West London Line best avoided

Discussion in 'UK Railway Discussion' started by 87015, 25 Nov 2011.

Thread Status:
Not open for further replies.
  1. 87015

    87015 Established Member

    Messages:
    4,091
    Joined:
    3 Mar 2006
    Location:
    GEML/WCML/SR
    1005 Stratford - Clapham has had an ADD activation in the Mitre Bridge area
    As a result 1007 S.Croydon - M.Keynes requested to set back from North Pole to Shepherds Bush, however the pantograph was not lowered and has come into contact with the A40 overbridge.

    I'd stay clear...!
     
  2. Registered users do not see these banners - join or log in today!

    Rail Forums

     
  3. bignosemac

    bignosemac Established Member

    Messages:
    4,803
    Joined:
    12 Oct 2009
    Wos ADD?
     
  4. notadriver

    notadriver Established Member

    Messages:
    3,192
    Joined:
    1 Oct 2010
    Automatic dropping device. It is meant to lower the pantograph if there is a defect with either it or contact wire of the overhead catenary.
     
  5. tsr

    tsr Established Member

    Messages:
    6,938
    Joined:
    15 Nov 2011
    Location:
    Between the parallel lines
    So hang on a second... one pantograph lowered when it shouldn't and one remained up when it should've dropped?

    No wonder London Overground was part-suspended. That's all fine now but Southern is only just getting back to normal on the affected stretch (this is what I gather from their website, at least). :|
     
  6. Anvil1984

    Anvil1984 Established Member

    Messages:
    1,140
    Joined:
    28 Aug 2010
    No it was two seaparate services, the pantagraph on the first train lowered, so the second train got told to go back but forgot to lower the pan and it whacked a bridge if i read that right
     
  7. Class377/5

    Class377/5 Established Member

    Messages:
    5,594
    Joined:
    19 Jun 2010
    The 377 are designed with a safety feature (well the 377/5's are) that won't drop the shoes until the pan is down or the other way.

    But it's happened a few times before where a unit has gone on DC power only to find the pan is still up and it's got ripped off at the first low bit (I remember an hour of delays while a 377/5 sat in Snow Hill).
     
  8. tsr

    tsr Established Member

    Messages:
    6,938
    Joined:
    15 Nov 2011
    Location:
    Between the parallel lines
    Sorry, I meant to imply that I understood it to be two different trains' pantos. Oops. I stand clarified. ;)
     
  9. ChrisCooper

    ChrisCooper Established Member

    Messages:
    1,787
    Joined:
    7 Sep 2005
    Location:
    Loughborough
    I thought ADDs worked if the pan went over height, e.g lost the contact wire, too to prevent that sort of thing.
     
  10. HSTEd

    HSTEd Established Member

    Messages:
    9,415
    Joined:
    14 Jul 2011
    Depends where the wire termination is I suppose, how close is the end of the line to the bridge? It coud even be anchored directly to the bridge.
     
  11. Pumbaa

    Pumbaa Established Member

    Messages:
    4,863
    Joined:
    19 Feb 2008
    It's a few metres in front of the bridge. Could have been a case of ADD not working properly on the 377.
     
Thread Status:
Not open for further replies.

Share This Page