On Oct 31, 11:45*pm, Theo Markettos theom
wrote:
In uk.railway D7666 wrote:

375/377 configure themselves by current limiting. Its been posted in
here a few times before, but in simple terms each traction pack (or
motor bogie) takes 750 A but once a train reaches or exceeds 4500(?)
A, the train computers divide loads equally across all working packs
but not at 750 A. Or something like that. In this way the performance
of 4x3 (8 packs) is equalised with 3x4 (9 packs).

There was that 23 car Southeastern 37x that ran as ECS during the snow last
winter. *Obviously a special case with appropriate overrides, but I wonder
what was overridden. *Highest current would be on starting I assume, and you
can't avoid that. *Unless by a reduction in starting torque?

Theo

IIRC 2 11-12 car trains of 3or4 car units failed that morning due to
losing all shoes.

AFAIA that 23 car train was one 11or12 car train tractoring the other
12or11 car train one of which had no shoes to take any power so was
dead.

--
Nick