25041 version 1
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Demonstrate knowledge of railway signals infrastructure and signalling
systems
Level
2
Credits
4
Purpose
People credited with this unit standard are able to demonstrate knowledge of:
plug-in signalling relays; colour light signals; and mechanical signals.
Subfield
Rail Transport
Domain
Rail Infrastructure
Status
Registered
Status date
21 November 2008
Date version published
21 November 2008
Planned review date
31 December 2013
Entry information
Open.
Accreditation
Evaluation of documentation by NZQA.
Standard setting body (SSB)
Competenz
Accreditation and Moderation Action Plan (AMAP) reference
0013
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Assessment against this unit standard is to be carried out within the context of an
organisation operating under a current, valid, Rail Licence issued in accordance with
the provisions of the Railways Act 2005. The organisation’s operating rules, codes,
and instructions, referred to in this unit standard, are those the organisation has in
place to meet the requirements of the Rail Licence.
2
Legislation relevant to this unit standard includes the Health and Safety in
Employment Act 1992, and Railways Act 2005.
3
Definition
Organisational procedures refer to documents that include: worksite rules, codes,
and practices; equipment operating instructions; documented quality management
systems; and health and safety requirements.
Elements and performance criteria
 New Zealand Qualifications Authority 2016
25041 version 1
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Element 1
Demonstrate knowledge of plug-in signalling relays.
Performance criteria
1.1
Relay identification system is described in accordance with organisational
procedures.
Range
1.2
Relay components are identified and their purpose is explained.
Range
1.3
pick-up, drop-away, working.
Types of relays are described in terms of their operation and suitability for use,
in accordance with organisational procedures.
Range
1.6
front, back, armature/heel, polar.
Voltage is explained in terms of correct and safe relay operation.
Range
1.5
contacts, contact spacers/keepers, armature, pivot, residual stud,
coil, case, plugboard, seal, name plate, code pins.
Contact points are identified and their purpose is explained.
Range
1.4
standard, miniature.
must include – track, latched, neutral line, biased line, time delay,
non-vital;
may include but is not limited to – polar, AC immune, slow pick,
slow release, double element AC vane, twin.
Effect of silver migration on relays and relay components is described in terms
of system integrity.
Element 2
Demonstrate knowledge of colour light signals.
Performance criteria
2.1
Identification system used for signals is described in terms of controlled and
automatic systems.
2.2
Signal components are identified and their purpose is explained.
Range
2.3
base, mast, head/s, ladder, name plate, marker light/disc, ‘A’ light,
low-speed light, close view sector, wide-angle lens, lamp, LED
light unit.
Lamp voltage is explained in terms of correct and safe signal operation.
 New Zealand Qualifications Authority 2016
25041 version 1
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2.4
Colour light signal systems are described in terms of their operation in
accordance with organisational procedures.
Range
may include but is not limited to – double-line automatic, singleline automatic, centralised traffic control, track warrant control;
evidence of two is required.
2.5
Effect of silver migration on signal components is described in terms of system
integrity.
2.6
Placement of signal is described in accordance with organisational procedures.
Range
2.7
distance from track centre, height above rail.
Suitability of signal components is described in accordance with organisational
procedures.
Range
base, mast, head/s, lens/es.
Element 3
Demonstrate knowledge of mechanical signals.
Performance criteria
3.1
Identification system used for signal equipment is described in accordance with
organisational procedures.
3.2
Signal components are identified and their purpose is explained in terms of their
function and operation.
Range
may include but is not limited to – base, mast, arm/s, ladder, lamp,
lens, shunting disc target, reflectorised switch stand indicator.
3.3
Mechanical signals are described in terms of their operation in accordance with
organisational procedures.
3.4
Placement of signal is described in accordance with organisational procedures.
Range
3.5
distance from track centre, height above rail.
Suitability of signal components is described in accordance with organisational
procedures.
Range
may include but is not limited to – base, mast, arm/s, lens/es,
reflectorised tape.
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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 Competenz qualifications@competenz.org.nz if you wish to suggest
changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016