General Information on Track Circuits - RGS Online
General Information on Track Circuits - RGS Online
General Information on Track Circuits - RGS Online
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<str<strong>on</strong>g>General</str<strong>on</strong>g> <str<strong>on</strong>g>Informati<strong>on</strong></str<strong>on</strong>g> <strong>on</strong> <strong>Track</strong> <strong>Circuits</strong><br />
8 Rail C<strong>on</strong>necti<strong>on</strong>s<br />
Withdrawn Document<br />
Unc<strong>on</strong>trolled When Printed<br />
Railway Group Approved Code of Practice<br />
GK/RC0752<br />
Issue Two<br />
Date December 1998<br />
Page E7 of 52<br />
The following table of Permanent Way Engineer’s rail markings is included to<br />
assist staff in the identificati<strong>on</strong> of rail types. The brand marks appear as raised<br />
characters <strong>on</strong> the rail web; c<strong>on</strong>firmati<strong>on</strong> is also provided by paint marks <strong>on</strong> new<br />
rail and (in some cases) by its magnetic properties.<br />
Remarks:<br />
Figure E4<br />
Type Brand Mark Paint Marks Magnetic Remarks<br />
Normal N<strong>on</strong>e N<strong>on</strong>e Yes 1<br />
Wear resisting A A 2 blue Yes 1<br />
Wear resisting B B 3 blue Yes 1<br />
BSC 90 AA 1 blue/1 white Yes 1<br />
90kg chrome 1CR 1 red Yes 1<br />
100kg chrome 1CR 2 red Yes 1<br />
AMS HC Manganese 1 green No 2<br />
AMS LC Manganese W 1 green No 2<br />
MHT - - Yes 1&3<br />
1: Can be drilled using c<strong>on</strong>venti<strong>on</strong>al methods.<br />
2: Can be drilled <strong>on</strong>ly with special tools/techniques.<br />
3: Identificati<strong>on</strong> not yet agreed.<br />
8.1 Introducti<strong>on</strong><br />
The various methods of making electrical c<strong>on</strong>necti<strong>on</strong>s to the rail are explained<br />
below:<br />
8.2 Taper Pins<br />
The taper pin requires a 7.2mm hole, 57±2mm above the base of the rail, to be<br />
drilled through the rail. The taper pin c<strong>on</strong>sists of a threaded secti<strong>on</strong> to which the<br />
various c<strong>on</strong>nectors are attached, and a n<strong>on</strong>–threaded end which is tapered to<br />
ensure that the pin is firmly fixed to the rail.<br />
Fit the taper pins into the holes and hit the n<strong>on</strong>–threaded ends with a hammer to<br />
ensure that the pins and the rail are in electrical c<strong>on</strong>tact.<br />
Catalogue numbers are as follows:<br />
Descripti<strong>on</strong> Catalogue No.<br />
<strong>Track</strong> circuit maintenance kit<br />
Comprising:<br />
: 88/10037<br />
Pin, taper, BRS-SM 411, 55mm l<strong>on</strong>g (10) : 86/44013<br />
Nut, self locking, stainless steel,M6 (10) : 3/179995<br />
Washer, stainless steel, M6 (20) : 3/190825<br />
Nut, stainless steel, M6 (10) : 3/175013<br />
R A I L T R A C K E 7
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