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Old December 20th 17, 05:16 PM posted to uk.transport.london
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Default Overhead wire in moorgate line stations

Why do these threads carry on for so long?
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Old December 21st 17, 02:07 AM posted to uk.transport.london
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Default Overhead wire in moorgate line stations

On 2017\12\20 18:16, Offramp wrote:
Why do these threads carry on for so long?


To stop the pan coming off the end?


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Old December 21st 17, 12:33 PM posted to uk.railway,uk.transport.london
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Default Overhead wire in moorgate line stations

On 21.12.17 10:34, wrote:
On Thu, 21 Dec 2017 00:24:04 +0000
" wrote:
On 20.12.17 22:44, Clive D.W. Feather wrote:
In article ,

writes
What about in the reverse direction? You want the pan to come up while
in the transition area.

Nope, got to set the mode switch and manually raise them. Pans will also
not go up if any part of the train is on contact with the 3rd rail.

So what do you do at the equivalent of Drayton Park, where the train
comes to a stop on the 3rd rail but needs to start on the overhead
because the third rail ends 5 metres beyond the front of the stopped
train?

I was speaking about M-2s, and not about 313s. I assumed, in the latter
case, that there is a mode switch.


So you mean they won't go up automatically, not won't go up at all?


Exactly. The driver (engineer) switches the power mode, then hits the
"pan up" switch.

Because
if they won't go up at all when on 3rd rail you've got a problem, unless over
there they have to coast off the 3rd rail


They coast off the 3rd rail and then raise when completely under the
wire and moving. It's done on the fly, AIUI, to help the train quickly
assimilate the new power.

then hope the pan works because if
not then that'll be the whole line blocked with a dead train.


M2s and M8s are married pairs, coupled into a consist. Each of those
pairs has a pantograph, and they all go up. Thus, if one of them does
not work, the other ones will take over.


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Old December 21st 17, 10:45 PM posted to uk.railway,uk.transport.london
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Default Overhead wire in moorgate line stations

On Thu, 21 Dec 2017 13:33:34 +0000, "
wrote:

On 21.12.17 10:34, wrote:
On Thu, 21 Dec 2017 00:24:04 +0000
" wrote:
On 20.12.17 22:44, Clive D.W. Feather wrote:
In article ,

writes
What about in the reverse direction? You want the pan to come up while
in the transition area.

Nope, got to set the mode switch and manually raise them. Pans will also
not go up if any part of the train is on contact with the 3rd rail.

So what do you do at the equivalent of Drayton Park, where the train
comes to a stop on the 3rd rail but needs to start on the overhead
because the third rail ends 5 metres beyond the front of the stopped
train?

I was speaking about M-2s, and not about 313s. I assumed, in the latter
case, that there is a mode switch.


So you mean they won't go up automatically, not won't go up at all?


Exactly. The driver (engineer) switches the power mode, then hits the
"pan up" switch.

Because
if they won't go up at all when on 3rd rail you've got a problem, unless over
there they have to coast off the 3rd rail


They coast off the 3rd rail and then raise when completely under the
wire and moving. It's done on the fly, AIUI, to help the train quickly
assimilate the new power.

Not done here where OHLE and 3rd rail overlap or share a section of
track (Camden Bank). Changing on the move is a minority activity done
by cl.378s (only ?).

then hope the pan works because if
not then that'll be the whole line blocked with a dead train.


M2s and M8s are married pairs, coupled into a consist. Each of those
pairs has a pantograph, and they all go up. Thus, if one of them does
not work, the other ones will take over.

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Old December 21st 17, 11:27 PM posted to uk.railway,uk.transport.london
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Default Overhead wire in moorgate line stations

On 21.12.17 23:45, Charles Ellson wrote:
On Thu, 21 Dec 2017 13:33:34 +0000, "
wrote:

On 21.12.17 10:34, wrote:
On Thu, 21 Dec 2017 00:24:04 +0000
" wrote:
On 20.12.17 22:44, Clive D.W. Feather wrote:
In article ,

writes
What about in the reverse direction? You want the pan to come up while
in the transition area.

Nope, got to set the mode switch and manually raise them. Pans will also
not go up if any part of the train is on contact with the 3rd rail.

So what do you do at the equivalent of Drayton Park, where the train
comes to a stop on the 3rd rail but needs to start on the overhead
because the third rail ends 5 metres beyond the front of the stopped
train?

I was speaking about M-2s, and not about 313s. I assumed, in the latter
case, that there is a mode switch.

So you mean they won't go up automatically, not won't go up at all?


Exactly. The driver (engineer) switches the power mode, then hits the
"pan up" switch.

Because
if they won't go up at all when on 3rd rail you've got a problem, unless over
there they have to coast off the 3rd rail


They coast off the 3rd rail and then raise when completely under the
wire and moving. It's done on the fly, AIUI, to help the train quickly
assimilate the new power.

Not done here where OHLE and 3rd rail overlap or share a section of
track (Camden Bank).


Yes, I have seen that plenty of times, such as at City Thameslink,
Farringdon and Drayton Park.

Changing on the move is a minority activity done
by cl.378s (only ?).


Class 373s also changed over on the fly when they ran out of Waterloo, IIRC.
  #30   Report Post  
Old December 21st 17, 11:33 PM posted to uk.railway,uk.transport.london,nyc.transit
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Default Overhead wire in moorgate line stations

On 21.12.17 23:45, Charles Ellson wrote:
On Thu, 21 Dec 2017 13:33:34 +0000, "
wrote:

On 21.12.17 10:34, wrote:
On Thu, 21 Dec 2017 00:24:04 +0000
" wrote:
On 20.12.17 22:44, Clive D.W. Feather wrote:
In article ,

writes
What about in the reverse direction? You want the pan to come up while
in the transition area.

Nope, got to set the mode switch and manually raise them. Pans will also
not go up if any part of the train is on contact with the 3rd rail.

So what do you do at the equivalent of Drayton Park, where the train
comes to a stop on the 3rd rail but needs to start on the overhead
because the third rail ends 5 metres beyond the front of the stopped
train?

I was speaking about M-2s, and not about 313s. I assumed, in the latter
case, that there is a mode switch.

So you mean they won't go up automatically, not won't go up at all?


Exactly. The driver (engineer) switches the power mode, then hits the
"pan up" switch.

Because
if they won't go up at all when on 3rd rail you've got a problem, unless over
there they have to coast off the 3rd rail


They coast off the 3rd rail and then raise when completely under the
wire and moving. It's done on the fly, AIUI, to help the train quickly
assimilate the new power.

Not done here where OHLE and 3rd rail overlap or share a section of
track (Camden Bank). Changing on the move is a minority activity done
by cl.378s (only ?).


Changing over at V-Zero on an M-2 will mean a rough start, and is thus
ill-advised.

Are the M-2s still running, by the way? I know that the New Haven Line
EMUs are now mainly M-8, though I was under the impression that
Metro-North were keeping a few around for peak services.


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