Class 91 Pan up locations

[trv100]

Does anyone know of any places to watch or a video of a a 91 putting its Pantograph up + circuit breaker close? except the 0440 from York.

 

[dan4291]

See this video:

At the time of filming high speed coasting was in place due to damaged overhead wires so you see electric trains coasting through Biggleswade station with pantograph down before raising it just north of the station.

 

[D365]

An eerily quiet 91!

 

[jh64]

Maybe a daft question, but how does the train retain power for the lights, heating, etc. A generator or on-board batteries?

 

[jfollows]

Maybe a daft question, but how does the train retain power for the lights, heating, etc. A generator or on-board batteries?

Coach batteries with, I believe, a static inverter to drive the AC power.

 

[43096]

Coach batteries with, I believe, a static inverter to drive the AC power.

Coach batteries will only power the lights and other auxiliary circuits. They can't power the HVAC systems.

 

[jfollows]

Coach batteries will only power the lights and other auxiliary circuits. They can't power the HVAC systems.

Which is why the air conditioning cuts out through a neutral section, and then restarts after a "slightly random" delay once power returns to enable each coach to restart at a separate time, I think.

 

[trv100]

there have been times in summer where for the 91 cant supply ETS (usually overheated) and coach batteries cant be used for whatever reason meaning the coaches become dark and effectively a greenhouse, probably worst 2 hours of my life with temperatures getting up to 45C

 

[gabrielhj07]

there have been times in summer where for the 91 cant supply ETS (usually overheated) and coach batteries cant be used for whatever reason meaning the coaches become dark and effectively a greenhouse, probably worst 2 hours of my life with temperatures getting up to 45C

How long would a train be allowed to run in service for with defective ETS?

 

[trv100]

i dont think there's specifically a limit although on a hot day like that, it seems obvious that TOCs arent going to let a train run whilst the passengers have to endure 50 degree heat, in most cases the train will be taken out of service as soon as they can.