Deleted
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Post by Deleted on Jul 22, 2008 8:19:30 GMT
On a 95TS, what would cause some of the lights in the cars to go out? I was on one this morning where lights went out occasionally, notably at Golders Green. I know on C stocks this is indicative of gaps in the power rails, but have only ever noticed this once before on a 95, so I am guessing there may have been something amiss with the train.
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Deleted
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Post by Deleted on Jul 22, 2008 10:35:20 GMT
Sounds like the auxiliary converter was dropping out as the train went over rail gaps. Possibly due to a missing shoe.
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Post by edwin on Jul 22, 2008 20:54:38 GMT
This happens on all stocks in my experience...
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Post by londonboy on Jul 23, 2008 2:18:17 GMT
I reported the same problem to the line controller this afternoon as i was going into work
It does only happen as you pass over rail gaps I noted the leading car number but i cant remember what it was
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SE13
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Post by SE13 on Jul 23, 2008 6:12:25 GMT
It certainly happens on the 73ts on The Picc.......
I always thought it was something to do with the rail gaps.
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Post by tubeprune on Jul 23, 2008 15:57:23 GMT
If a train has a motor alternator (MA) supplying the lights (pre 1992 Stocks), half will go out if the train passes over a gap longer than the span of the shoes on the car with the MA. This is because most trains have an arrangement where one MA supplies half the lights on a unit and a second does the other half.
On trains with converters (92,95 & 96) the lights shouldn't go off until the load shedding comes into effect after 20 seconds [wonders - is it 20s on all three stocks?]. This means the train normally gets over gaps without losing any lights.
Emergency lights will remain on as long as the battery lasts.
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towerman
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Post by towerman on Jul 23, 2008 18:13:21 GMT
Don't know about 92/95 stocks,but 96 stock has a lighting busline,you only need one jumper in or car on juice for all car lights to work.
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Deleted
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Post by Deleted on Jul 25, 2008 18:39:36 GMT
a few weeks ago a service terminating at gg had half the lights out in all cars for the whole journey
recently I have noticed quite a few shoes missing
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Deleted
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Post by Deleted on Jul 25, 2008 22:32:18 GMT
a few weeks ago a service terminating at gg had half the lights out in all cars for the whole journey recently I have noticed quite a few shoes missing Half car lights all the time probably mean a defective auxiliary converter, or it may just need to be tripped and reset. |
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Deleted
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Post by Deleted on Jul 29, 2008 19:10:41 GMT
I've noticed sometimes on northern line trains that have half or all the lights out the train takes a long stop in the next station whilst some form of "reset" is done on the train?
Don't really know what happens from a punter-point-of-view but the ventalation and lights go off, the air breaks release pressure and then the systems come back on again. This seems to restore the half-lights.
(Hopefully nothing like rebooting Windows after a bad crash....)
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Deleted
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Post by Deleted on Aug 1, 2008 4:18:43 GMT
It's interesting that the lights are now left on in the open-air sections.
Around 1960, the lights in northbound trains went out as the last car (where the guard was situated) came out of tunnel at East Finchley or Golders Green. Unless, of course, it was nighttime.
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Colin
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Post by Colin on Aug 1, 2008 12:35:34 GMT
And that's really the reason why lights remain on all the time now - a guard in passenger area would soon know if they'd forgotten something.....a driver shut away in his cab would be none the wiser  ;D ;D ;D ;D |
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Post by compsci on Aug 1, 2008 13:10:22 GMT
A driver on a KX bound Cambridge Express once forgot to turn on the saloon lights, so it got really dark once we reached the tunnels at Welywm. You couldn't see anything at all apart from the glow in the dark safety stickers and a few mobile phones. It really was impossible to see your hand in front of your face.
By the time we were nearing KX we had our prayer mats out hoping that we wouldn't be held in Copenhagen tunnel for any length of time.
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Post by Chris M on Aug 1, 2008 14:33:38 GMT
I was on a HST to (or possiobly from) Swansea once where the saloon lights had failed in one of the carriages. the guard advised people of this when they were boarding the train and recommended they sit elsewhere.
Some people did however choose to sit in the affected coach (B iirc) and so for the Severn and Patchway tunnels the guard stood in the centre of the car with a bardic lamp on.
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