Train GraphicClick on the map to explore geographics
 
I need help
FAQ
Emergency
About .
Travel & transport from BBC stories as at 02:55 03 Dec 2022
- Train strikes: RMT union hopeful of offer to end rail dispute
Read about the forum [here].
Register [here] - it's free.
What do I gain from registering? [here]
 30/03/23 - Railfuture Annual, Leeds

No 'On This Day' events reported for 3rd Dec

Train RunningCancelled
05:15 Penzance to Truro
05:20 Bristol Temple Meads to Exmouth
06:50 Penzance to St Ives
Short Run
07:25 Exmouth to Paignton
Delayed
00:32 London Paddington to Oxford
PollsThere are no open or recent polls
Abbreviation pageAcronymns and abbreviations
Stn ComparatorStation Comparator
Rail newsNews Now - live rail news feed
Site Style 1 2 3 4
Next departures • Bristol Temple MeadsBath SpaChippenhamSwindonDidcot ParkwayReadingLondon PaddingtonMelksham
Exeter St DavidsTauntonWestburyTrowbridgeBristol ParkwayCardiff CentralOxfordCheltenham SpaBirmingham New Street
December 03, 2022, 02:57:30 am *
Welcome, Guest. Please login or register.

Login with username, password and session length
Forgotten your username or password? - get a reminder
Most recently liked subjects
[95] "Just keep playing trains" - railways as mental health therapy...
[66] Growing Rail Revenue
[57] Why does Cholsey bridge have such a tall hump?
[56] Reopening Cullompton and Wellington stations (merged topic)
[53] Vivarail in financial difficulties
[49] Breakaway to East Anglia
News: the Great Western Coffee Shop ... keeping you up to date with travel around the South West
 
   Home   Help Search Calendar Login Register  
Pages: 1 ... 256 257 [258] 259 260 ... 263
  Print  
Author Topic: Infrastructure problems in Thames Valley causing disruption elsewhere - ongoing, since Oct 2014  (Read 1081750 times)
stuving
Transport Scholar
Hero Member
******
Posts: 6517


View Profile
« Reply #3855 on: September 21, 2022, 11:31:56 am »

Here's something I said two years ago, about one of these failures due to train/OLE (Overhead Line Equipment, more often "OHLE") interaction in France:
Quote
SNCF (Societe Nationale des Chemins de fer Francais - French National Railways) are saying (though this is subject to detailed investigation) that a catenary fault at Orthez damaged a pantograph, which in turn went on to damage 60 km of catenary (mainly at track switches). For that, it must have still been collecting current OK. After stopping at Morcenx, the train did restart and got 50 km further to Ychoux, before its complete failure. Apparently, two following trains also suffered some of this mutual damage effect. 

However, that train didn't go through Orthez, so there was more work to do then tracing the chain of events back. That was 1500V DC (Direct Current) OLE, which is chunkier, but still relies on the top of the pan sliding smoothly along the contact wire at all times.
Logged
TaplowGreen
Transport Scholar
Hero Member
******
Posts: 6639



View Profile
« Reply #3856 on: September 21, 2022, 01:34:03 pm »

Cancellations to services between London Paddington and Reading

Due to damage to the overhead electric wires between London Paddington and Reading some lines towards Reading are blocked.

Train services running to and from these stations may be cancelled, delayed or revised.

 D
isruption expected until 12:00


Now pushed out to 1500
Logged
TonyK
Global Moderator
Hero Member
*****
Posts: 6162


The artist formerly known as Four Track, Now!


View Profile
« Reply #3857 on: September 21, 2022, 08:18:40 pm »

Thankfully, all was back to a semblance of normal by 1704, when I caught the Penzance train to TVP. Even the WiFi worked sporadically.
Logged

Now, please!
nickswift99
Full Member
***
Posts: 93


View Profile
« Reply #3858 on: September 23, 2022, 05:18:57 pm »

Seeing reports of wires down at Hanwell.

Good luck to anyone trying to get home this evening in what has been a miserable week.
Logged
charles_uk
Transport Scholar
Hero Member
******
Posts: 632

thewalkingpage
View Profile
« Reply #3859 on: September 23, 2022, 05:21:23 pm »

As just mentioned but a bit more from JourneyCheck

Quote
Delays to services between London Paddington and Slough

Due to damage to the overhead electric wires between London Paddington and Slough all lines are blocked.

