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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Railway Group Approved Code of Practice<br />
GK/RC0752<br />
Issue Two<br />
Date December 1998<br />
Page E30 of 52<br />
16 Impedance B<strong>on</strong>d<br />
Installati<strong>on</strong><br />
Withdrawn Document<br />
Unc<strong>on</strong>trolled When Printed<br />
<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 />
15.5.7 Style M2/5<br />
Descripti<strong>on</strong> Catalogue No<br />
Coil, c<strong>on</strong>denser : 88/26065<br />
Plate, lug, steel (pairs with screws)<br />
for fitting side c<strong>on</strong>necti<strong>on</strong>s : 88/83987<br />
15.5.8 Style M6<br />
Obsolete, parts out of producti<strong>on</strong>.<br />
15.5.9 Style DD<br />
Descripti<strong>on</strong> Catalogue No<br />
Coil, auxiliary : 88/83553<br />
Gasket, main cover : 88/27047<br />
15.5.10 Style B<br />
Descripti<strong>on</strong> Catalogue No<br />
Coil auxiliary : 88/83958<br />
Terminal box : 88/25802<br />
Cover, terminal box : 88/83959<br />
15.5.11 <str<strong>on</strong>g>General</str<strong>on</strong>g> Spares<br />
Descripti<strong>on</strong> Catalogue No<br />
Sealing Compound Red Hermabte no. 5400 : 7/60180<br />
Oil, insulating (impedance b<strong>on</strong>ds) 2.5 litre : 27/13802<br />
CAUTION: Care should be taken to avoid trapping fingers when handling<br />
impedance b<strong>on</strong>ds.<br />
16.1 Type 3 Impedance B<strong>on</strong>d<br />
Type 3 impedance b<strong>on</strong>ds supplied to BR863 have blanking plates, grommets or<br />
plastic plugs in the terminal box holes, together with <strong>on</strong>e M25 gland, for 2c Type<br />
C2 2.5mm²(f) and four M20 glands, for single core Type C1 2. 5mm²(f).<br />
The impedance b<strong>on</strong>d is also supplied with resilient mountings, either fitted or<br />
supplied separately. The resilient mounting feet comprise two porti<strong>on</strong>s and, if<br />
not already fitted, should be glued together using Araldite Rapide or Araldite<br />
(Railway Catalogue No. 7/103330).<br />
The cable glands should be fitted as required and the internal lock nuts glued<br />
with Araldite. If unused holes are fitted with plastic plugs, these should be<br />
replaced with threaded blanking plates. Surplus blanking plates, grommets and<br />
glands should be retained as spares.<br />
In instances where the auxiliary coil box is pr<strong>on</strong>e to water accumulati<strong>on</strong>, a 3mm<br />
hole may be carefully drilled in the bottom of the terminal box and all swarf<br />
cleared away.<br />
The b<strong>on</strong>d is now ready for installati<strong>on</strong>.<br />
The standard installati<strong>on</strong> arrangements for Type 3 b<strong>on</strong>ds <strong>on</strong> c<strong>on</strong>crete or wooden<br />
sleepers (Howells or WBS Style WH3) are shown in Figure E26, Figure E27<br />
and Figure E28.<br />
E 30 R A I L T R A C K
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