NZQA registered unit standard
28110 version 1
Page 1 of 3
Title
Demonstrate knowledge of electrical cost consumption, and a.c.
theory as it applies to the electricity supply industry
Level
3
Credits
4
Purpose
People credited with this unit standard are able to demonstrate
knowledge of: electrical power, energy, and cost of
consumption; inductance and capacitor in a.c. circuits.
Classification
Electricity Supply > Electricity Supply - Core Skills
Available grade
Achieved
Explanatory notes
1
This unit standard is intended for assessment off-job. The range statements across
the unit standard can be applied according to industry specific equipment,
procedures, and processes in the electricity supply industry.
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 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, Safety Manual – Electricity Industry (SM-EI) (2004) Wellington: Electricity
Engineers’ Association.
A full list of current legislation and industry codes is available from:
Infrastructure Industry Training Organisation
PO Box 1245
HAMILTON.
4
This unit standard is intended for use in the assessment of Cable Jointers,
Distribution and Transmission Line Mechanics, and all terminology should be related
to that sector of the industry.
5
The phrase in accordance with industry requirements is implicit in all outcomes and
evidence requirements in this unit standard.
Infrastructure Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
28110 version 1
Page 2 of 3
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of electrical power, energy, and cost of consumption.
Evidence requirements
1.1
Electrical power is defined in terms of voltage, current, and resistance. Unit and
symbol are stated.
1.2
Electrical energy is defined in terms of power and time taken. Units and
symbols are stated.
1.3
Electrical energy consumption costs are calculated from given data for simple
domestic installations, and expressed in kilowatt-hours and cost in dollars.
Outcome 2
Demonstrate knowledge of inductance and capacitor in a.c. circuits.
Evidence requirements
2.1
Characteristics and effects of inductors in a.c. circuits are described.
Range
2.2
Practical applications of inductors in a.c. power circuits are described.
Range
2.3
current limiting, smoothing, power factor correction, voltage
control.
Characteristics and effects of capacitors in a.c. circuits are described.
Range
2.4
phase relationship between supply current and voltage, inductive
reactance.
capacitive reactance, phase relationship between supply voltage
and current.
Practical application of capacitors in a.c. power circuits.
Range
power factor, reducing of arcing, voltage control.
2.5
The dangers and safety requirements of using inductors and capacitors in a.c.
power circuits are explained.
2.6
Impedance is defined in terms of the combined effects of resistance and
reactance in an a.c. circuit.
Infrastructure Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2.7
28110 version 1
Page 3 of 3
Calculations involving inductance, capacitance and resistance combinations in
series are carried out.
Range
impedance, supply current, voltage drops across individual
components, phase angle, power factor.
Planned review date
31 December 2018
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
20 March 2014
N/A
Consent and Moderation Requirements (CMR) reference
0120
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
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
qualifications@infrastructureito.org.nz if you wish to suggest changes to the content of this
unit standard.
Infrastructure Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016