DTG Class 455/8

[jon91]

Dovetail has recently released the Class 455/8 to complement its south London offering, whilst I've enjoyed using it something has been bugging this nerd.

On the 455/9 made by Thomson power could be reduced gradually but the DTG 455/8 seems to have the same power control system as the old Mk1 EMUs, in that to reduce power you have to shut off completely before reapplying.

Is this prototypical or have DTG got the ones and zeros mixed up?

 

[DY444]

Dovetail has recently released the Class 455/8 to complement its south London offering, whilst I've enjoyed using it something has been bugging this nerd.

On the 455/9 made by Thomson power could be reduced gradually but the DTG 455/8 seems to have the same power control system as the old Mk1 EMUs, in that to reduce power you have to shut off completely before reapplying.

Is this prototypical or have DTG got the ones and zeros mixed up?

I know this an old thread but it is prototypical. The 455/9 is wrong.

 

[networkse]

Actually, some 455/9s have thyristor control. But not all. If they had thyristor control there would be no 'pop' with the shut off of power.

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[jon91]

Cheers chaps, so it seems that both variants of the class 455 in TS are prototypical. I can't verify these things myself being stuck in Northernland and not having much chance to go to London.

 

[richa2002]

Actually, some 455/9s have thyristor control. But not all. If they had thyristor control there would be no 'pop' with the shut off of power.

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GTO chopper equipment was removed from those few /9s a long while ago. They have all been camshaft for years.

 

[DY444]

Actually, some 455/9s have thyristor control. But not all. If they had thyristor control there would be no 'pop' with the shut off of power.

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Not any more. It was changed out years ago.

 

[networkse]

Well, they still did in the SWT class 455 training video. About 19 years ago. Before refurbishment.

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