Issue with my train yesterday at LB

[uzairjubilee]

Yesterday I travelled from Canary Wharf to Westminster. I was in the first carriage. As we arrived into the platform at London Bridge, the new 'stop and start' thing the motors now do was happening, but more ecstatic than normal. A few seconds later it then seemed that the motors cut out - as there was no sound at all coming from the train. The train appeared to be coasting for a few seconds, and them I'm pretty sure the emergency brake was applied, however not completely sure. The train then stopped 2/3 along the platform. For a minute we were stuck there, and eventually continued to the end of the platform very slowly.

What happened?

[alfie]

Pr'haps the driver saw some people being silly opening the PEDS and hit the emergency brake? Otherwise, I'll leave it to the technical people.

[jardine01]

Maybe the fuse went or something and cut the motors out like a MCB trip? This new stop start of the motors is not good.

[jardine01]

I don't know how it is possible to open the peds. I am sure they will be locked and can only open when the driver opens the doors?

[alfie]

There's an emergency release on the side of the train at least, dunno about the other side.

Which adds to the Jubbly misery, last time I rode at every station the doors opened a good 1-2 seconds before the PEDS, dangerous to someone like me who subconsciously steps right out the train as soon as the doors are an inch open..

[Chris M]

There is a way for station staff to open the PEDS, the controls are located at/near the headwall I think. Whether they need a key or something to operate I don't know. It's been quite a while since I was near the headwall at a PED station.

I know I've had to operate the train side release on a couple of occasions, but I don't know if it automatically opens the other doors as well or just the local one. On the first occasion I was in such a rush I didn't think to look and on the second it was only the door I was at which didn't open.

[rsdworker]

Jan 14, 2012 20:19:36 GMT Chris M said:

There is a way for station staff to open the PEDS, the controls are located at/near the headwall I think. Whether they need a key or something to operate I don't know. It's been quite a while since I was near the headwall at a PED station.

I know I've had to operate the train side release on a couple of occasions, but I don't know if it automatically opens the other doors as well or just the local one. On the first occasion I was in such a rush I didn't think to look and on the second it was only the door I was at which didn't open.

once time i saw staff standing at faulty PED - each PED has controls - usually a keyhole on one of frames which overrides and allows opened by manual

[jardine01]

whats wrong with the peds lately? At Westminister they failed to open the trains doors opened but the peds did not it took several attempts to get them open.

[Tubeboy]

Referring to the OP, its possible the tracks under the train closed, as to why, who knows? This would cause the train to be emergency braked. I cant find anything at work relating to this "incident".

As to the PEDS. The green switch on the train side of the PEDS is the Emergency Release Mechanism [ERM] ERMs in the main are operated by people when the train doors open and the PEDS dont. Usually the delay is only a few seconds at worst, but some people get impatient/panicky and operate the ERM. Operating an ERM sends a safety and security alarm to the Station Control Room.

Station Staff can open and close the PEDS [Whole suite] via the PCC [Platform Control Console] which is operated via a RKL 220 key[the standard key that opens up/closes a train down]

Each doorway on the left hand side has a door isolating switch where an individual door can be cut out of the suite. This is usually done when that individual door fails to open or close. Again it is operated with an RKL 220 key. When the door is isolated, the indicator light above the doorway flashes. Again an alarm is sent to the Control Room.

[version3point1]

Sometimes a train can go into coast, but then if the VOBCs (the computers on either end of the train that pick up the signals from the track) lose information, the train will automatically apply the emergency brakes and the train cannot move until the VOBCs are working again. This used to happen a lot at Stratford, as the trains would sometimes lose motors going over the multitude of rail gaps there. The automatic application of the emergency brakes is a failsafe.

And just an aside:

Jan 14, 2012 17:02:07 GMT @jardine01 said:

I don't know how it is possible to open the peds. I am sure they will be locked and can only open when the driver opens the doors?

There is a locking mechanism inside the frame of a PED. The use of a J door key can unlock this so the door can be manually opened by staff on the platform when the need arises. It still takes some force to get the PEDs to open, but then once you get them open part way the doors will then release to open freely.

On the rare* occasion, forcible opening of of the PEDs, whereby a J door hasn't being used to unlock the PED, can damage the locking mechanism. If the door is forced open whilst the lock is in the closed position, the door will freely open, but the doors closed visual (the blue light at the ends of the platforms that illuminates to say the PED suit is closed) can sometimes remain illuminated and the platform indicator light (the orange light that illuminates when a PED is open) will not – essentially – you can have a door wide open with no train on the platform. It's quite rare – we had this problem at North Greenwich on the eastbound platform, whereby a driver was a accused by a passenger that he had departed the platform with one PED still wide open.

*The technician attending said that in all the time he has dealt with PED faults since their installation, this was the third one he'd ever dealt with.