scope:

The contents of this Product Specification apply to all impedance bonds. The more general requirements can be found in RT/E/S/11752. Safety issues specific to impedance bonds are included; general safety issues are contained in RT/E/S/11752 and other relevant Railtrack standards.

Specific requirements for each type of track circuit are given in the appropriate Product Specification:

RT/E/PS/11760 Westinghouse Signals FS2600 Track Circuits,

RT/E/PS/11761 TI.21 Audio Frequency Track Circuits,

RT/E/PS/11763 Reed Type RT Track Circuits,

RT/E/PS/11757 Phase Sensitive Track Circuits.

PURPOSE

This Product Specification gives details of best practice in respect of impedance bonds in order to achieve the requirements of RT/E/S/11752.