Unit of competency details

UETTDRRT28A - Maintain overhead traction components and equipment (Release 1)


Usage recommendation:
Supersedes and is equivalent to UETTDRRT08B - Maintain overhead traction equipment and components 30/Apr/2012
Is superseded by and equivalent to UETTDRRT28 - Maintain overhead traction components and equipment 24/Sep/2019

Release Status:
ReleaseRelease date
1 1 (this release) 01/May/2012

Training packages that include this unit

CodeTitleSort Table listing Training packages that include this unit by the Title columnRelease
UET12 - Transmission, Distribution and Rail Sector Training PackageTransmission, Distribution and Rail Sector Training Package 1.0-2.1 
UEP - Electricity Supply Industry - Generation Sector Training PackageElectricity Supply Industry - Generation Sector Training Package 1.0 


SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 031311 Powerline Installation And Maintenance  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 031311 Powerline Installation And Maintenance  03/Sep/2012 
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Modification History

Not applicable.

Unit Descriptor

Unit Descriptor 

1) Scope: 

1.1) Descriptor 

This Competency Standard Unit covers the maintenance and repair of the overhead traction electrical equipment and components as well as associated hardware including ancillary equipment. It includes the repair or replacement of “like for like” electrical components/equipment and associated hardware and the undertaking of safe working practices on or about the running line/track. It also encompasses the isolation of systems and circuits for safe working according to work plans and the correct positioning of road signs, barriers and or warning devices and the procedure of issuing/accepting electrical permits. It also includes the visual inspection and necessary checks to confirm that equipment; components and associated hardware are in a safe condition to test and/or return to service, the re-commissioning tests of the electrical equipment, components and associated hardware and the updating of system data/maintenance records.

Application of the Unit

Application of the Unit 


This Competency Standard Unit is intended to augment formally acquired competencies. It is suitable for employment-based programs under an approved contract of training.

Licensing/Regulatory Information

License to practice 


The skills and knowledge described in this unit may require a licence/registration to practice in the work place subject to regulations for undertaking of electrical work. Practice in workplace and during training is also subject to regulations directly related to Occupational Health and Safety, electricity/telecommunications/gas/water industry safety and compliance, industrial relations, environmental protection, anti discrimination and training. Commonwealth, State/Territory or Local Government legislation and regulations may exist that limits the age of operating certain equipment.


Prerequisite Unit(s) 




Granting of competency in this unit shall be made only after competency in the following unit(s) has/have been confirmed.

Where pre-requisite pathways have been identified. All competencies in the Common Unit Group must be have been completed.

Common Unit Group

Unit Code

Unit Title


Apply Occupational Health and Safety regulations, codes and practices in the workplace


Fabricate, assemble and dismantle utilities industry components


Solve problems in d.c. Circuits


Fix and secure electrotechnology equipment


Use drawings, diagrams, schedules, standards, codes and specifications


Solve problems in electromagnetic devices and related circuits


Solve problems in low voltage a.c. Circuits


Apply sustainable energy and environmental procedures


Operate plant and equipment near live electrical conductors and apparatus


Working safely near live electrical apparatus


Install and maintain poles, structures and associated hardware


Install and maintain poles, structures, overhead conductors and cables


Install overhead traction components and equipment

Literacy and numeracy skills 


Participants are best equipped to achieve this unit if they have reading, writing and numeracy skills indicated by the following scales. Description of each scale is given in Volume 2, Part 3 “Literacy and Numeracy”







Employability Skills Information

Employability Skills 


The required outcomes described in this unit of competency contain applicable facets of Employability Skills. The Employability Skills Summary of the qualification in which this unit of competency is packaged will assist in identifying Employability Skill requirements.

Elements and Performance Criteria Pre-Content

6)  Elements describe the essential outcomes of a competency standard unit

Performance Criteria describe the required performance needed to demonstrate achievement of the element. Assessment of performance is to be consistent with the Evidence Guide.

Elements and Performance Criteria




Prepare to the maintenance of overhead traction equipment/components


Works schedule(s), including drawings, plans, requirements, established procedures, and material lists, are received, analysed and confirmed, if necessary, by site inspection.


