Interlockings: Difference between revisions

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{| class="wikitable"  
{| class="wikitable"  
! Interlocking !! Site Code !! Type !! Controlled !! Distance from<br>Panel Box !! Commissioned !! De-commissioned  
! Interlocking !! Site Code !! Type !! Controlled !! Area !! Distance from<br>Panel Box !! Commissioned !! De-commissioned  
|-
|-
| [[Uffington]] || S.277 || BR(WR) E10k Freewired || Electronic Link || 10 3/4 miles || 30 May 1965<ref name="BPSR">British Power Signalling Register (http://www.bpsr.org.uk)</ref> || Extant
| [[Uffington]] || S.277 || BR(WR) E10k Freewired || Electronic Link || 61m60 - 70m40 MLN<ref name="mas_scheme_statistics">MAS Scheme Statistics Sheet</ref> || 10 3/4 miles<ref name="remote_controls">[[Media:Remote_Controls.pdf|Diagram of Remote Control Systems for initial scheme]] (undated)</ref> || 30 May 1965<ref name="BPSR">British Power Signalling Register (http://www.bpsr.org.uk)</ref> || 0135 21 Nov 2015
|-
|-
| [[Bourton]] || S.280 || BR(WR) E10k Freewired || Electronic Link || || 01 October 1977<ref name="BPSR" /> || Extant 
| [[Bourton]] || S.280 || BR(WR) E10k Freewired || Electronic Link || 70m40 - 73m00 MLN<ref name="mas_scheme_statistics"/> || || 01 October 1977<ref name="BPSR" /> || 0135 21 Nov 2015
|-
|-
| [[South Marston]] || S.282 || BR(WR) E10k Freewired || Electronic Link || || 11 June 2000<ref name="BPSR" /> || Extant 
| [[South Marston]] || S.282 || BR(WR) E10k Freewired || Electronic Link || 73m00 - 75m20* MLN<ref name="mas_scheme_statistics"/> || || 11 June 2000<ref name="BPSR" /> || 0135 21 Nov 2015
|-
|-
| [[Highworth]] || S.283 || BR(WR) E10k Freewired || Direct || 1 mile || 03 March 1968<ref name="BPSR" /> || Extant 
| [[Highworth]] || S.283 || BR(WR) E10k Freewired || Direct || 73m00* - 75m20 MLN<ref name="mas_scheme_statistics"/> || 1 mile<ref name="remote_controls"/>  || 03 March 1968<ref name="BPSR" /> || 0135 21 Nov 2015
|-
|-
| Swindon || S.296 || BR(WR) E10k Freewired || Direct || At Panel Box || 03 March 1968<ref name="BPSR" /> || Extant 
| Swindon || S.296 || BR(WR) E10k Freewired || Direct || 76m40 - 80m20 MLN<ref name="mas_scheme_statistics"/> || At Panel Box || 03 March 1968<ref name="BPSR" /> || 0135 21 Nov 2015
|-
|-
| [[Wootton Bassett]] East || S.306 || BR(WR) E10k Freewired || Direct || 6 miles || 23 March 1968<ref name="BPSR" /> || Extant 
