Deleted
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Post by Deleted on Apr 7, 2005 17:19:39 GMT
How exactly does one immunise a signalling system?
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Tom
Administrator
Signalfel?
Posts: 4,196 
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Post by Tom on Apr 7, 2005 20:31:48 GMT
Utilise technology which will not be falsely energised by other power supplies. For example, LTE(1978) style coded track circuits on the Met City, Filters on the H&C, Jointless track circuits on the B'loo and Central, use screened cables, etc.
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Deleted
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Post by Deleted on Apr 8, 2005 15:50:22 GMT
also east of cambell road on the district as the OLE uses a 50hz frequency and the signalling AC main uses 33 1/3 hz theres track filters on every track from cambell road - upminster. also on the olympia branch there is JTC signalling screened cables and double blockjoints keep it isolated from the rest of the district at west ken
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Post by chris on Apr 10, 2005 15:07:26 GMT
There's a bloody joke there somewhere but I'm damned if I can think of one! Why break the habit of a lifetime?  |
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