Re: "lost" trains

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

Notagunzel wrote:

>
> This DPU device, does NSW use many of these?  I have to admit I'd never
> heard of them used in NSW up to now, a similar sort of device was used on
> certain Track Circuits in Victoria in the height of the Sprinter panic, but
> AFAIK they were removed once the Sprinters got Track Circuit Assistors
> fitted.  The Victorian Device (Track Shunt Device?) was a primary battery
> powered metal proximity detector which dumped a short across the rails for x
> seconds after a wheel passed them.
>
> --
> Mr Notagunzel.
> Rail Transportation Connoisseur
> notagunzel@bigfoot.com
> (Regrets to announce there will be no further moves at
> http://www.geocities.com/nota_gunzel
> until further notice is issued from this office)

 The DPU devices are now quite common in the inner Sydney area, ie Sydenham,
ESR, and the City circle. The primary purpose of introducing these devices is to
shorten the length of a track circuit without going to all the expense of
installing extra track circuits. Especially where there is a  need for close
running of trains, ie the ESR line, and city circle line.

I hope this helps

Stuart Ellis