| [[Wootton Bassett]] East || S.306 || BR(WR) E10k Freewired || Direct / Converted to Remove Control ~2010 || 80m20 - 89m00 MLN<br>-83m60 SWB<ref name="mas_scheme_statistics"/>|| 6 miles<ref name="remote_controls"/> || 23 March 1968<ref name="BPSR" /> || 0112 23 Jan 2016
|-
|-
| [[Chippenham]] || S.318 || BR(WR) E10k Freewired || Electronic Link || 16 1/2 miles || 23 March 1968<ref name="BPSR" /> || Extant  
| [[Chippenham]] || S.318 || BR(WR) E10k Freewired || Electronic Link || 83m60 - 94m40 MLN<ref name="mas_scheme_statistics"/> || 16 1/2 miles<ref name="remote_controls"/> || 23 March 1968<ref name="BPSR" /> ||  0112 23 Jan 2016
|-
|-
| [[Thingley]] Jcn ||  || BR(WR) E10k Freewired || Electronic Link || 19 miles || 23 March 1968<ref name="BPSR" /> || 11 February 1975  
| [[Thingley]] Jcn ||  || BR(WR) E10k Freewired || Electronic Link ||  || 19 miles<ref name="remote_controls"/> || 23 March 1968<ref name="BPSR" /> || 11 February 1975  
|-
|-
| [[Thingley]] || S.320 || BR(WR) E10k Freewired || Electronic Link || || 11 February 1975<ref name="BPSR" /> || Extant  
| [[Thingley]] || S.320 || BR(WR) E10k Freewired || Electronic Link || 94m40 - 97m60 MLN<ref name="mas_scheme_statistics"/> || || 11 February 1975<ref name="BPSR" /> ||  0112 23 Jan 2016
|-
|-
| [[Wootton Bassett]] West || S.308 || BR(WR) E10k Freewired || Electronic Link || || ca. early 1980<ref name="BPSR" /> || Extant  
| [[Wootton Bassett]] West || S.308 || BR(WR) E10k Freewired || Electronic Link || 83m60 - 89m00 SWB<ref name="mas_scheme_statistics"/>|| || 6 October 1975<ref>[43/W/2715]</ref> || 0112 23 Jan 2016
|-
|-
| [[Hullavington]] || S.313 || BR(WR) E10k Freewired || Electronic Link || 17 miles || 23 March 1968<ref name="BPSR" /> || Extant  
| [[Hullavington]] || S.313 || BR(WR) E10k Freewired || Electronic Link || 89m00 - 97m00 SWB<ref name="mas_scheme_statistics"/>|| 17 miles<ref name="remote_controls"/> || 23 March 1968<ref name="BPSR" /> || 20 February 2016  
|-
|-
| [[Kemble]] || S.332 || BR(WR) E10k Freewired || Electronic Link || 13 3/4 miles || 27 July 1968<ref>K2 Week 30 1968</ref> || 0108 19 August 2014<ref>Swindon Panel Occurrence Book</ref>
| [[Kemble]] || S.332 || BR(WR) E10k Freewired || Electronic Link || 79m40 - 93m00 SWM<ref name="mas_scheme_statistics"/>|| 13 3/4 miles<ref name="remote_controls"/> || 27 July 1968<ref>K2 Week 30 1968</ref> || 0108 19 August 2014<ref>Swindon Panel Occurrence Book</ref>
|-
|-
|}
|}
* South Marston and Highworth are listed with identical mileages.
Some other mileages overlap or have gaps between, but are reproduced faithfully here.