Relevant requirements and established procedures for the work are communicated to all personnel and identified for all work sites.


OHS policies and procedures related to requirements and established procedures for the maintenance of overhead traction equipment/components are obtained and confirmed for the purposes of the work to be performed and communicated.


Work is prioritised and sequenced following consultation with others for completion within acceptable timeframes and in accordance with established procedures.


Hazards are identified; OHS risks assessed and control measures are prioritised, implemented and monitored including emergency exits kept clear according to established procedures.


Relevant work permits are obtained to access and perform work according to requirements and/or established procedures.


Resources including personnel, equipment, tools and personal protective equipment required for the job are obtained and confirmed in working order.


Relevant personnel at worksite are confirmed current in CPR, First Aid, and other rescue procedures according to requirements.


Liaison and communication issues with other authorised personnel, authorities, clients and land owners are resolved to carry out work where necessary.


Site is prepared according to the work schedule and to minimise risk and damage to property, commerce, and individuals in accordance with established procedures.


Personnel participating in the work, including plant operators and contractors, are fully briefed and respective responsibilities confirmed where applicable in accordance with established procedures.


Rail/road signs, barriers and warning devices are positioned in accordance with requirements.


Environmental constraints applicable to work are identified and control measures are applied.


Carry out the maintenance of overhead traction equipment/components


OHS and sustainable energy principles and practices to reduce the incidents of accidents and minimise waste are monitored and followed in accordance with requirements and/or established procedures.


Lifting, climbing, working aloft, and use of power tools/equipment, techniques and practices are safely followed and, currency according to requirements confirmed.


Systems and circuits are isolated as required, proved safe to work on in accordance with the requirements/permits and established procedures.


Essential knowledge and associated skills are applied in the safe maintenance of overhead traction equipment/components to ensure completion in an agreed timeframe and, to quality standards with a minimum of waste according to requirements.


Electrical component/equipment and associated hardware is ascertained as operating within normal operating parameters and in accordance with requirements and established procedures.


Maintenance, including repair and/or replacement of overhead traction equipment/components is carried out, in accordance with the work schedule and requirements/established procedures.


Hazard warnings and safety signs are recognised and hazards and assessed OHS risks are reported to the immediate authorised persons for directions according to established procedures.


Unplanned events during the maintenance of overhead traction equipment/components are undertaken within the scope of established procedures.


Known solutions to a variety of problems are applied using acquired essential knowledge and associated skills.


Ongoing checks/visual inspection of work quality are undertaken in accordance with instructions and established procedures.


Complete the maintenance of overhead traction equipment/components


Work undertaken is checked and or tested against works schedule for conformance with requirements and anomalies reported in accordance with established procedures.


Work site is rehabilitated, cleaned up and made safe in accordance with established procedures.


Tools, equipment and any surplus resources and materials are, where appropriate, cleaned, checked and returned to storage in accordance with established procedures.


Relevant work permit(s) are signed off after final inspections and the system is energised, tested and returned to service in accordance with requirements.


Works completion records, reports, as installed /modified drawing and/or documentation and information are finalised and processed and appropriate personnel notified.

Required Skills and Knowledge


8)  Essential Knowledge and Associated Skills (EKAS): This describes the essential skills and knowledge and their level, required for this unit.

Evidence shall show that knowledge of maintaining overhead traction equipment and components has been acquired.

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies.

KS01-TRT28A Maintain overhead traction equipment and components

Evidence shall show an understanding of the maintenance of overhead traction equipment and components indicated by the following aspects:

T1 Overhead traction equipment encompassing:

  • Types
  • Purpose
  • (Note: Examples include switches/isolators, fuse switches, links, section insulators, and fuses)

T2 Types of overhead components encompassing:

  • Types
  • Purpose
  • (Note: Examples include cantilever hardware, droppers, bay components, portal hardware, head span hardware, section insulators, neutral sections, registration fittings, steady span, tension regulators and cross spans)

T3 Types of conductors used for overheads wiring such as hard-drawn, CAD, and tin-bearing copper, aluminium, steel, and other alloyed conductors

T4 Types of traction wire support structures that may consist of portals, cantilevers, drop pieces, head spans, cross spans and pull-offs

