Class 20: Where Is The Dsd Fuse?

Discussion in 'TSW Troubleshooting & Issues Discussion' started by solicitr, Dec 9, 2025 at 1:00 AM.

  1. solicitr

    solicitr Well-Known Member

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    Using shift-enter opens and closes it, but I can't find it in the cab (this is the old Railfreight model from TVL, not the new DRS version)
     
  2. meridian#2659

    meridian#2659 Well-Known Member

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    Its not a fuse, search for the valve in the cab. (Also close all doors since there are some behind them)
     
  3. townsend_simon

    townsend_simon Member

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    Its out side of the loco next to the battery box, nose end driving desk side. Its a knife switch not a fuse.
     
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  4. meridian#2659

    meridian#2659 Well-Known Member

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    Thought DTG didnt model the exernal switch, instead i used the isolation valve inside the cab which is modeled as i remember.
     
  5. FredElliott

    FredElliott Well-Known Member

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    Don't mind me, just here with my relevant avatar
     
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  6. townsend_simon

    townsend_simon Member

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    sorry was being daft this morning for some reason i thought you said BIS but i think you mean the AWS change end switch which is down the side of the power controller meridian is quite correct.

    Screenshot 2025-12-09 173620.png

    the change end lever is to the right and the isolation lever is to the left.
     
  7. Shackamaxon

    Shackamaxon Well-Known Member

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    'It isn't modeled' - is the answer I got from the community when I asked the same question on this forum a couple of years ago. But given how detailed the model is... I still haven't abandoned my quest.

    That's the lightning isolation switch
    Screenshot (549).png

    The two interactables in the fuse cupboard -
    Screenshot (551).png

    Screenshot (550).png

    And yes, there is a control cutout switch and the AWS next to the control stand but still no luck with the DSD fuse/switch/lever :(
     
  8. tom#2834

    tom#2834 Well-Known Member

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  9. solicitr

    solicitr Well-Known Member

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    Oh, I know about those. I'm talking about the DSD (deadman) switch/fuse/valve
     
  10. Andy L

    Andy L Active Member

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    Take a look at this rather ancient EE handbook on the 20: Locomotive Repair Books, Record Cards, Manuals and Driver's Handbooks. There are two isolating cocks mentioned with locations shown but whether the locations changed as the locos were overhauled and fitted with train air brakes I don't know. I've not explored the TSW loco to see if they are modelled.
     
  11. DominusEdwardius

    DominusEdwardius Well-Known Member

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    There isn't one, its tethered to AWS being active. Its a simplification as the isolating handle isn't modelled which is outside under the cab I think.
     
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  12. Shackamaxon

    Shackamaxon Well-Known Member

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  13. meridian#2659

    meridian#2659 Well-Known Member

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  14. solicitr

    solicitr Well-Known Member

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    That's the emergency brake valve
     

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