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Third rail systems return path
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Third rail systems return path
wrote:
On Fri, 24 Jan 2020 11:18:14 -0800 (PST) wrote: d gone, the majority of the Southern was upgraded to 750 V with the only re= maining 660 V sections in inner London (owing to the interfaces with London= Underground at Wimbledon and Richmond (because C and D stock were 630 V un= its whereas S stock is designed to operate at 750 V) and the fact that the = Does the 750V mean only S stock is allowed on the Wimbledon and Richmond branches now? How does this affect maintenance trains made up of old tube stock for example? Anything else which requires to go down there will also have been rewired appropriately for 750V. Anna Noyd-Dryver |
Third rail systems return path
On Sat, 25 Jan 2020 10:58:40 -0000 (UTC)
Anna Noyd-Dryver wrote: wrote: On Fri, 24 Jan 2020 11:18:14 -0800 (PST) wrote: d gone, the majority of the Southern was upgraded to 750 V with the only re= maining 660 V sections in inner London (owing to the interfaces with London= Underground at Wimbledon and Richmond (because C and D stock were 630 V un= its whereas S stock is designed to operate at 750 V) and the fact that the = Does the 750V mean only S stock is allowed on the Wimbledon and Richmond branches now? How does this affect maintenance trains made up of old tube stock for example? Anything else which requires to go down there will also have been rewired appropriately for 750V. Some of LUs maintenance stock is ancient. I suspect thats a lot easier said than done. |
Third rail systems return path
wrote:
On Sat, 25 Jan 2020 10:58:40 -0000 (UTC) Anna Noyd-Dryver wrote: wrote: On Fri, 24 Jan 2020 11:18:14 -0800 (PST) wrote: d gone, the majority of the Southern was upgraded to 750 V with the only re= maining 660 V sections in inner London (owing to the interfaces with London= Underground at Wimbledon and Richmond (because C and D stock were 630 V un= its whereas S stock is designed to operate at 750 V) and the fact that the = Does the 750V mean only S stock is allowed on the Wimbledon and Richmond branches now? How does this affect maintenance trains made up of old tube stock for example? Anything else which requires to go down there will also have been rewired appropriately for 750V. Some of LUs maintenance stock is ancient. I suspect thats a lot easier said than done. Anything in use will have had a rewire at some point in the last few decades because the insulation of older wiring (either VIR or cotton fabric) degrades over time. LUs battery locos are now on their third generation of batteries, for example. The TRC is hauled by 1960 motors; the Central Line RATs are 1962 stock though they don't leave the Central Line. Anna Noyd-Dryver |
Third rail systems return path
On Sat, 25 Jan 2020 17:23:34 -0000 (UTC)
Anna Noyd-Dryver wrote: wrote: On Sat, 25 Jan 2020 10:58:40 -0000 (UTC) Anna Noyd-Dryver wrote: wrote: On Fri, 24 Jan 2020 11:18:14 -0800 (PST) wrote: d gone, the majority of the Southern was upgraded to 750 V with the only re= maining 660 V sections in inner London (owing to the interfaces with London= Underground at Wimbledon and Richmond (because C and D stock were 630 V un= its whereas S stock is designed to operate at 750 V) and the fact that the = Does the 750V mean only S stock is allowed on the Wimbledon and Richmond branches now? How does this affect maintenance trains made up of old tube stock for example? Anything else which requires to go down there will also have been rewired appropriately for 750V. Some of LUs maintenance stock is ancient. I suspect thats a lot easier said than done. Anything in use will have had a rewire at some point in the last few decades because the insulation of older wiring (either VIR or cotton fabric) degrades over time. LUs battery locos are now on their third generation of batteries, for example. The TRC is hauled by 1960 motors; the Central Line RATs are 1962 stock though they don't leave the Central Line. Well thats the wiring sorted, but I doubt they've changed the motors. Those are expensive bits of kit to burn out. |
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