T5 Ancillary equipment

  • Types
  • Purpose
  • (Note: Examples include surge arresters, booster and auxiliary transformers)

T6 Methods for replacing conductors that may consist the use of:

  • Preformed fittings
  • Compression fittings
  • Wedged fittings
  • Bolted splices
  • Lugs
  • Bolted clamps

T7 Methods for replacing components such as:

  • Feeders
  • Droppers
  • Dissimilar conductors
  • Jumpers
  • Surge arresters

T8 Use of plant and equipment for maintenance work, such as:

  • Elevating work platforms
  • Ladders
  • Works trains
  • Rail-mounted overhead wiring equipment/vehicles
  • Road/rail height access machinery/vehicles
  • Voltage detectors
  • Micrometer/gauges
  • Tension wrenches
  • Dynamometers
  • Other specialised tools

T9 Maintenance of overhead traction equipment and components encompassing:

  • Types of equipment and components
  • Types and function of tools and equipment
  • Maintenance/repair procedures
  • Inspection and recording procedures

T10 Diagnose and correct simple faults in specific overhead traction equipment and component encompassing:

  • Types and causes
  • Determination of appropriate corrective actions

T11 Repair and replace procedures for specific overhead traction equipment and components

Evidence Guide


9)  This provides essential advice for assessment of the competency standard unit and must be read in conjunction with the Performance Criteria and the range statement of the competency standard unit and the Training Package Assessment Guidelines.

The Evidence Guide forms an integral part of this Competency Standard Unit and shall be used in conjunction with all component parts of this unit and, performed in accordance with the Assessment Guidelines of this Training Package.

Overview of Assessment 


Longitudinal competency development approaches to assessment, such as Profiling, require data to be reliably gathered in a form that can be consistently interpreted over time. This approach is best utilised in Apprenticeship programs and reduces assessment intervention. It is the Industry’s preferred model for apprenticeships. However, where summative (or final) assessment is used it is to include the application of the competency in the normal work environment or, at a minimum, the application of the competency in a realistically simulated work environment. It is recognised that, in some circumstances, assessment in part or full can occur outside the workplace. However, it must be in accord with Industry and, Regulatory policy in this regard.

Methods chosen for a particular assessment will be influenced by various factors. These include the extent of the assessment, the most effective locations for the assessment activities to take place, access to physical resources, additional safety measures that may be required and the critical nature of the competencies being assessed.

The critical safety nature of working with electricity, electrical equipment, gas or any other hazardous substance/material carries risk in deeming a person competent. Hence, sources of evidence need to be ‘rich’ in nature so as to minimise error in judgment.

Activities associated with normal every day work have a bearing on the decision as to how much and how detailed the data gathered will contribute to its ‘richness’. Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practiced. These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments. Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package.

Critical aspects of evidence required to demonstrate competency in this unit 


Before the critical aspects of evidence are considered all prerequisites shall be met.

Evidence for competence in this unit shall be considered holistically. Each element and associated Performance Criteria shall be demonstrated on at least two occasions in accordance with the “Assessment Guidelines – UET12”. Evidence shall also comprise:

  • A representative body of Performance Criteria demonstrated within the timeframes typically expected of the discipline, work function and industrial environment. In particular this shall incorporate evidence that shows a candidate is able to:
  • Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the Performance Criteria and range; and
  • Apply sustainable energy principles and practices as specified in the Performance Criteria and range; and
  • Demonstrate an understanding of the essential knowledge and associated skills as described in this unit to such an extent that the learner’s performance outcome is reported in accordance with the preferred approach; namely a percentile graded result, where required by the regulated environment; and
  • Demonstrate an appropriate level of employability skills; and
  • Conduct work observing the relevant Anti Discrimination legislation, regulations, policies and workplace procedures; and
  • Demonstrated performance across a representative range of contexts from the prescribed items below:

Range of tools/equipment/materials/procedures/workplaces/other variables 

Group No 

The minimum number of items on which skill is to be demonstrated 

Item List 


At least two of the following:

Fuse switches

Dropout fuses

Section insulators




Surge diverters



At least five of the following:

Cantilever hardware

Head span

Neutral sections

Pull offs

Registration fittings

Steady span

Tension regulators

Cross spans

Tramway support network



At least two of the following:

Preformed fittings

Compression fittings

Wedge fittings

Bolted splices


At least three of the following:


Dissimilar conductors


Bolted clamp

Drapes/potential jumper



At least two of the following:

Voltage detectors


Tension wrench


Specialised tools


At least one occasion

Dealing with an unplanned event by drawing on essential knowledge and associated skills to provide appropriate solutions incorporated in the holistic assessment with the above listed items.

