14345 version 3
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Carry out routine inspection and servicing on substation air
compressor systems
Level
3
Credits
4
Purpose
People credited with this unit standard are able to: prepare for inspection and
servicing on substation air compressor systems; carry out routine inspection
tasks; apply routine servicing; and return equipment to service.
Subfield
Electricity Supply
Domain
Electricity Supply - Power System Maintenance
Status
Registered
Status date
27 April 1998
Date version published
20 June 2008
Planned review date
31 December 2009
Entry information
Prerequisites: Unit 14287, Use and maintain test
instruments used within the high voltage electrical
industry; Unit 14700, Apply and remove safety measures
in an electricity supply environment; 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 can be assessed against 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.
 New Zealand Qualifications Authority 2016
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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) (2004) 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.
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 industry and workplace documented policies,
procedures, specifications, and business and quality management relevant to the
workplace where assessment is carried out.
5
All work practices shall meet documented enterprise maintenance standards,
including the quality management requirements, and the documentation of activities,
events, and decisions.
6
The range of this unit standard is limited to carrying out preventative maintenance
inspection and servicing to substation air compressor and storage systems normally
applied at electricity supply substations.
Elements and performance criteria
Element 1
Prepare for inspection and servicing on substation air compressor systems.
Performance criteria
1.1
The scope of work and equipment is identified and the required documents
selected.
Range
1.2
includes associated ‘check or inspection lists’, manufacturer
manuals and procedures, client service standards for – circuit
breaker compressors, air storage systems.
The required work control system, or approved equivalent, is received, checked,
and signed.
Range
includes a careful check of the isolations to ensure the access
permit or recognised equivalent provides a safe work environment,
and may include sectionalising to maintain air services to other
equipment.
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1.3
All safety measures are in place to eliminate, minimise, or control hazards in the
permit area.
Range
1.4
includes inspection of the safe working zone to ensure this safe
work area has been correctly delineated and provides a safe work
environment.
Past service records and defect history are evaluated to determine likely
servicing needs.
Range
may include but is not limited to – running hours, recorded inservice problems, operator reports, recent major overhauled units.
Element 2
Carry out routine inspection tasks.
Performance criteria
2.1
Personnel and equipment are resourced for the required work.
Range
2.2
Inspection tasks are completed according to the selected standard and
procedures.
Range
2.3
may include but is not limited to – people, tools, spares, materials,
‘inspection sheets’, procedure sheets.
may include but is not limited to – inspections for clean and free of
abnormal noise and vibration, fly wheels and pulleys running true,
pipe work free of corrosion and damage, safety guards firmly in
place, cooling system working effectively, oil filters clean, electric
motor free of signs of over heating, oil pressure and temperature
to manufacturer’s specifications, oil level correct, inlet and
discharge filters clean, control circuits working correctly to maker’s
specifications, moisture traps and pressure reducing valves reseal correctly, alarm signals function.
The results of the inspections are analysed to determine the servicing required.
Range
includes but is not limited to – cleaning, cylinder head valves
checked, cylinder head gaskets checked, cooling water sensor
checks, crankcase heater operating correctly, lubricating system
working, cooling water and anti-freeze change, cooling system
sacrificial rods change, oil pressure switches operate, pressure
gauges operate accurately, safety warning system operates
correctly, motor electrical connections sound, compressor unloader working correctly, belt drive and coupling free of wear,
foundation bolts tight and free of corrosion, cabinet wiring and
earthing tight, regulating valve operates reliably.
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2.4
The compressed air storage system inspections meet the selected standard
and procedures.
Range
may include but is not limited to – evidence of regular de-watering
from moisture traps, air drying systems are working effectively,
compressed air storage tanks have been safely inspected,
corrosion, damage.
Element 3
Apply routine servicing.
Performance criteria
3.1
Routine servicing is completed, with all the work identified during diagnostic
inspections done to standard.
Range
3.2
may include but is not limited to – cleaning, cylinder head valves
checked, cylinder head gaskets checked, cooling water sensor
checks, crankcase heater operating correctly, lubricating system
working, cooling water and anti-freeze change, cooling system
sacrificial rods change, oil pressure switches operate, pressure
gauges operate accurately, safety warning system operate
correctly, motor electrical connections sound, compressor unloader working correctly, belt drive and coupling free of wear,
foundation bolts tight and free of corrosion, cabinet wiring and
earthing tight, regulating valve operates reliably.
The record of servicing is completed and meets client or enterprise
requirements.
Range
may include but is not limited to – relating running hours to the
service and parts fitted, adjustments made, condition found.
Element 4
Return equipment to service.
Performance criteria
4.1
All tools and other applied safety measures are removed from the equipment.
Range
4.2
may include but is not limited to – restoring motor fuses, control
circuit isolation, compressed at isolation.
All equipment worked on is inspected and set for return to service.
Range
includes confirming all equipment and the work party are clear and
all operational equipment which has been worked on is left in the
‘in-service’ condition.
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4.3
Return of the work control permit, or its equivalent, is confirmed.
Range
4.4
includes confirming all members of the work party are clear of the
equipment.
Equipment is returned to operational service.
Range
may include but is not limited to the equipment being successfully
returned to service without incident.
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