Re: Near miss at Victoria (London)

[David Johnson <trainman@ozemail.com.au>]

jjjim wrote:

> Yea h In brissy Theres a guy in a big arse seat  that is responsible for
> cutting Overhead power From a computer.
>
> The guys on track can however Cut the breakers manually,  But u can image
> the Arc  with to trains at full power,  on a 22Kv line.   So id say  they
> are only used as 'definate' isolation of power,  rather than cutting power
> while online

I would suggest a breaker or knife switch opening 25kVAC at 50 Amps would have
a much smaller arc than opening 1500VDC at 1000 Amps.

--
David Johnson
trainman@ozemail.com.au
http://www.ozemail.com.au/~trainman/
------------------------------------
These comments are made in a private
capacity and do not represent the
official view of State Rail.
C.O.W.S. Page 11.