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Author Topic: Great Western Main Line electrification - ongoing discussion  (Read 283594 times)
John R
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« Reply #45 on: July 27, 2017, 15:12:23 »

Did that from Penzance to London in 2001 to avoid a long journey with a 2 and 4 year old back to Bedfordshire. Very pleasant it was too.  Even ended up going through MKM» (Melksham (Station code) - next trains) if I recall due to a diversion.   
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lbraine
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« Reply #46 on: August 03, 2017, 07:23:25 »

Observation from this AMs run into PAD» (Paddington (London) - next trains).

The relief line wires are up and continuous between Didcot and Maidenhead. The Over-Head Line Equipment (OHLE) contractor must have pushed very hard to fill in the gaps between Reading and Maidenhead.

And when I say wires up - I do mean everything, not just the wires hanging from the dangly bits.

So with infrastructure in place (energised ?) Great Western Railway (GWR (Great Western Railway)) can commit to 385's taking over from Turbos, which can start the Big Cascade! Right ?

Edit: VickiS - Clarifying Acronyms
« Last Edit: May 21, 2021, 10:55:28 by VickiS » Logged
Rhydgaled
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« Reply #47 on: August 03, 2017, 09:06:14 »

Observation from this AMs run into PAD» (Paddington (London) - next trains).

The relief line wires are up and continuous between Didcot and Maidenhead. The OHLE contractor must have pushed very hard to fill in the gaps between Reading and Maidenhead.

And when I say wires up - I do mean everything, not just the wires hanging from the dangly bits.

So with infrastructure in place (energised ?) GWR (Great Western Railway) can commit to 385's taking over from Turbos, which can start the Big Cascade! Right ?
What about the main lines, are only the reliefs wired so far? And I don't think GWR have any plans to use 385s; I think the GWR EMUs (Electric Multiple Unit) are 387s aren't they?
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Don't DOO (Driver-Only Operation (that is, trains which operate without carrying a guard)) it, keep the guard (but it probably wouldn't be a bad idea if the driver unlocked the doors on arrival at calling points).
ChrisB
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« Reply #48 on: August 03, 2017, 09:16:06 »

I thought they'd been testing the 800s on the wires to DID» (Didcot Parkway - next trains) for a little while now, not just to MAI (Maidenhead station)?
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Rhydgaled
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« Reply #49 on: August 03, 2017, 09:28:47 »

I thought they'd been testing the 800s on the wires to DID» (Didcot Parkway - next trains) for a little while now, not just to MAI (Maidenhead station)?
Didcot to Reading was the 'test track' section for the class 800s, so that section has been wired for a while but when the PAD» (Paddington (London) - next trains) to Maindenhead EMU (Electric Multiple Unit) services started there was still a gap between Maindenhead and Reading that was not yet electrified. No idea if that is still the case, as I try to avoid London.
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Don't DOO (Driver-Only Operation (that is, trains which operate without carrying a guard)) it, keep the guard (but it probably wouldn't be a bad idea if the driver unlocked the doors on arrival at calling points).
ChrisB
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« Reply #50 on: August 03, 2017, 09:31:47 »

oh, ok, thanks for that
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stuving
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« Reply #51 on: August 03, 2017, 09:40:54 »

Observation from this AMs run into PAD» (Paddington (London) - next trains).

The relief line wires are up and continuous between Didcot and Maidenhead. The OHLE contractor must have pushed very hard to fill in the gaps between Reading and Maidenhead.

And when I say wires up - I do mean everything, not just the wires hanging from the dangly bits.

So with infrastructure in place (energised ?) GWR (Great Western Railway) can commit to 385's taking over from Turbos, which can start the Big Cascade! Right ?

Once the wires were all there through Reading, which was about a month ago, the straight bit to Maidenhead ought to be relatively quick. However, it's very hard to see if all the fiddly bits are in place - you'd need to know what's in the drawings. That's especially true at the east end of Reading station, where there is a lot of stuff. I guess there's a section break, plus all the isolation breaks for the points, but even then there's more stuff than is easy to explain.

