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Wrong side failure filament failure?

You are here: Home > Forum > General > General questions, comments, and issues > Wrong side failure filament failure?

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Wrong side failure filament failure? 09/01/2015 at 17:38 #67644
Jersey_Mike
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250 posts
" said:

In reality, once a Signalman knows a lamp is out, he will be careful to ensure that he does not allow a train to see any signals change aspect downwards, or if that is unavoidable (for instance in auto sections with no replacement switches) then he will stop all trains at a convenient point and caution.
Sounds like a hassle. I'm glad bulb out protection is not typically employed in North America.

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Wrong side failure filament failure? 09/01/2015 at 21:09 #67663
Muzer
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718 posts
It's usually not that hard (at least in SimSig ;)), you just have to turn off the auto route setting on the next controlled signal, and only ever set the route when you're sure there won't be any adverse changes of aspect.


I think last time I asked here, the consensus was that IRL actual signal light failures (rather than failures of the proving equipment itself) is rare because signals usually have spare filaments, etc. Maybe I'm misremembering though.

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Wrong side failure filament failure? 09/01/2015 at 21:11 #67665
Stephen Fulcher
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2026 posts
They don't happen that often, but it is certainly not uncommon.
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Wrong side failure filament failure? 10/01/2015 at 01:12 #67673
DaveBarraza
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88 posts
" said:

Sounds like a hassle. I'm glad bulb out protection is not typically employed in North America. :P
Most of the (non-transit) North American circuits I've looked at recently have light-out protection of some kind.

e.g. loosing the marker on a B&O clear downgrades it to Slow clear - so the signal in approach gets downgraded to approach slow...

LIRR capital signal contracts include a table of light-out scenarios with specified downgrades in approach to them.

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Wrong side failure filament failure? 10/01/2015 at 02:21 #67674
GeoffM
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6287 posts
" said:
" said:

Sounds like a hassle. I'm glad bulb out protection is not typically employed in North America. :P
Most of the (non-transit) North American circuits I've looked at recently have light-out protection of some kind.

e.g. loosing the marker on a B&O clear downgrades it to Slow clear - so the signal in approach gets downgraded to approach slow...

LIRR capital signal contracts include a table of light-out scenarios with specified downgrades in approach to them.
Is it even possible with approach-lit signals, as many seem to be?

SimSig Boss
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Wrong side failure filament failure? 14/01/2015 at 01:20 #67796
vontrapp
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210 posts
When the floods stranded a HST, down south, the driver had no communication whatsoever. The colour-light signal was showing nothing, the SPT was not working, the driver's phone had no signal. The driver could not communicate with any part of NR! What should the driver do? I know the answer, as it's simple.
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