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Title / Demonstrate knowledge of sampling, testing, treatment and spill management of substation insulating and hydraulic oils
Level / 4 / Credits / 5
Purpose / People credited with this unit standard are able to demonstrateknowledge of: insulating and hydraulic oils used in a substation; types of oil tests; insulating oil treatment processes and handling practices; the oil sampling process; the acceptance and reporting procedure; and oil spill management.
Classification / Electricity Supply > Electricity Supply -Power System Maintenance
Available grade / Achieved
Explanatory notes
1This unit standard is intended for assessment off-job. The range statements and evidence requirements across the unit standard can be applied according to industry specific equipment, procedures, and processes as applied in the electricity supply industry.
2Performance and work practices in relation to the outcomes and evidence requirements must comply with all current legislation, especially the Electricity Act 1992 and any subsequent amendments, and any regulations, codes of practice recognised under that statute, Health and Safety in Employment Act 1992, the Resource Management Act 1991, and their subsequent amendments, electricity supply industry codes of practice and documented enterprise procedures. These include the latest version ofSafety Manual – Electricity Industry (SM-EI) (Wellington: Electricity Engineers’ Association.
A full list of current legislation and industry codes is available from:
Infrastructure Industry Training Organisation
PO Box 1245
Hamilton 3240.
3The phrase in accordance with industry requirements is implicit in all outcomes and evidence requirements in this unit standard.
4Definitions
Asset owner refers to the owner of an electricity supply network that takes its point of supply from Transpower NZ, and delivers electricity to industrial, commercial and residential customers.
Industryrequirementsinclude 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.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of insulating and hydraulic oils used in a substation.
Evidence requirements
1.1Commonly used oils are identified.
Rangeinsulating, hydraulic.
1.2Properties and test specification for insulating and hydraulic oils are explained.
Outcome 2
Demonstrate knowledge of types of oil tests used for insulating and hydraulic oils.
Evidence requirements
2.1 Commonly used tests for insulating and hydraulic oils are explained.
Rangedielectric, acidity, power factor, interfacial and dissolved gas analysis, hydrogen test.
Outcome 3
Demonstrate knowledge of insulating oil treatment processes and handlingpractices.
Evidence requirements
3.1 Oil treatment processes are described.
Rangefiltration, reconditioning, reclamation, regeneration.
3.2 Oil removal, treatment and replacement handling practices are described.
RangeOil handling equipment, oil treatment units, earth bonding.
Outcome 4
Demonstrate knowledge of the insulating and hydraulic oil sampling process.
Evidence requirements
4.1 Procedure for oil sampling, and preparation of sample for testing, is described.
4.2 Hazards in oil sampling are identified.
Outcome 5
Demonstrate knowledge of the acceptance ofoil test results, and reporting documentation,to required standards.
Evidence requirements
5.1 Test results are interpreted and analysed for compliance to standards.
Rangemay include but are not limited to –international standards,
previous results, asset owner’s standards.
Evidence of one test result is required.
5.2 Requirement for compliance or noncompliancereporting documentation is described.
Outcome 6
Demonstrate knowledge of reports and planning for oil spill management.
Evidence requirements
6.1 Reports and planning for spill management aredescribed.
RangeOil Spill Management and Contingency Plan (OSMCP)
Planned review date / 31 December 2020Status information and last date for assessment for superseded versions
Process / Version / Date / Last Date for AssessmentRegistration / 1 / 17 March 2016 / N/A
Consent and Moderation Requirements (CMR) reference / 0120
This CMR can be accessed at
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 Infrastructure Industry Training Organisation at if you wish to suggest changes to the content of this unit standard.
Infrastructure ITOSSB Code 101813 / New Zealand Qualifications Authority 2018