Train services running to and from these stations may be delayed. Disruption is expected until 18:00 23/09.

Additional Information
Overhead Wires
Electric trains get their power from electrical rails on the ground or overhead wires. The power supply to both of these can fail due to a number of factors.

Not much seems to be moving out at Paddington at the moment
Logged
Trowres
Transport Scholar
Hero Member
******
Posts: 673


View Profile
« Reply #3860 on: September 23, 2022, 05:54:59 pm »

2P60 from Didcot appears to have reached Southall on up relief and been cancelled thereafter. Now (1753) running ECS (Empty Coaching Stock) "wrong line" (though a signalled move) to be dumped in P5 at Hayes & Harlington.

Not sure if this is the epicentre of the incident. Traffic seems to be moving on the main lines.
Logged
Electric train
Transport Scholar
Hero Member
******
Posts: 3921


The future is 25000 Volts AC 750V DC has its place


View Profile
« Reply #3861 on: September 23, 2022, 05:58:57 pm »

Whether it was infrastructure or train caused the initial damage on Monday, the damaged pantograph involved looks like has cause damage elsewhere
Logged

Neither a wise man nor a brave man lies down on the tracks of history to wait for the train of the future to run over him.     
Dwight D. Eisenhower
JayMac
Data Manager
Hero Member
******
Posts: 18287



View Profile
« Reply #3862 on: September 23, 2022, 05:59:39 pm »

9P57 1631 Heathrow T5 - Paddington (Class 345 Liz Line service) had an ADD (Automatic Dropping Device) activation near Hanwell Station on the up relief. Driver reported OLE (Overhead Line Equipment, more often "OHLE") damage. Initially all lines were blocked after the OLE in the area tripped.

Up and down main reopened fairly quickly. Bit there is already significant disruption with delays and short notice cancellations due to having only the main lines available for the evening peak.

EDIT: Down relief reopened too.
« Last Edit: September 23, 2022, 06:10:55 pm by JayMac » Logged

#NotMyKing
JayMac
Data Manager
Hero Member
******
Posts: 18287



View Profile
« Reply #3863 on: September 23, 2022, 06:08:05 pm »

Whether it was infrastructure or train caused the initial damage on Monday, the damaged pantograph involved looks like has cause damage elsewhere

Have all three incidents occured on the up relief? Or is there a suggestion that one errant set has been out and about damaging OLE (Overhead Line Equipment, more often "OHLE") wherever it goes, but continuing in service because it's not been identified as the culprit?
Logged

#NotMyKing
stuving
Transport Scholar
Hero Member
******
Posts: 6517


View Profile
« Reply #3864 on: September 23, 2022, 06:26:20 pm »

Whether it was infrastructure or train caused the initial damage on Monday, the damaged pantograph involved looks like has cause damage elsewhere

Have all three incidents occured on the up relief? Or is there a suggestion that one errant set has been out and about damaging OLE (Overhead Line Equipment, more often "OHLE") wherever it goes, but continuing in service because it's not been identified as the culprit?

I imagine it's easy to say that might be true, but very hard to prove it and even harder to disprove it. There may well be a load of people in NR» (Network Rail - home page) Towers staring at screens as hour after hour of pantograph monitor videos run through, mind-numbingly, trying to spot the earliest instance of pan damaging wire or vice versa.
Logged
JayMac
Data Manager
Hero Member
******
Posts: 18287



View Profile
« Reply #3865 on: September 23, 2022, 06:32:16 pm »

Monday's and today's incidents involved Class 345s. I wonder if that's just coincidence...
Logged

#NotMyKing
TaplowGreen
Transport Scholar
Hero Member
******
Posts: 6639



View Profile
« Reply #3866 on: September 23, 2022, 07:09:21 pm »

Depressingly,  but predictably......disruption until the end of the day.

Cancellations to services between London Paddington and Reading

Due to damage to the overhead electric wires between London Paddington and Reading some lines towards London Paddington are blocked.
Train services running to and from these stations may be cancelled, delayed by up to 90 minutes or revised.

