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Design a high voltage (HV) electricity meter installation
Level
5
Credits
5
Purpose
People credited with this unit standard are able to: demonstrate knowledge of
electricity metering installation design; prepare scope of work for electricity
metering installation design; calculate theoretical values for electricity meters;
select electricity meters for installation; and produce and amend electricity
metering design drawings.
Subfield
Electricity Supply
Domain
Electricity Supply - Metering
Status
Registered
Status date
27 May 2002
Date version published
23 April 2007
Planned review date
31 December 2012
Entry information
Recommended: Unit 19316, Design a current
transformer (CT) electricity meter installation, 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 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 a priority throughout the assessment. If the
safety requirements are not met the assessment must stop and the candidate will be
assessed as not yet competent.
3
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
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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.
4
‘Industry requirements’ include all industry and workplace documented policies,
procedures, specifications, business, and quality management requirements relevant
to the workplace in which assessment is carried out.
5
Practical exercises should be used for training and assessment wherever possible.
6
‘High voltage’ (HV) covers a metering installation using instrument transformers to
reduce primary voltages.
Elements and performance criteria
Element 1
Demonstrate knowledge of electricity metering installation design.
Performance criteria
1.1
Wiring materials and connection blocks are described in accordance with
industry requirements.
Range
includes but is not limited to – conductor size and type, rating.
1.2
Wiring numbering allocation requirements are described in accordance with
industry requirements.
1.3
Generic design templates are described in accordance with industry
requirements.
1.4
Selection and application of fuses for metering installations is described in
accordance with industry requirements.
Range
1.5
may include but is not limited to – HV fusing of voltage
transformers, low voltage fusing, sub-circuit fusing, accessory
fusing, types of fuses, fuse holders.
Fusing characteristics for current discrimination are described in accordance
with industry requirements.
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Element 2
Prepare scope of work for electricity metering installation design.
Performance criteria
2.1
Scope of work is prepared in accordance with industry codes and industry
requirements.
Range
2.2
Permissible load is assessed in accordance with industry requirements.
Range
2.3
includes but is not limited to – industry agreement, codes of
practice.
includes but is not limited to – selection of voltage transformer
ratios, range selection, overload considerations.
Voltage transformer class and burdens are applied in accordance with industry
requirements.
Range
includes but is not limited to – manufacturer’s specifications,
accuracy and ratio to suit design.
Element 3
Calculate theoretical values for electricity meters.
Range
voltage transformer burden and loadings; current transformer burden and
loadings.
Performance criteria
3.1
Electricity meter theoretical values are calculated in accordance with industry
requirements.
3.2
Maximum demand of metering installation is determined in accordance with
industry requirements.
Range
maximum load, initial load, ultimate load, maximum permissible
load.
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Element 4
Select electricity meters for installation.
Range
includes but is not limited to – voltage transformer compatibility, current
transformer compatibility.
Performance criteria
4.1
Meter is selected in accordance with installation and industry requirements.
Range
4.2
includes but is not limited to – manufacturers’ specifications,
installation requirements, meter inputs and outputs, class of
operation, integral data loggers.
Meter communication principles are described and applied to meter selection in
accordance with industry requirements.
Range
may include but is not limited to – modems, communications
networks, cellular telephone network, Local Area Network (LAN),
line, approved type, security, modem selection, communication
protocol.
Element 5
Produce and amend electricity metering design drawings.
Performance criteria
5.1
Key meter installation requirements are defined in accordance with industry
requirements.
Range
5.2
includes but is not limited to – fuses, wiring, meters, numbering
systems, communication equipment.
Electricity metering installation drawings, symbols and polarity markings are
produced, interpreted and amended in accordance with industry requirements.
Range
includes but is not limited to – voltage transformer polarity, indoor
and outdoor equipment, switchboard components, meter
installation components.
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.
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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