Context of and specific resources for assessment 


This unit should be assessed as it relates to normal work practice using procedures, information and resources typical of a workplace. This should include:

  • OHS policy and work procedures and instructions.
  • Suitable work environment, facilities, equipment and materials to undertake actual maintenance of overhead traction equipment and components.

In addition to the resources listed above, in context of and specific resources for assessment, evidence should show demonstrated competency working maintaining overhead traction equipment and components, with different structural/construction types and method and in a variety of environments.

Method of assessment 


This Competency Standard Unit shall be assessed by methods given in Volume 1, Part 3 “Assessment Guidelines”.


Competent performance with inherent safe working practices is expected in the Transmission, Distribution and Rail Traction Industry. This requires that the specified essential knowledge and associated skills are assessed in a structured environment which is primarily intended for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and associated skills described in this unit.

Concurrent assessment and relationship with other units 


For optimisation of training and assessment effort, competence in this unit may be assessed concurrently with the following units:


Maintain traction overhead wiring systems


Install overhead traction components and equipment

Range Statement


10)  This relates to the competency standard unit as a whole providing the range of contexts and conditions to which the Performance Criteria apply. It allows for different work environments and situations that will affect performance.

This Competency Standard Unit shall be demonstrated in relation to the maintenance, visual inspection and pre-commissioning tests of the overhead traction electrical equipment and components as well as associated hardware including ancillary equipment.

Maintenance may include the carrying out of diagnostics and tests on conductors, equipment, systems as well as the removal, repair and replacement of cables, conductors, and associated hardware and returning such to operational service.

Types of traction wire support structures may consist of portals, pull-off, drop-pieces, head spans, cross spans and tramway support networks.

Types of traction components may include droppers, bay components, cantilever hardware, portal hardware, steady spans hardware, steady spans, insulators, pull-off arms, tension regulators, section insulators, neutral sections, tramway frogs, pendulums, crossing pans, ears/hangers, booster and auxiliary transformers, air break switches, in-span feeders, isolation switches, knuckles (insulated and non-insulated) and cross arms..

Traction system components may consist of metalwork, wires, hardware, fittings and insulators.

Types of conductor may include HD, CAD, and tin bearing copper, aluminium, steel, aluminium conductor steel reinforced and copper cover steel.

Types of wiring arrangements include single wire/tram systems, simple and compound catenary systems.

Plant may include ladders, elevating work platforms, winches, specialist tension string equipment, cable trailers, work trains, rail mounted overhead wiring equipment/vehicles and road rail mounted overhead wiring equipment/vehicles.

Ancillary equipment may include, transformers, switches, and surge diverters.

The following constants and variables included in the element/Performance Criteria in this unit are fully described in the Definitions Section 1 of this volume and form an integral part of the Range Statement of this unit:

  • Appropriate and relevant persons (see Personnel)
  • Appropriate authorities
  • Appropriate work platform
  • Assessing risk
  • Assessment
  • Authorisation
  • Confined space
  • Diagnostic, testing and restoration
  • Documenting detailed work events, record keeping and or storage of information
  • Drawings and specifications
  • Emergency
  • Environmental and sustainable energy procedures
  • Environmental legislation
  • Environmental management documentation
  • Established procedures
  • Fall prevention
  • Hazards
  • Identifying hazards
  • Inspect
  • Legislation
  • MSDS
  • Notification
  • OHS practices
  • OHS issues
  • Permits and/or permits to work
  • Personnel
  • Quality assurance systems
  • Requirements
  • Testing procedures
  • Work clearance systems

Unit Sector(s)

Not applicable.

Competency Field

Competency Field 


Rail Traction Units