The Uffington interlocking was commissioned before Swindon Panel came into existence as it was originally controlled by Uffington signal box.  It migrated to control by Swindon Panel on 3 March 1968.
The Uffington interlocking was commissioned before Swindon Panel came into existence as it was originally controlled by Uffington signal box.  It migrated to control by Swindon Panel on 3 March 1968.


The Swindon interlocking is located at the signal box with the panel and is controlled directly.  All the other interlockings are sited at their geographical locations, remote from Swindon Panel, and are controlled through remote control systems.
The Swindon interlocking is located at the signal box with the panel and is controlled directly.  All the other interlockings are sited at their geographical locations, remote from Swindon Panel, and are controlled through remote control systems. In some cases [[Remote Control Overrides|overrides]] (aka Through Routes) are provided for use in the case of a failure of the remote control system.


A small interlocking at Minety, controlled from Minety Crossing Box, existed by 27 July 1968 until 09 August 2014 (when the crossing was converted to CCTV).  
A small interlocking at Minety, controlled from Minety Crossing Box, existed by 27 July 1968 until 09 August 2014 (when the crossing was converted to CCTV).  


A small interlocking at Purton, controlled from Purton Crossing, existed by 27 July 1968 and has since been abolished.  
A small interlocking at Purton, controlled from Purton Crossing, existed by 27 July 1968 and has since been abolished.  
==Panel Indications of Remote Control Boundaries==
In the case of remote control failure a single white route light flashes on each line at the boundary of the failure. A single white light is shared between adjacent interlockings and flashes when the remote control either side fails.
The lights are:
{| class="wikitable"
|-
!Between !! And !! Line !! White lights
|-
| rowspan="2" | Swindon B || rowspan = "2" | Uffington || Down Main || East end (SB)PV<ref name="SB_Uff">SPS Photo site: https://flic.kr/p/pqax6X</ref><br>End of panel
|-
| Up Main || East end (SB)TB-TE<ref name="SB_Uff" /><br>End of panel
|-
| rowspan="2" | Uffington || rowspan = "2" | Bourton || Down Main || West end AM<ref name="Uff_BN">SPS Photo site: https://flic.kr/p/p8EDbb</ref>
|-
| Up Main || West end KO<ref name="Uff_BN" />
|-
| rowspan="2" | Bourton || rowspan = "2" | South Marston || Down Main || East end AT<ref name="BN_SM">SPS Photo site: https://flic.kr/p/po8z3Q</ref>
|-
| Up Main || East end KG<ref name="BN_SM" />
|-
| rowspan="2" | South Marston || rowspan = "2"| Swindon || Down Main || West end XD<ref name="SM_SN">SPS Photo site: https://flic.kr/p/p8FEyg</ref>
|-
| Up Main || West end YA<ref name="SM_SN" />
|-
|South Marston || (Euroterminal) || Goods Reception || West end ZA<br>(End of indications)<ref name="SM_SN" />
|-
| rowspan="2" | Swindon || rowspan = "2" | Wootton Bassett East || Down Main || rowspan="2" | (See notes)
|-
| Up Main
|-
| rowspan="2" | Wootton Bassett East || rowspan = "2" | Chippenham || Down Main || East end CH<ref name="Chip_Vid">SPS Photo site: https://flic.kr/p/p8FDKn</ref>
|-
| Up Main || East end HK<ref name="Chip_Vid"/>
|-
| rowspan="2" | Chippenham || rowspan = "2" | Thingley || Down Main || West end CP<ref name="Chip_Vid"/>
|-
| Up Main || East end HE<ref name="Chip_Vid"/>
|-
| rowspan="2" | Thingley|| rowspan = "2" | Bathampton || Down Main || West end (B)AC-XG<ref name="Chip_Vid"/><br>End of panel.
|-
| Up Main || West end GX<ref name="Chip_Vid"/><br>End of panel
|-
|Thingley|| Bradford Jn || Single || West end (W)RJ/ETC<ref name="Chip_Vid"/><br>End of panel.
|-
| rowspan="2" | Wootton Bassett East || rowspan = "2" | Wootton Bassett West || Down Badminton ||
|-
| Up Badminton ||
|-
| rowspan="2" | Wootton Bassett West || rowspan = "2" | Hullavington || Down Badminton ||
|-
| Up Badminton ||
|-
| rowspan="2" | Hullavington|| rowspan = "2" | Chipping Sodbury || Down Badminton|| West end DB101-(B)SG<br>End of panel
|-
| Up Badminton || West end UB96<br>End of panel.
|-
| Swindon || Kemble || Single ||
|-
| rowspan="2" | Kemble|| rowspan = "2"| Standish || Down Kemble || West end (G)PT
|-
| Up Kemble ||West end (G)PS
|}
Swindon <> Wootton Bassett East -
Wootton Bassett East used to be direct wired, but latterly was controlled by Remote Control. Not sure if indication lamps were fitted at the boundary....


==Related Documents==
==Related Documents==

Latest revision as of 22:08, 6 May 2016

The interlockings controlled by Swindon Panel have a standard circuitry design known as BR(WR) E10k, derived from the reference number of the series of drawings describing this design (E10000 series). It is a freewired interlocking design (Western Region never used geographical interlockings). The term 'freewired' means that all of the interlocking is bespoke to its particular location, consisting of individual relays wired together to suit that particular application. By contrast, a geographical interlocking consists of pre-wired generic packs of relays which are combined together like building blocks to build up the interlocking. Geographical interlockings are quicker to install and require less on-site testing but as not all of the available functions in each relay pack may be required there can be considerable redundancy. The wasted expenditure of this redundancy and the higher initial cost of pre-packaged units has to be balanced against the savings in installation and testing costs. Western Region decided that, in their opinion, freewired interlockings provided better value for money.

