Re: High-voltage track circuits

[Stuart Ellis <mpp@zipworld.com.au>]

> J/S track circuit are in use in lots of places, but the location remember in
> particular is Port Kembla Inner Harbour (which I had a hand in doing much of
> the track circuit commissioning for) where they were used specifically
> because of the coal and grain dust from the coal and grain unloaders, as
> well as rusting of the steel due to proximity to the sea water, and other
> types of noxious problems which could cause conventional AC or even
> audio-frequency track circuits like the CSEE and ML types, to fail and be
> unreliable.
>
> Actually, Mortdale yard (the new signalling) has J/S track circuits I think,
> as did Glenlee coal prep siding. I'm sure other people will tell us other
> places where they are used.
>
> Regards,
>
> Craig.
> -

Jeumont track circuits are mainly used these days over points or places where a high build up of
rust may occur, ( as you have noted Craig) as the high pulses help break down rust on the surface
of the rail.   I hope this helps

Stuart Ellis