London Banter - View Single Post

Colin Rosenstiel · November 14th 06, 11:34 AM posted to uk.transport.london

In article . com,
(TheOneKEA) wrote:

While doing a bit of idle research into the upcoming Standard Stock
(aka 'S' Stock) being designed for the Underground's Sub Surface
Lines, I came across an interesting note which stated that regenerative
braking is to be provided and used by the S stock on the SSL lines,
and _only_ on the SSL lines - the S stock running District Line
services to Richmond and Wimbledon will not regenerate when they are
on NR metals.

I'm guessing that the trains will achieve this by using some kind of
mechanism which can detect the voltage level of the negative pole of
the traction circuit and subsequently cut in the regen mechanism
when the negative pole is within the appropriate voltage range. Does
anyone know how this could be accomplished?

How modern! The O Stock of 1937 was designed for regeneration!

There's no reason in principle why the trains shouldn't use regeneration
on NR too. It will just need modifications to the power supply system. I
hope they get on and make them so that the trains' energy consumption is
reduced.

--
Colin Rosenstiel