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Old January 25th 20, 04:33 PM posted to uk.railway,
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Default Third rail systems return path

On Sat, 25 Jan 2020 17:23:34 -0000 (UTC)
Anna Noyd-Dryver wrote:
On Sat, 25 Jan 2020 10:58:40 -0000 (UTC)
Anna Noyd-Dryver wrote:
On Fri, 24 Jan 2020 11:18:14 -0800 (PST)
d gone, the majority of the Southern was upgraded to 750 V with the only


maining 660 V sections in inner London (owing to the interfaces with


Underground at Wimbledon and Richmond (because C and D stock were 630 V

its whereas S stock is designed to operate at 750 V) and the fact that

the =

Does the 750V mean only S stock is allowed on the Wimbledon and Richmond
branches now? How does this affect maintenance trains made up of old tube
stock for example?

Anything else which requires to go down there will also have been rewired
appropriately for 750V.

Some of LUs maintenance stock is ancient. I suspect thats a lot easier said
than done.

Anything in use will have had a rewire at some point in the last few
decades because the insulation of older wiring (either VIR or cotton
fabric) degrades over time.

LUs battery locos are now on their third generation of batteries, for
example. The TRC is hauled by 1960 motors; the Central Line RATs are 1962
stock though they don't leave the Central Line.

Well thats the wiring sorted, but I doubt they've changed the motors. Those
are expensive bits of kit to burn out.