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Westpac Geographical Interlocking - Mk IIIA - Maintenance

Bespoke & Private Courses: 

Signet Solutions Limited can reserve a course for your company exclusively, and we can design courses to meet your Company’s specifications. Please contact us to discuss your requirements.

10 Days
Derby or at your premises by arrangement
Maximum number of delegates: 


This course is intended for staff to gain a detailed knowledge of this type of circuitry with respect to maintenance & faulting.

Westpac MIIIA

Key Features

  • Underpinning knowledge of the system.
  • Detailed understanding of the processes.
  • Practical fault finding exercises.

Course Outcomes

On successful completion of this course, the delegate will be able to perform maintenance and fault finding of the system in the following areas:

  • System Construction and Wiring
  • Levels of route
  • Selection
  • Calling
  • Locking
  • Aspects
  • Releasing
  • Panel Indications
  • Bi-directional Working
  • Overlaps
  • Restricted Aspects
  • Preceding Shunt Signals
  • Flank Protection
  • Fault Finding

Assessment and Certification

Achievement of the Course Outcomes will be assessed by a practical and theory assessment to demonstrate the underpinning knowledge gained.

The delegate’s achievement of the Course Outcomes will be confirmed by a certificate which will be forwarded to the nominated client contact following the course.


It would be helpful if delegate have a good knowledge of general signalling principles and circuitry, and to be an existing maintainer.