On 25/10/2012 20:54, PhilD wrote:
On Oct 25, 6:50 pm, Roland Perry wrote:
But surely the train shouldn't be able to set off at all, in those
circumstances?

Is it not that the train can run at a very low speed, and on exceeding
that the brakes come on?

Maybe I'm wrong. Someone with more knowhow is bound to come along in
a mo...

PhilD

--


LU trains trains will simply not take power if the passenger door
circuits are not closed, unless the driver has cut in the interlocking.
They might lurch for a second in some cases, depending on the model, but
that's because of relays cutting in and out for a sec.

(D78s and I think C69s will operate with the cab doors open, and without
the interlocking engaged, though I don't know if the same applies on
other models.)

This principle of door safety is also applicable on many other EMU class
trains, though there are exceptions.