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Railway Group Approved Code of Practice GK/RC0752 Issue Two Date December 1998 Page E36 of 52 Withdrawn Document Uncontrolled When Printed Track Leads Figure E34 Track Leads Figure E35 <strong>General</strong> <strong>Information</strong> on Track Circuits Timber Timber 200 585 CRS E 36 R A I L T R A C K `M' 76 Timber Timber M2. M5. 700 CRS 200 16.5 Concrete Sleeper Fixing Arrangements The fixing of impedance bonds to concrete sleepers/bearers requires the sleeper/bearer to be drilled off centre. This problem is overcome by using adjustable fixing straps (see Figure E36). Signal Engineering staff are permitted to drill holes in concrete sleepers, however, these may only be drilled on the centre line of the sleeper. If concrete bearers are required to be drilled, prior agreement should be obtained from the Permanent Way Engineer. 76
<strong>General</strong> <strong>Information</strong> on Track Circuits 17 Aluminium Busbars Withdrawn Document Uncontrolled When Printed 400 Figure E36 Sleeper Drilled 18 on Centre Line X 95 Deep (Min) Metal Anchor HSL M12/25 Hilti Code 6692 2 Off M20 X 50 Long Hex. Hd. Screw Sleeper Not To Be Drilled Typical Arrangement if Impedance Bond Fixing to Concrete Sleepers Railway Group Approved Code of Practice GK/RC0752 Issue Two Date December 1998 Page E37 of 52 3 X 45 degree Chamfer 40 65 140 3 Fillet Weld 7.5 Radius All Dimensions in mm 16.6 Safety Labelling Warning labels as described in Section 14 should be fitted to the outside of the auxiliary coil terminal box cover. 17.1 Introduction The various layouts and installation arrangements of aluminium busbars are shown on the drawings as described below: Inter–track circuit connections are shown in Figure E37 and Figure E38. Details of busbar lengths and Railway Catalogue Nos. are given in Figure E39, Figure E40, Figure E41 and Figure E42. Busbar drillings for connection to the bond and rail side leads are shown in Figure E28, Figure E29 and Figure E39. Style S impedance bonds are fitted with down–set busbars. Details can be found in Figure E37, Figure E38, Figure E39 and Figure E40. Installation details of the aluminium busbars are shown in Figure E26, Figure E27, Figure E28, Figure E29 and Figure E43. Installation of the busbar to earlier types of impedance bond is shown in Figure E32, Figure E33, Figure E34 and Figure E35. R A I L T R A C K E 37 Ø 16 18 30 12 " 40 "
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