Re: Train Order working in NSW

[keithm@commslab.gov.au (Dave Malcolm)]

In article <2pfk4.12960$3b6.56174@ozemail.com.au> "Barry Campbell" <campblbm@ozemail.com.au> writes:
>From: "Barry Campbell" <campblbm@ozemail.com.au>
>Subject: Train Order working in NSW
>Date: Fri, 28 Jan 2000 21:36:26 +1100

>I have just come back from a trip to Melbourne via the Newell Highway. It
>certainly makes Qantas attractive!

>Of course, I took the opportunity to look at any relevant railway sites in
>the process. The most obvious thing to see is the installation of the new
>style of point indicators, similar to those used by QR. The difference
>between the NSW and Qld installations are that the Qld ones generally
>indicate the direction of a set of throwover points whereas the NSW ones
>indicate the status of the facing point lock.

>What I want to know is

>When does the NSW type machine indicate anything other than clear? Is it as
>soon as the the FPL starts to move or is it later?

They move with the lever.

>What is the indicator meant to indicate under TO working? At present a
>driver can be assured that the points at an intermediate siding are locked
>as he (generally) has the key. At a staff station, the points are normally
>detected and the home signal cannot be pulled off without the points being
>set correctly and locked.

They indicate the points are set and locked for a straight ahead movement.

>What happens  when TO working is introduced? Is the ground frame simply set
>up so that it works independently of signals or tokens? If so, how? Is there
>a standard key used to unlock ground frames, presumably under the authority
>of a train order?

I presume the would be unlocked with the annet key, which would be in the 
signal box, on one of the levers, which is current practice.

Dave Malcolm

>Does anyone know?

>Barry Campbell