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Delta Sama Jaya Sdn Bhd
23G & 23M, DSSB Building,
Jalan Perdana 6/8,
Pandan Perdana,
55300 Kuala Lumpur,

+603 9286 6328
+603 9281 3778
+603 9282 4007
+603-9287 0705

Short Circuiting Strap

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Short Circuiting Strap Overhead Rail Earthing System Railway Safety Earthing Equipment



Short Circuiting Strap

P&B Weir Electrical Ltd’s Rail Short Circuiting Straps are used to short the positive and the negative circuit of a D.C. feeder section. In the event of an emergency or inadvertent re-energisation of the supply the devices cause the supply protection to operate.

Each short circuiting strap consists of three J117 rail clamps fitted with suitably rated interconnecting flexible copper leads. The clamps are constructed from steel and are zinc galvanised to provide protection from site atmospheres. The body has an insulating shield fitted to prevent welding to the rail should the clamp be subjected to a fault current.

Secure location upon the foot of both ‘flat-bottomed’ and ‘bull-head’ rail types is provided by a hardened tip above the rail and a grooved block beneath the rail. The hardened tip fits into the operating screw with an insulating bush to ensure that the correct contact path is made.

The grooved block fits directly on top of the copper busbar ensuring a very low contact resistance. The busbar sits upon a stack of disc spring washers, which should be fully compressed when the clamp is applied. These washers apply a pre-loaded pressure upon the rail in order to maintain firm contact.

Customer Benefits:

  • Rugged construction and good corrosion resistance
  • Suitable for fitting to all common types of running and conductor rails
  • Suitable for corroded rail.
  • Reinforced PVC carrying bag supplied
  • PADS Ref. 0091/012196
  • Part Number:                      EFT-16732/1

Further technical details:

  • Rail Short Circuiting Straps are to be used in accordance with the requirements of Railway Group Standard GO/RT/3091 and Railtrack Working Instructions for the Drayton Park­ Moorgate (BR29987/9) and Working Instructions for DC Electrified Lines in Liverpool area (BR29740).

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