To expand on that point about points: everywhere the line splits (e.g. between two platforms), or there's a crossover, there is a manual switch. That allows you to isolate any running line with a fault and use the others until such time as the line can be closed for a repair. Each isolation needs two or three extra short runs of wires (catenary and contact) and these need extra registration arms to keep then apart where they overlap. If you go onto platform 6 at Reading, past the ends of the through platforms, there's a forest of this switching stuff which certainly wasn't near complete last week.
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lbraine
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« Reply #52 on: August 03, 2017, 12:25:24 »

I can't comment on the main line - as the High Speed Train (HST (High Speed Train)) roof was blocking my view !

The turnouts and goods waiting lines all looked wired - and I did note some very large looking metallic throw switches mounted at points along the way - which I presumed were circuit breakers for one reason or another.

Clearly can't comment on whether they were all in-situ as required.

I did notice that several of the temporary sites used a long the line for equipment and material storage also looks empty of heavy metal, cables drums etc.

Maybe the contractors just cleaned up before going on their summer hols !!

Edit: VickiS - Clarifying Acronym
« Last Edit: May 21, 2021, 10:56:10 by VickiS » Logged
Adelante_CCT
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« Reply #53 on: August 03, 2017, 13:41:44 »

As discussed on another thread, switch on in the Reading area is 16/17th September, I assume a few weeks after that will see testing of 387s etc.
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Electric train
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« Reply #54 on: August 03, 2017, 22:14:41 »

Observation from this AMs run into PAD» (Paddington (London) - next trains).

The relief line wires are up and continuous between Didcot and Maidenhead. The OHLE contractor must have pushed very hard to fill in the gaps between Reading and Maidenhead.

And when I say wires up - I do mean everything, not just the wires hanging from the dangly bits.

So with infrastructure in place (energised ?) GWR (Great Western Railway) can commit to 385's taking over from Turbos, which can start the Big Cascade! Right ?

There are electrification system tests planned, part of this is the section proving around Reading.  Also the SCADA (System Control And Data Acquisition,) has to be reprogramed and tested to bring in the Auto Transformers, the GWEP (Great Western Electrification Program) electrification past Maidenhead uses a IEC61850 based electrical protection scheme which has to be commissioned and fully tested, its not an overnight test, this does need the Auto Transformer system between Kensal Green and Didcot to be complete.

The planned public timetable use is Jan 18 although ECS (Empty Coaching Stock) moves, test and drive training runs may well start before this 
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johnneyw
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« Reply #55 on: August 15, 2017, 20:11:09 »

I saw one of the new Hitachis pulling into Severn Tunnel Junction late this morning. First time I've seen one up close. Even in it's unliveried uniform grey it looked impressive. Almost felt I was on the continent.
« Last Edit: August 15, 2017, 22:02:09 by johnneyw » Logged
eightf48544
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« Reply #56 on: August 16, 2017, 08:09:11 »

Looks may  be deceptive.
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SandTEngineer
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« Reply #57 on: August 22, 2017, 14:41:29 »

Bristol - Cardiff Electrification contract re-award: http://www.railwaygazette.com/news/single-view/view/balfour-beatty-wins-bristol-cardiff-electrification-contract.html
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FremlinsMan
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« Reply #58 on: September 03, 2017, 17:50:11 »

This IET (Intercity Express Train) event sounds highly relevant - https://communities.theiet.org/communities/events/item/259/266/18217

Details at http://www.theiet.org/events/local/250178.cfm

Open to all (not just IET members) and free to attend, but need to register by September 21st.
 
===

Great Western Railway Electrification

Added by IET Event
0 Comments |
DESCRIPTION
Great Western Railway Electrification, a presentation by Darrel Tiddy.

More info
DATE & TIME
Thursday 28 September 2017 2:00 pm BST
END DATE & TIME
Thursday 28 September 2017 4:00 pm BST
ADDRESS
Swindon Training Centre
Whitehall Road South
Swindon, SN21FB
United Kingdom


About this event
Darrel Tiddy, Senior Asset Engineer will deliver presentation on the Great Western Electrification Project and the Overhead Line Equipment (OLE (Overhead Line Equipment, more often "OHLE")) being installed.  A close up view of the OLE being installed will be possible through an outdoor tour around the Electrification Training Centre.

Programme
13:45 - Event open
14:00 - Lecture starts
16:00 - Event close
Registration information
Registration is required to attend and closes at the end of 21st September 2017.

===
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TonyK
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« Reply #59 on: September 04, 2017, 00:38:30 »

Looks may  be deceptive.
Or not.

Time will tell.
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