The first E10k interlocking was installed at West Ealing in 1955. The panel at West Ealing was supplied by MV-GRS to their standard NX Turn-Push design and the E10k interlocking system was influenced by MV-GRS interlocking practice.

The table below shows the interlockings in the Swindon Panel area:

Interlocking Site Code Type Controlled Area Distance from
Panel Box		 Commissioned De-commissioned
Uffington S.277 BR(WR) E10k Freewired Electronic Link 61m60 - 70m40 MLN[1] 10 3/4 miles[2] 30 May 1965[3] 0135 21 Nov 2015
Bourton S.280 BR(WR) E10k Freewired Electronic Link 70m40 - 73m00 MLN[1] 01 October 1977[3] 0135 21 Nov 2015
South Marston S.282 BR(WR) E10k Freewired Electronic Link 73m00 - 75m20* MLN[1] 11 June 2000[3] 0135 21 Nov 2015
Highworth S.283 BR(WR) E10k Freewired Direct 73m00* - 75m20 MLN[1] 1 mile[2] 03 March 1968[3] 0135 21 Nov 2015
Swindon S.296 BR(WR) E10k Freewired Direct 76m40 - 80m20 MLN[1] At Panel Box 03 March 1968[3] 0135 21 Nov 2015
Wootton Bassett East S.306 BR(WR) E10k Freewired Direct / Converted to Remove Control ~2010 80m20 - 89m00 MLN
-83m60 SWB[1]		 6 miles[2] 23 March 1968[3] 0112 23 Jan 2016
Chippenham S.318 BR(WR) E10k Freewired Electronic Link 83m60 - 94m40 MLN[1] 16 1/2 miles[2] 23 March 1968[3] 0112 23 Jan 2016
Thingley Jcn BR(WR) E10k Freewired Electronic Link 19 miles[2] 23 March 1968[3] 11 February 1975
Thingley S.320 BR(WR) E10k Freewired Electronic Link 94m40 - 97m60 MLN[1] 11 February 1975[3] 0112 23 Jan 2016
Wootton Bassett West S.308 BR(WR) E10k Freewired Electronic Link 83m60 - 89m00 SWB[1] 6 October 1975[4] 0112 23 Jan 2016
Hullavington S.313 BR(WR) E10k Freewired Electronic Link 89m00 - 97m00 SWB[1] 17 miles[2] 23 March 1968[3] 20 February 2016
Kemble S.332 BR(WR) E10k Freewired Electronic Link 79m40 - 93m00 SWM[1] 13 3/4 miles[2] 27 July 1968[5] 0108 19 August 2014[6]
  • South Marston and Highworth are listed with identical mileages.

Some other mileages overlap or have gaps between, but are reproduced faithfully here.

The Uffington interlocking was commissioned before Swindon Panel came into existence as it was originally controlled by Uffington signal box. It migrated to control by Swindon Panel on 3 March 1968.

The Swindon interlocking is located at the signal box with the panel and is controlled directly. All the other interlockings are sited at their geographical locations, remote from Swindon Panel, and are controlled through remote control systems. In some cases overrides (aka Through Routes) are provided for use in the case of a failure of the remote control system.

A small interlocking at Minety, controlled from Minety Crossing Box, existed by 27 July 1968 until 09 August 2014 (when the crossing was converted to CCTV).

A small interlocking at Purton, controlled from Purton Crossing, existed by 27 July 1968 and has since been abolished.

Related Documents

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 MAS Scheme Statistics Sheet
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Diagram of Remote Control Systems for initial scheme (undated)
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 British Power Signalling Register (http://www.bpsr.org.uk)
  4. ↑ [43/W/2715]
  5. ↑ K2 Week 30 1968
  6. ↑ Swindon Panel Occurrence Book

Researchers compiling pages - please see the Research Guidance - Routes

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