Training for the Railway Industry
Telephone: 023 8065 1388

High Voltage Impulse (HVI) Track Circuits


Delegates attending this course will develop their skills and knowledge to conduct maintenance and faulting activities on High Voltage Impulse (HVI) track circuits efficiently and effectively. Attendees should have basic electrical/electronic knowledge and ideally would have attended a Basic Signalling 1 course or equivalent. Delegates should also be familiar with the Signal maintenance Specifications (SMS).

Course Objectives

On successful completion of the course the candidate will be able to:

  • Identify the main components of a HVI track circuit;
  • Explain the principles and operation of a HVI track circuit;
  • Identify different configurations of HVI track circuits;
  • Perform routine service of HVI track circuits in accordance with the current SMS and complete the relevant documentation;
  • Fault diagnosis and rectification to a HVI track circuit using a systematic approach;
  • Use test equipment specific to HVI track circuits;
  • Carry out basic fault finding activities.

Additional Information

Personal Protective Equipment

This course is run both in the classroom and in a safe outdoor training environment. All delegates are required to bring:

  • Protective “all orange” high Visibility Clothing to Network Rail Standard
  • Safety Footwear (Boots) to Network Rail Standard
  • Safety Helmet (white/blue) to Network Rail Standard

This competency is valid for two years. A Network Rail Sentinel card will be awarded to each successful candidate.

S&T Training Limited

Railway Goods Yard
Dutton Lane
Hampshire, SO50 6AA

Tel: 023 8065 1388
Fax: 023 8072 8660



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