Disruption is expected until the end of the day.
Logged
Electric train
Transport Scholar
Hero Member
******
Posts: 3921


The future is 25000 Volts AC 750V DC has its place


View Profile
« Reply #3867 on: September 23, 2022, 09:02:46 pm »

Whether it was infrastructure or train caused the initial damage on Monday, the damaged pantograph involved looks like has cause damage elsewhere

Have all three incidents occured on the up relief? Or is there a suggestion that one errant set has been out and about damaging OLE (Overhead Line Equipment, more often "OHLE") wherever it goes, but continuing in service because it's not been identified as the culprit?

I don't know if all were on the same line.  Although I am not a contact systems engineer (I'm a power distribution engineer) I've been around the knitting long enough to understand a few of the problems encountered after an OLE head span de-wirement.   It is not unknown for there to be issues for several days in an area after the type of incident on Monday, a headspan can sometimes fail on a different road to the original in a different location because of forces applied to the wire by a damaged pan can find a weakness.

Headspan construction allowed British Rail to cost effectively electrify the WCML (West Coast Main Line) north of Weaver Jcn to Scotland, the ECML (East Coast Main Line), BedPan, etc.  Pre privatisation BR (British Rail(ways)) had the manpower, equipment and track access to maintain headspan

Its posible there is a rouge 345 that has a suspension or Pan problem, another could be something as daft as a software update on the 345 that has altered the suspension characteristics.

There will be senior NR» (Network Rail - home page) Region and TOC (Train Operating Company) engineers looking at all the posible causes ................... mean time the finance and contracts folks will be claiming and counter claiming
Logged

Neither a wise man nor a brave man lies down on the tracks of history to wait for the train of the future to run over him.     
Dwight D. Eisenhower
onthecushions
Transport Scholar
Hero Member
******
Posts: 955


View Profile
« Reply #3868 on: September 23, 2022, 09:13:37 pm »

Quote from: Electric train link=topic=14689.msg326099#msg326099
  Pre privatisation BR (British Rail(ways)) had the manpower, equipment and track access to maintain headspan

I think that this may be the core of the problem. I remember reading an article by an OLE (Overhead Line Equipment, more often "OHLE") maintenance engineer about trying to maintain a main line OLE with a privatised Infrastructure Maintenance Unit, now stripped of its skilled staff, and the consequent frequent avoidable failures.

That's probably why our latest OLE designs are designed for low maintenance.

Headspans could work reasonably if in good hands.

OTC
« Last Edit: September 24, 2022, 05:13:42 am by onthecushions » Logged
Ollie
Data Manager
Hero Member
******
Posts: 2290


View Profile
« Reply #3869 on: September 24, 2022, 02:13:23 am »

Whether it was infrastructure or train caused the initial damage on Monday, the damaged pantograph involved looks like has cause damage elsewhere

Have all three incidents occured on the up relief? Or is there a suggestion that one errant set has been out and about damaging OLE (Overhead Line Equipment, more often "OHLE") wherever it goes, but continuing in service because it's not been identified as the culprit?

No.
If the speculation is correct in that it was the 345 on Monday, then it was on the Down Relief, although other adjacent lines had damage.
Wednesday was the Down Main and then tonight was the Up Relief.
Logged
Do you have something you would like to add to this thread, or would you like to raise a new question at the Coffee Shop? Please [register] (it is free) if you have not done so before, or login (at the top of this page) if you already have an account - we would love to read what you have to say!

You can find out more about how this forum works [here] - that will link you to a copy of the forum agreement that you can read before you join, and tell you very much more about how we operate. We are an independent forum, provided and run by customers of Great Western Railway, for customers of Great Western Railway and we welcome railway professionals as members too, in either a personal or official capacity. Views expressed in posts are not necessarily the views of the operators of the forum.

As well as posting messages onto existing threads, and starting new subjects, members can communicate with each other through personal messages if they wish. And once members have made a certain number of posts, they will automatically be admitted to the "frequent posters club", where subjects not-for-public-domain are discussed; anything from the occasional rant to meetups we may be having ...

 
Pages: 1 ... 256 257 [258] 259 260 ... 263
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.2 | SMF © 2006-2007, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
This forum is provided by a customer of Great Western Railway (formerly First Great Western), and the views expressed are those of the individual posters concerned. Visit www.gwr.com for the official Great Western Railway website. Please contact the administrators of this site if you feel that the content provided by one of our posters contravenes our posting rules (email link). Forum hosted by Well House Consultants

Jump to top of pageJump to Forum Home Page