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Maintain computer based and solid state interlocking equipment in
position in a rail environment
Level
4
Credits
5
Purpose
People credited with this unit standard are able to, in a rail environment:
prepare for the maintenance of computer based and solid state interlocking
equipment; monitor system; diagnose faults and replace faulty modules;
monitor, test, and adjust equipment.
Subfield
Rail Transport
Domain
Rail Infrastructure
Status
Registered
Status date
21 May 2008
Date version published
21 May 2008
Planned review date
31 December 2013
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
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
Candidates must first hold the appropriate licence, qualification, and/or certification
for any electrical work undertaken in the course of assessment for this unit standard.
This condition will be in accordance with organisational procedures and/or regulatory
requirements that govern live electrical work. Examples include: electrical service
technician (A, B), registered electrician.
 New Zealand Qualifications Authority 2016
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3
Legislation relevant to this unit standard includes the Health and Safety in
Employment Act 1992, Railways Act 2005, Resource Management Act 1991,
Electricity Act 1992, Electricity Regulations 1997.
4
The following Code of Practice applies to this unit standard:
NZECP 60:1997, New Zealand Electrical Code of Practice for Inspection, Testing
and Certification of Low Voltage A.C. Railway Signalling Control Circuits, Ministry of
Commerce, Wellington.
5
Computer based and solid state interlocking equipment may include but is not limited
to: Westrace, VPI, Microlock systems.
6
Computer and solid state equipment modules may include but are not limited to:
main panel processor; panel processor module; DPM, CPU cards; I/O devices;
memory modules.
7
Maintenance is to be undertaken on at least three occasions, using one or more
items of computer based and solid state interlocking equipment and their respective
modules.
8
Tools and equipment for maintenance purposes may include but are not limited to:
crimping tools; wire strippers; soldering irons/flux; printed circuit boards; modules;
power supplies; computer equipment; diagnostic terminals; relays; cubicles; racks;
brackets; cabling/connections; static protection devices.
9
Operations may:
 be conducted by day or night in all relevant weather conditions;
 be conducted in restricted spaces or exposed conditions or controlled or open
environments.
 involve exposure to chemicals, dangerous or hazardous substances and
movements of equipment, materials and vehicles.
10
Competenz acknowledges the assistance provided by the Transport and Logistics
Industry Skills Council in permitting unit of competency TDTB5501A, Maintain
Computer Based and Solid State Interlocking Equipment to be used as the basis for
this unit standard.
11
Definitions
In position refers to equipment located in its usual place within the rail network, as
opposed to being temporarily off-site in, for example, an engineering workshop or
other maintenance facility.
Organisational procedures refer to documents that include: worksite rules, codes,
and practices; equipment operating instructions; routine maintenance schedules;
technical specifications; documented quality management systems; material safety
data sheets (MSDS), maintenance schedules; and health and safety requirements.
 New Zealand Qualifications Authority 2016
24036 version 1
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Elements and performance criteria
Element 1
Prepare for the maintenance of computer based and solid state interlocking equipment.
Performance criteria
1.1
Relevant instructions and information are accessed in accordance with job
requirements and organisational procedures.
1.2
Work is planned to ensure safe maintenance activities and minimum disruption
to train operations.
Range
1.3
may include but is not limited to – rail permissions, track
protection, Train Control bulletins, local work schedules, train
movements, special circumstances.
Personal protective equipment (PPE) is used in accordance with organisational
requirements.
Range
may include but is not limited to – high visibility clothing, hearing
protection, gloves, sunscreen, sunglasses, safety glasses, insect
repellent, safety headwear, safety footwear, portable radios, hand
lamps, flags.
Element 2
Monitor system.
Performance criteria
2.1
Up-to-date reports of fault logs are gained by accessing the diagnostics
terminal.
Range
fault logs may include but is not limited to – indicators, displays,
print outs;
diagnostics terminal may include but is not limited to – technician's
terminal, VDU, hand held terminal, PC or laptop computer.
2.2
Fault correction activities are prioritised by reviewing the fault reports and
corrective actions are implemented in accordance with organisational
procedures.
2.3
Records of previously actioned faults are deleted/cleared from the terminal in
accordance with organisational procedures.
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Element 3
Diagnose faults and replace faulty modules.
Performance criteria
3.1
The source of the fault is correctly identified by assessing the diagnostics
terminal.
3.2
The corrective action required is determined in accordance with fault type and
organisational procedures.
3.3
Actioned faults are deleted/cleared from the terminal.
3.4
Faulty modules are correctly identified and removed as per organisational
procedures.
3.5
Replacement component is obtained from spare stock in accordance with fault
type and organisational procedures.
3.6
Replacement modules are correctly installed, connected, and equipment is
powered up as per organisational procedures.
Element 4
Monitor, test, and adjust equipment.
Range
test instruments may include but is not limited to – message
generator/interrogator, oscilloscope, personal computer, go/no go tester.
Performance criteria
4.1
Correct calibration of test instruments is verified in accordance with
organisational procedures.
4.2
Correct test procedures are identified and implemented to confirm all operations
are in accordance with organisational procedures.
4.3
Equipment operations are monitored to ensure system integrity.
Range
system integrity may include but is not limited to – any/all aspects
of the installations, housing, connections and operations as
defined by the relevant organisational procedures.
4.4
Signal and voltage levels are monitored, checked, and adjusted if required to
ensure compliance with organisational procedures.
4.5
Complete statistical records and equipment/operational management
information is accurately recorded and maintained in accordance with
organisational procedures.
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Element 5
Organise repair or replacement of faulty equipment.
Performance criteria
5.1
Non-conforming equipment is identified and tagged for repair type and extent of
fault is identified and recorded as per organisational procedures.
Range
5.2
tagging may include but is not limited to – stickers, cardboard
labels, attached reports.
Faulty equipment requiring repair is segregated and appropriate records are
completed in preparation for dispatch to repairer.
Range
records may include but are not limited to – hard copy, electronic
files, packaging slips, transmittal documents, fault records,
equipment faults/maintenance history.
5.3
Spare equipment stocks are reviewed to ensure adequate availability.
5.4
Priority for repair or replacement of equipment is established by evaluation of
stock levels and fault logs.
5.5
Appropriate personnel are notified as to repair or replacement priorities in
accordance with organisational procedures.
Range
appropriate personnel may include but is not limited to –
technicians, supervisors, stores personnel.
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 Competenz qualifications@competenz.org.nz if you wish to suggest
changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016