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Post by londonstuff on Jul 1, 2008 21:51:43 GMT
If a signal repeater fails, e.g. just a simple bulb blown, etc. does that count as a signal failure, or can these be passed if, for example, there's no aspect?
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Post by c5 on Jul 1, 2008 21:56:55 GMT
If a signal repeater fails, e.g. just a simple bulb blown, etc. does that count as a signal failure, or can these be passed if, for example, there's no aspect? If its a repeater that is okay to pass as it's not a stop signal. If it's a fog repeater or no green aspect on a repeater then a white board will be made up at the previous station to inform train operators that it has been reported. If it has no yellow aspect then a hand signalman may well be positioned at the station before to pass the message directly to train operators. If a stop signal has no aspect, then it must be treated as being at danger. |
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Post by railtechnician on Jul 3, 2008 10:38:50 GMT
A green or yellow light out at a repeater when it should be illuminated is a signal failure for reporting purposes and is usually dealt with immediately by the call lineman.
However, platform repeaters, which are also reported as signal failures, are of a lower priority and will often be left to be dealt with by night maintenance staff. Platform repeaters are not as essential as trackside repeaters and of course there are H&S issues these days with regard to erecting ladders on the platform in traffic hours etc.
Of course the loss of aspect in a trackside repeater is not always due to a blown bulb, sometimes is is due to a burnt out relay contact and it is then a question of getting a replacement relay delivered to site. So again a trackside repeater failure may end up as night work too especially if there are failures of a higher priority i.e. point, trainstop and signal to be dealt with.
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