Domain
Electricity Supply - Testing
Status
Registered
Status date
16 April 2010
Date version published
16 April 2010
Planned review date
31 December 2014
Entry information
Open.
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 can be assessed in a workplace environment, or in a training or
educational environment if simulated equipment response and examples are able to
be provided, or in a combination of both environments.
2
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; 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.
 New Zealand Qualifications Authority 2016
14278 version 3
Page 2 of 4
3
The phrase in accordance with industry requirements is implicit in all elements and
performance criteria in this unit standard.
4
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.
5
The range of this unit standard is limited to carrying acceptance and maintenance
tests on electrical insulating oil from equipment at electricity supply Substations. The
tests are normally conducted in a laboratory.
6
Knowledge and skills underpinning the performances required by this unit standard
include – laboratory practice, dissolved gas analysis in oil, and trend analysis.
7
The following terms and abbreviations relate to this unit standard:
BS
= British Standards
IEC
= International Electrotechnical Commission
ASTM = American Society for Testing and Materials
PCB = Polychlorinated Biphenyl
DDF = Dielectric dissipation factor
DGA = Dissolved gas analysis.
Elements and performance criteria
Element 1
Prepare for laboratory tests on electrical insulating oil.
Performance criteria
1.1
The technical specifications for electrical insulating oil testing are selected and
interpreted.
Range
1.2
The test specifications and performance standards are selected.
Range
1.3
may include but are not limited to enterprise and international
standards BS 148, IEC 60422, IEC 60156, IEC 60599, IEC 60296,
IEC 60814, ASTM D924-08.
may include but are not limited to – dielectric breakdown,
interfacial tension, Carl Fisher test, colour assessment, PCB
content, acidity, DGA, moisture content, DDF resistivity.
The tests and testing procedures required are identified in terms of equipment
maker’s requirements or client testing requirements.
Range
may include but are not limited to – test procedures necessary for
carrying out the selected tests as, for example – dielectric
breakdown, interfacial tension, Carl Fisher test, colour moisture
content, DDF resistivity.
 New Zealand Qualifications Authority 2016
14278 version 3
Page 3 of 4
Element 2
Set up test equipment.
Performance criteria
2.1
The test equipment is identified, and set up and cleaned prior to use.
Range
2.2
The status of the test equipment calibration is verified for certification and
compliance.
Range
2.3
may include but is not limited to – calibration certificates being
valid, accuracy of settings.
The standard test procedures are available for reference during testing.
Range
2.4
may include but is not limited to equipment for conducting selected
tests as, for example – dielectric breakdown, interfacial tension,
Carl Fisher tests, colour moisture content, DDF resistivity.
may include but are not limited to international or client recognised
standard test procedures.
Any hazards associated with the testing are identified, and safety measures
applied and checked.
Element 3
Carry out tests on oil.
Performance criteria
3.1
The oil samples for testing are obtained in the approved secure manner ready
for testing.
Range
3.2
The relative humidity percentage tests are carried out using the selected test
procedures.
Range
3.3
may include but is not limited to – method, hygiene, contamination
avoidance, sample point, known temperature, storage.
may include but are not limited to use of the manufacturer or client
procedures for the selected test as, for example – dielectric
breakdown, interfacial tension, Carl Fisher test, colour moisture
content, DDF resistivity.
The oil tests are carried out using the approved standard procedures.
Range
may include but are not limited to – DGA, interfacial tension, DDF,
Carl Fisher test, acidity, PCB, moisture content.
 New Zealand Qualifications Authority 2016
14278 version 3
Page 4 of 4
3.4
The test results are recorded as required by client documentation.
Element 4
Interpret test results and complete compliance documentation.
Performance criteria
4.1
The documented test results are interpreted for compliance with the standard
required.
Range
4.2
may include but are not limited to – reference to manufacturer’s
guidelines, client standards, equipment comparison with previous
test results records, ensure results are within given specifications.
Compliance or non-compliance documentation is completed for each sample
tested.
Range
may include but is not limited to client documentation
requirements, which may include – analysis of what results
indicate about the main equipment, indications of equipment
faults, and recommendations for remedial work.
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.
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