14347 version 2
28-Jun-16
1 of 8
ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
level:
3
credit:
3
planned review date:
December 2006
sub-field:
Electricity Supply
purpose:
People credited with this unit standard are able to: prepare
for inspection and servicing on high voltage static capacitor
banks and capacitive signal injection equipment; carry out
routine inspections and diagnostic tests; carry out servicing,
complete documentation; and return equipment to service.
entry information:
Prerequisites: Unit 14287, Use and maintain test equipment
used in the high voltage electrical industry; Unit 14700, Apply
and remove safety measures in an electricity supply
environment; Unit 12296, Apply earths to and remove earths
from electrical conductors, plant, and equipment; or
demonstrate equivalent knowledge and skills.
Core electrical theory is essential knowledge underpinning
the performances required by this unit standard.
accreditation option:
Evaluation of documentation and visit by NZQA and industry.
moderation option:
A centrally established and directed external moderation
system has been set up by the Electricity Supply Industry
Training Organisation.
 New Zealand Qualifications Authority 2016
14347 version 2
28-Jun-16
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ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
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, codes of practice recognised
under that statute, Health and Safety in Employment
Act 1992, Building Act 1991, Resource Management
Act 1991, and their subsequent amendments; Electricity
Regulations 1997, Safety Rules Electricity Industry:
Safety Rules for the New Zealand Electricity
Generation, Transmission and Distribution Industry.
(2000) Wellington: Electricity Engineers’ Association of
NZ (SR-EI), and General Safety Guide Electricity
Industry: Guidance on General Safety in the New
Zealand Electricity Generation, Transmission and
Distribution Industry. (2000) Wellington: Electricity
Engineers’ Association of NZ (GSH-EI); Electricity
Engineers’ Association Codes of Practice; Occupational
Safety and Health Approved Codes of Practice; New
Zealand Electrical Codes of Practice (NZECP). A full
list of current legislation and industry codes is available
from:
Electricity Supply Industry Training Organisation
PO Box 1245
HAMILTON.
3
Reference to terms, procedures, and specifications in
this unit standard may be taken as including
documented procedures and specifications relevant to
the workplace in which assessment is carried out.
 New Zealand Qualifications Authority 2016
14347 version 2
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ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
4
All work practices shall meet documented enterprise
maintenance standards, including the quality
management requirements, and the documentation of
activities, events, and decisions.
5
The range of this unit standard is limited to carrying out
routine inspection and servicing of high voltage
capacitor banks and capacitive signal injection
equipment installed at electricity supply substations.
6
The following terms and abbreviations relate to this unit
standard:
PCB
=
Poly Chlorinated Biphenyl
DGA
=
Dissolved gas analysis
CTs
=
Current transformers.
Elements and Performance Criteria
element 1
Prepare for inspection and servicing on high voltage static capacitor banks and capacitive
signal injection equipment.
performance criteria
1.1
The task - appropriate equipment drawings, manuals and procedures are
selected.
Range:
may include but not limited to manufacturer’s manuals, client
information and maintenance standards, enterprise procedures for
inspecting and servicing - static capacitor banks, capacitive signal
injection equipment.
 New Zealand Qualifications Authority 2016
14347 version 2
28-Jun-16
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ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
1.2
The task - appropriate equipment, and specified tools are made ready.
Range:
1.3
The anticipated replacement spare parts are made available in time for the
work.
Range:
1.4
includes the correct and timely completion of all the prescribed
equipment release requests.
Maintenance documentation is prepared and the known defect and service
history is available.
Range:
1.6
includes the completion of the necessary documentation, where
required, to uplift client held spares.
The requests for release of operational equipment are placed.
Range:
1.5
may include those special tools identified in work procedures or
manufacturer’s manuals.
may include but not limited to - any information concerning any
known previous problems or defects, client or enterprise
inspection and servicing requirements, check for PCB free
insulating liquid.
