Re: Sunbury Resignalling

[David Langley <del@ancc.com.au>]

notagunzel@hotmail.com wrote:

> This Weekend, the Signalling at Sunbury was blown up.
> The Track Layout now looks like this:
> (I hope this works)
>
>         Xing   Dn Plat.             Bridge
> Melb    \ /     |____|    _________  _   _  Bendigo
> ________|_|______________/_________\__|_|__________
> ________|_|__\______________/_________|_|__________
>         | |      ____                _| |_
>         / \     |    |
>                Up Plat.
>
> Terminating trains can now arrive direct into the Up Platform, which is where
> the office is, closer to the town, and next to the bus interchange.  Both
> crossovers are new, the one at the down end was allegedly installed 2
> weekends ago replacing the remains of the former centre road, the one at the
> Up end was installed many moons ago, and remaining spiked out until this
> weekend.  Both crossovers are motor operated, and the siding is secured by
> miniature Annett Keys (E + F pattern).  There is a new panel in the Station
> office, next to the old Frame, a 7 lever Rocker, which has been sold.  The
> interlocking is a Westrace CBI in a brutal green concrete hut on the Up
> platform.  There are 9 signals (I think), 2 Distants, 1 Dwarf and 6 Homes.
> The Highlight is the Down Home just before the Facing Crossover.  It is a
> lattice Bracket Post, probably from North of Seymour, with a 2 Homes to each
> platform, and a calling on light to the Up platform.  It is a bit odd to have
> a CBI (Computer Based Interlocking to the illinformed) controlling a signal
> on a ancient lattice post.
>
> Hope this is comprehendeble,
> BC
>
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The Sunbury signalling is still two position even with the modern? interlocking
system hence the provision of a bracket post with two arms (lights in two
position areas are still referred to as arms) and a calling on. The calling on
enables the loco of terminating trains to be signalled back onto their train. The
dwarf signal at the down end is to permit locos to reverse from the down line
through the down platform and up to a Limit of Shunt board near the level
crossing on the down line prior to reversing through the up end crossover to the
up platform. It is interesting to note that two quotes were put in for this job.
The other was for the provision of a larger manual interlocking frame to work the
layout largely as described above. This was knocked on the head probably because
of the image factor, we can't be seen to be installing mechanical frames in the
1990's. We did at Wallan though, perhaps Wallan is not in the limelight of
comuter land.

David Langley.