General Information on Track Circuits - RGS Online

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Railway Group Approved Code of Practice GK/RC0752 Issue Two Date December 1998 Page D20 of 20 16 Duplicate Rail Connections 17 Communications Withdrawn Document Uncontrolled When Printed <strong>General</strong> <strong>Information</strong> on Track Circuits Duplicate connections to the rails are the preferred arrangement for all track circuits, except those which operate at audio frequencies (see the relevant sections for further information). Where duplicate connections are used the method of wiring is as shown in Part E. It is desirable that communication circuits are available between the feed/transmitter and relay/receiver sites to facilitate setting up and fault finding.The communication circuits may be run in the same multicore cables as the feed, transmitter, relay or receiver circuits. At certain SSI installations, the data cables carry communication cores which may be used for this purpose. D20 RAILTRACK
<strong>General</strong> <strong>Information</strong> on Track Circuits 1 Introduction 2 Responsibilities for Bonding Installation Withdrawn Document Uncontrolled When Printed Part E Components and Installation Railway Group Approved Code of Practice GK/RC0752 Issue Two Date December 1998 Page E1 of 52 This part explains the general components applicable to all track circuits. Components specific to a particular type of track circuit are listed in the relevant Approved Code of Practice within this handbook. Installation procedures for individual track circuit types are detailed in the relevant Approved Code of Practice within this handbook. Note: The Catalogue Numbers shown within this document are not directly controlled by Railtrack and as such, will not be maintained and kept up to date. Although every effort has been made to ensure that these were correct at the time of publication, it is therefore recommended that your supplier is contacted and a check is made with regard to the accuracy of these catalogue numbers prior to use. The Signal Engineer is responsible for: a) All fishplate bonds in non–traction return rails. b) All fishplate bonds in traction return rails of a.c. only electrified areas. c) The position of all IRJs. d) All jumper bonds between separate sections of non–traction rails. e) In a.c. electrified areas (excluding the former Southern Region), all rail to impedance bond connections and connections between impedance bonds on the same track. f) In dual and d.c. electrified areas (excluding the former Southern Region), the responsibility for impedance bond connections is subject to special arrangements between the Signal and Electric Traction Engineers. g) All track circuit rail connections. h) The insulation of all rods connected to the rails and switches (eg. detection, facing point lock, point main drive and supplementary drives). The Electric Traction Engineer is responsible for: a) All rail joint bonds in d.c. or dual a.c./d.c. traction return rails. b) All jumper bonds between separate sections of traction return rails and between the centre connection of impedance bonds in different tracks. c) On the former Southern Region, rail to impedance bond connections for traction purposes. d) All other permanent traction related bonding. The Permanent Way Engineer is responsible for: a) The insulation of all point soleplates, tiebars and stretcher bars. b) The installation of all IRJs. The requirements and responsibilities for the installation of bonding on electrified lines are laid down in GM/TT0126 and GM/TT0129. R A I L T R A C K E 1
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