I expect there is a simple answer to this one:
At Scrubs Lane on the West London Line the LO Class 387s do a supply change from 25kVA overhead power to 750v DC 3rd rail power (and the reverse). This is now done as a rolling change, ie the train does not stop.
Is there a technical reason why the Southern Class 378s couldn't do the same rolling power change? They currently stop for it seems like a minute or two.
I wonder if the Class 377s, also used on the line, are maybe a bit older in hardware so couldn't make the rolling change. I would have thought the 387s and 378s have a lot more in common.
Thanks!
At Scrubs Lane on the West London Line the LO Class 387s do a supply change from 25kVA overhead power to 750v DC 3rd rail power (and the reverse). This is now done as a rolling change, ie the train does not stop.
Is there a technical reason why the Southern Class 378s couldn't do the same rolling power change? They currently stop for it seems like a minute or two.
I wonder if the Class 377s, also used on the line, are maybe a bit older in hardware so couldn't make the rolling change. I would have thought the 387s and 378s have a lot more in common.
Thanks!