The access to the equipment is provided and is consistent with client or
enterprise rules.
Range:
may include but not limited to - access permit or its equivalent,
isolation points checked, earthing applied, individual capacitor
discharge prior to handling.
 New Zealand Qualifications Authority 2016
14347 version 2
28-Jun-16
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ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
element 2
Carry out routine inspection and diagnostic tests.
performance criteria
2.1
The capacitor bank defect history and operational records are scrutinised, and
incidents indicating service needs noted for attention during routine servicing.
Range:
2.2
The inspections are carried out to identify servicing needs.
Range:
2.3
may include but not limited to - identify failed capacitors, leaking
capacitors, out of range capacitance valve, signs of over heating,
DGA on oil results, bird nests, blown fuses, bus insulators for
supporting capacitors damaged, resistance of resistor reactor
units, insulation tests.
The diagnostic test results are analysed to identify servicing needs.
Range:
2.4
may include but not limited to - filter bank, tuning drift and
diagnostic tests, failed capacitors, bank trippings.
may include but not limited to - replacement of failed or out of
range capacitors, excess work components replaced, replace or
repair oil leaks, cleaning of porcelain insulators, removal of bird
nests, checking balanced arm bank tuning by verifying
capacitance valves, resistor reactor units oil changes or treatment,
connection leads and bus clamps tightened.
The results of the diagnostic tests are recorded to meet the client’s
requirements.
Range:
may include but not limited to - completing selected client or
enterprise check lists, electronic data records, client reports.
 New Zealand Qualifications Authority 2016
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ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
element 3
Carry out servicing.
performance criteria
3.1
The servicing identified by selected procedures, inspection and diagnostic tests
is completed.
Range:
may include but not limited to - replacement of failed or out of
range capacitors, excess work components replaced, replace or
repair oil leaks, cleaning of porcelain insulators, removal of bird
nests, checking balanced arm bank tuning by verifying
capacitance valves, resistor reactor units oil changes or treatment,
connection leads and bus clamps tightened.
3.2
The servicing is completed to client requirements.
3.3
The equipment is re-assembled to the ‘service ready’ state.
Range:
may include but not limited to - all test equipment removed, all
capacitors in correct position, all leads re-connected and secure,
resistor reactor units filled with oil, CTs re-connected, cooling
system ready for service, function tests carried out if necessary.
element 4
Complete documentation.
performance criteria
4.1
The ‘as left’ conditions are recorded in the equipment history.
Range:
may include but not limited to - reporting defects found, spares
used, tuning adjustments made, results of inspections requiring
more extensive maintenance, corrosion corrective work.
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ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
4.2
The routine inspection diagnostic testing and servicing records are completed to
meet client requirements.
Range:
may include but not limited to written records or electronic data
reporting.
element 5
Return equipment to service.
performance criteria
5.1
The equipment is returned to service consistent with the enterprise guidelines.
Range:
may include but not limited to - equipment checked for ready for
service, all inspection and servicing tools removed, access
authorisation returned, equipment returned to service without
incident, bank balance and tuning checked when back on system
voltage.
Comments on this unit standard
Please contact the Electricity Supply Industry Training Organisation ceo@esito.org.nz if
you wish to suggest changes to the content of this unit standard.
Please Note
Providers must be accredited by the Qualifications Authority or a delegated interinstitutional body before they can register credits from assessment against unit standards
or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by the Qualifications Authority 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.
 New Zealand Qualifications Authority 2016
14347 version 2
28-Jun-16
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ELECTRICITY SUPPLY - POWER
SYSTEM MAINTENANCE
Carry out routine inspection and service
of high voltage capacitor banks and
signal injection plant
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 providers wishing to
develop education and training programmes, such as minimum qualifications for tutors and
assessors, and special resource requirements.
This unit standard is covered by AMAP 0120 which can be accessed at
http://www.nzqa.govt.nz/site/framework/search.html.
 New Zealand Qualifications Authority 2016