SN.28: Difference between revisions

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The signal shares its large overall gantry with [[SN.628]].
The signal shares its large overall gantry with [[SN.628]].
==Movement onto gantry==
The signal was moved onto a gantry (in preparation for the installation of SN.628) in March 1976:
[[File: 1976-06.png | border]]
==Junction Controls==
Originally all the diverging routes from this signal were approach released. In May 1988, the signals in rear of SN.28 ([[SN.22]] and [[SN.24]] were given the capability to flash double yellow and single yellow respectively when SN.28 was cleared towards Platform 3.
[[File: 1988-01.png|border]]


==Adjustments==
==Adjustments==
Line 12: Line 24:
SN.28 had a route, with a number 1 junction indicator, towards the Down Goods. The route was made unavailable with the removal of 335B points at 05.15 on Monday 25 February 2008.
SN.28 had a route, with a number 1 junction indicator, towards the Down Goods. The route was made unavailable with the removal of 335B points at 05.15 on Monday 25 February 2008.


[[File:SN28_SN628.jpg|thumb|450px|right|SN.28, on its gantry with [[SN.628]], after the removal of the no 1 JI.]]
[[File:WON-2008-01.png | border]]
[[File:WON-2008-01.png | border]]


Line 18: Line 31:
[[File:WON-2011-01.png | border]]
[[File:WON-2011-01.png | border]]


[[File:SN28_SN628.jpg|thumb|450px|left|SN.28, on its gantry with [[SN.628]], after the removal of the no 1 JI.]]
 
==Shunting behind [[SN.263]]==
 
In 2009, [[332]] points were re-layed 100 yards nearer to Bristol, reducing the standage between [[SN.263]] and [[SN.28]] to 6 SLUs (130 feet). A box instruction was added requiring that when a shunting movement was to travel towards SN.28 to reverse behind [[SN.263]] then SN.28 must be off, to remove the SPAD risk of a drive believing the loco(s) would fit in between the signals (where they previously would have done).
 
[[File:WON-2009-01.png | border]]

Latest revision as of 21:36, 15 November 2014

SN.28, with its no 1 JI to the Down Goods

Back to Control Functions

Description

This signal is the last on the Down Main before Swindon Station and protects all the connections at the east end of the station.

The signal shares its large overall gantry with SN.628.

Movement onto gantry

The signal was moved onto a gantry (in preparation for the installation of SN.628) in March 1976:

1976-06.png

Junction Controls

Originally all the diverging routes from this signal were approach released. In May 1988, the signals in rear of SN.28 (SN.22 and SN.24 were given the capability to flash double yellow and single yellow respectively when SN.28 was cleared towards Platform 3.

1988-01.png

Adjustments

SN.28 had a route, with a number 1 junction indicator, towards the Down Goods. The route was made unavailable with the removal of 335B points at 05.15 on Monday 25 February 2008.

SN.28, on its gantry with SN.628, after the removal of the no 1 JI.

WON-2008-01.png

335A points and the number 1 junction indicator on SN.28 were finally removed permanently at 05.15 on Monday 21 December 2011:

WON-2011-01.png


Shunting behind SN.263

In 2009, 332 points were re-layed 100 yards nearer to Bristol, reducing the standage between SN.263 and SN.28 to 6 SLUs (130 feet). A box instruction was added requiring that when a shunting movement was to travel towards SN.28 to reverse behind SN.263 then SN.28 must be off, to remove the SPAD risk of a drive believing the loco(s) would fit in between the signals (where they previously would have done).

WON-2009-01.png