London Banter - View Single Post

[email protected] · February 16th 11, 09:42 AM posted to uk.transport.london

On Tue, 15 Feb 2011 15:14:08 -0600
wrote:
They cope only with difficulty. In DC electrified areas AC track circuits
tend to be used to avoid interference and in AC electrified areas they
tend to use DC track circuits. As you can see there is no third way to use
in dual-electrified areas. I don't know if similar considerations apply to
axle counters.

Given all the harmonics produced by modern electronic power systems on trains
surely most track circuits would be pretty well filtered anyway?

B2003