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Elements and Performance Criteria

1. Prepare to install/maintain vital relay interlocking system
   • Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are identified, obtained and clarified
2. Hazards are identified, WHS/OHS risks assessed, and control measures and workplace procedures are implemented in preparation for work
3. Scope of installation/maintenance work is determined from job specifications, drawings and regulatory requirements
4. Appropriate rail safe working person/s is consulted to ensure work is coordinated effectively with others to minimise traffic disruptions
5. Materials needed for installation/maintenance work are obtained in accordance with workplace procedures and checked against job specifications
6. Tools, equipment and testing devices needed for installation/maintenance work are obtained in accordance with workplace procedures and checked for correct operation and safety
7. Install/maintain vital relay interlocking system
   • WHS/OHS risk control measures and workplace procedures for carrying out the work are followed
8. Visual inspection of installation wiring and equipment is carried out to identify damaged or faulty equipment
9. Damaged or faulty component/s identified during inspection is replaced in accordance with technical instructions, manufacturer specifications and workplace maintenance procedures
10. Installation/maintenance is performed efficiently, without waste of materials or damage to apparatus, the surrounding environment or services using sustainable energy practices
11. Systems are investigated using appropriate fault-finding and diagnostic techniques to identify faults
12. Fault circuit indicators and maintenance records are used to assist in the identification of electrical faults
13. Repairs, replacement and/or adjustment of equipment/systems are carried out using appropriate tools and test equipment to ensure equipment/systems function to relevant technical and operational standards
14. Faulty, worn, damaged or insecure components are repaired/replaced or secured whilst ensuring system safety integrity is maintained in accordance with technical and/or manufacturer specifications
15. Methods for dealing with unplanned situations are determined on the basis of safety and specified work outcomes
16. Vital relay interlocking system is inspected and tested in accordance with workplace test procedures and relevant equipment is used to ensure it operates within specified technical parameters
17. Complete vital relay interlocking system installation/maintenance
    • WHS/OHS work completion risk control measures and workplace procedures are followed
18. Reusable, faulty and worn components are tagged and despatched for repair in accordance with workplace procedures
19. Maintenance work activities are recorded in accordance with workplace procedures and organisation requirements
20. Documentation, including component faults test results, authorisations and permits, is completed to provide an accurate database and facilitate follow-up action and relevant reports produced

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria on at least two separate occasions and include:

interpreting plans and specifications correctly using appropriate fault-finding techniques installing/maintaining vital relay interlocking systems to operational requirements organising work to minimise rail traffic disruptions using tools correctly following relevant codes of practice, work health and safety (WHS)/occupational health and safety (OHS) and environmental protection procedures and requirements completing relevant technical reports, records and documentation dealing with unplanned events applying rail safe working practices and relevant industry standards, codes and rail safety regulations applying relevant WHS/OHS requirements, including: implementing workplace procedures and practices using risk control measures applying sustainable energy principles and practices completing installation/maintenance of vital relay interlocking systems.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

vital relay interlocking systems installation/maintenance, including: rail signalling, interlocking systems - electrical equipment and their components encompassing: power supplies relays - timers relays - latching/delatching relays - line relays - biased signaller controls/indications geographic modules mechanical interface operating principles and parameters encompassing: normal mode operation route selection circuits signal approach circuits and timers point release circuits and timers panel indications and circuits wrong-side protection mode alarm mode emergency operation correct operation in accordance with control and locking tables servicing procedures encompassing: maintenance documentation coordination/planning sequence operational test procedures scheduled/preventative maintenance unscheduled/corrective maintenance certifying interlocking equipment (commission and decommission) certifying procedures applicable for compliance with rail operator and/or enterprise standards relevant job safety assessments or risk mitigation processes relevant manufacturer specifications relevant WHS/OHS legislated requirements relevant workplace policies and procedures safe working practices and relevant industry standards, codes and regulations.

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