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[email protected] · January 25th 20, 09:32 AM posted to uk.railway,uk.transport.london

On Fri, 24 Jan 2020 19:55:18 +0000
Charles Ellson wrote:
On Fri, 24 Jan 2020 17:10:13 +0000 (UTC), wrote:

On 24 Jan 2020 15:25:11 GMT
Marland wrote:
Once it was done they had to be towed from Acton to Wimbledon by battery
locomotives with the positive shoe fuses removed as any current going into
LTs running rail track circuits would have caused problems , once at
Wimbledon on the Southern the fuses were put back and the units driven
away on the third rail. That’s what happened for the stock converted in
the mid sixties, I don’t know the movements of the 1938 stock when it got
converted.

There must have been more to it than that because I can't imagine putting
750V through equipment thats expecting 630V for a couple of hours as it
slowly makes its way to the coast could end all that well.

Don't use full parallel ?
AFAIAA the main consideration for running LU stock on BR/NR was the
insulation not the motors. Older tube stock was only insulated to cope
with ~+420v to earth on LU thus any running over LMS/BR shared tracks
required to be rewired; ISTR there were restrictions on which surface
stock was allowed on SR (I am going back to the days of Q stock or
older). Current stock is insulated for 750v, allowing for working over
shared NR or any part of LU that might get converted to third rail.

Not sure an LU train would be much use on 3rd rail tbh

The ELL got converted
to 3rd rail to become part of the Overground (unfortunately - **** poor slow
service and subject to SR delays, would have been much better left as a self
contained tube line running to highbury) but I can't see that happening anywhere
else on the tube anytime soon.