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#1
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Overhead wire in moorgate line stations
Anyone know why there's an overhead wire on the southbound of highbury station
(and maybe others, I didn't check) on the moorgate line? Its obviously not some old catenary since the line was always 3rd/4th rail and its only hung from the ceiling by some thin wires anyway. Is it in case a pan is left up at Drayton? |
#2
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Overhead wire in moorgate line stations
I do not know. But this is one of those things where I immediately think, I've got to go and see it. I'VE GOT TO GO AND SEE IT!
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Overhead wire in moorgate line stations
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#5
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Overhead wire in moorgate line stations
On 07/12/2017 21:31, wrote:
In article , () wrote: Anyone know why there's an overhead wire on the southbound of highbury station (and maybe others, I didn't check) on the moorgate line? Its obviously not some old catenary since the line was always 3rd/4th rail and its only hung from the ceiling by some thin wires anyway. Is it in case a pan is left up at Drayton? Whole platform length or just a short section? https://commons.wikimedia.org/wiki/F...look_north.JPG -- Robin reply-to address is (intended to be) valid |
#6
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Overhead wire in moorgate line stations
On 08/12/17 10:48, Robin wrote:
On 07/12/2017 21:31, wrote: In article , () wrote: Anyone know why there's an overhead wire on the southbound of highbury station (and maybe others, I didn't check) on the moorgate line? Its obviously not some old catenary since the line was always 3rd/4th rail and its only hung from the ceiling by some thin wires anyway. Is it in case a pan is left up at Drayton? Whole platform length or just a short section? https://commons.wikimedia.org/wiki/F...look_north.JPG CBTC radio? https://en.wikipedia.org/wiki/Commun..._train_control http://www.railjournal.com/index.php...frequency.html -- Adrian C |
#7
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Overhead wire in moorgate line stations
On Sun, 10 Dec 2017 15:57:32 +0000
Adrian Caspersz wrote: On 08/12/17 10:48, Robin wrote: On 07/12/2017 21:31, wrote: In article , () wrote: Anyone know why there's an overhead wire on the southbound of highbury station (and maybe others, I didn't check) on the moorgate line? Its obviously not some old catenary since the line was always 3rd/4th rail and its only hung from the ceiling by some thin wires anyway. Is it in case a pan is left up at Drayton? Whole platform length or just a short section? https://commons.wikimedia.org/wiki/F...n_Great_Northe n_southbound_look_north.JPG CBTC radio? https://en.wikipedia.org/wiki/Commun..._train_control http://www.railjournal.com/index.php...eps-up-victori -line-frequency.html Only if they're using long wave! |
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Overhead wire in moorgate line stations
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#9
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Overhead wire in moorgate line stations
On Sat, 16 Dec 2017 23:44:02 +0000
"Clive D.W. Feather" wrote: In article , writes Anyone know why there's an overhead wire on the southbound of highbury station (and maybe others, I didn't check) on the moorgate line? Its obviously not some old catenary since the line was always 3rd/4th rail and its only hung from the ceiling by some thin wires anyway. Is it in case a pan is left up at Drayton? I believe that's the case, yes; it's not powered, it's just to stop the pan disassembing itself on the tunnel roof. I've a vague memory that it was put in when the line was handed over to BR. That seemed the most likely scenario to me. Wonder how often the pan gets left up on that line? Must happen occasionally. |
#10
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Overhead wire in moorgate line stations
On 18.12.17 10:10, wrote:
On Sat, 16 Dec 2017 23:44:02 +0000 "Clive D.W. Feather" wrote: In article , writes Anyone know why there's an overhead wire on the southbound of highbury station (and maybe others, I didn't check) on the moorgate line? Its obviously not some old catenary since the line was always 3rd/4th rail and its only hung from the ceiling by some thin wires anyway. Is it in case a pan is left up at Drayton? I believe that's the case, yes; it's not powered, it's just to stop the pan disassembing itself on the tunnel roof. I've a vague memory that it was put in when the line was handed over to BR. That seemed the most likely scenario to me. Wonder how often the pan gets left up on that line? Must happen occasionally. Is there nothing that will force a pan drop? One Metro-North, for example, the M2 runs dual-mode DC on 3rd rail and AC under the wire. I assume that the same happens with the newer M8. As soon as that train's shoes come into contact with live 3rd rail, the pantographs automatically come down. The train will not take power, however, until the engineer sets the power mode switch to the proper setting. The engineer will normally set the mode switch to DC, which also drops the pans, though I have at times seen them coast into 3rd rail with the pans up, and then only switch the power made when the train is out of the wire. |
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