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 E52 of 52 19 Traction Negative Return Jumpers 50 mm 50 mm <strong>General</strong> <strong>Information</strong> on Track Circuits These are supplied by the Electric Traction Engineer and are connected to the aluminium busbar by Signal Engineering staff in accordance with GK/RC0754 Part D. A marking jig (see Figure E55) should be utilised for marking out the busbar for drilling. 16.5 mm Withdrawn Document Uncontrolled When Printed NOTES 63.5mm 191.0mm To Be Suitably Drilled and Riveted E 52 R A I L T R A C K 63.5mm 20mm 5 0 150 mm 4 Holes at 17.5 mm Dia. 150 mm 1. Material is aluminium plate 150 x 6 (Off cut from impedance bond busbar.) 2. Remove all burrs and sharp edges. 3. Jig must be located in the centre of the bed. 4. This jig is for marking out only. Figure E55 A label with the legend ”TRACTION VOLTAGE DO NOT REMOVE THIS LEAD” (see Figure E54) should be attached to negative return jumpers at substations, TP Huts and TIR sites. Such leads may be disconnected only under an absolute traction isolation and in accordance with GK/RC0754 Part G.
<strong>General</strong> <strong>Information</strong> on Track Circuits 1 Introduction 2 Multi–meters 3 The Universal Shunt Box Withdrawn Document Uncontrolled When Printed Railway Group Approved Code of Practice GK/RC0752 Issue Two Date December 1998 Page F1 of 5 Part F Instrumentation Description and Use This section gives details of the tools and instrumentation available for general use on track circuits. Instruments designed to be used with particular designs of track circuit can be found in the relevant Code of Practice within the track Circuit Handbook. 2.1 Types In general, both analogue and digital multi–meters can be used when testing track circuits. Analogue Meters: Description Catalogue No. Lineman’s AVO HD6 : 86/11001 (No longer available) Digital Meters: Description Catalogue No. Megger Instruments M2006 : 40/56003 Carrying Case : 40/56016 Test Lead Kit : 40/17758 Digital meters will usually require a loading resistor of 150kΩ (Catalogue No. 86/11041) fitted to the meter to ensure that a load current is drawn when used on voltage tests. 3.1 Description Various designs of track circuit shunt box have been produced over the years, some early designs being incapable of coping with the power dissipation requirements when shunting higher powered track circuits. The only design described in this handbook is the current standard design, which is suitable for use on all track circuit designs (Figure F1). Description Catalogue No. Universal Track Circuit Shunt Box : 40/5450) Figure F1 R A I L T R A C K F1
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General Information on Track Circuits - RGS Online

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