Question about TPE Class 350

[Bennski]

Travel on these a few times and one thing I have always noticed is the 2 large bangs that come from the toilet. Anyone know what they are caused by? Think the ScotRail 380 toilets do the same too...

 

[swt class 450]

It may be the sound of the flush possibly.

 

[Erniescooper]

It’s the sound of the Vacuum Circuit Breaker opening and closing as the the train passes through a overhead wiring neutral section

 

[Bletchleyite]

It’s the sound of the Vacuum Circuit Breaker opening and closing as the the train passes through a overhead wiring neutral section

Indeed, the pantograph is above the bog (note the lower ceiling in that area).

You also get it on /2 and /3 units, but oddly not on /1 where it's much quieter.

 

[AM9]

Indeed, the pantograph is above the bog (note the lower ceiling in that area).

You also get it on /2 and /3 units, but oddly not on /1 where it's much quieter.

As the /1s were originally fitted as ac/DC, maybe they were fitted with a different make or type of VCB not for any particular reason by as a coponent batch decision.

 

[37057]

Indeed, the pantograph is above the bog (note the lower ceiling in that area).

You also get it on /2 and /3 units, but oddly not on /1 where it's much quieter.

The difference in sound may be due to the fact that the /1s have an Alstom VCB fitted according to some notes. I assume the rest (the /4s I'm 100% certain) have one manufactured by 'Richard'.

Not sure who Richard is though!

The actuation of the switching is done by what's essentially a small Continental tyre rapidly deflating and inflating.

 

[route101]

It’s the sound of the Vacuum Circuit Breaker opening and closing as the the train passes through a overhead wiring neutral section

Is that same sound you get in a pendo?

 

[Bletchleyite]

Is that same sound you get in a pendo?

Yes, I believe it is.

 

[Elecman]

Is that same sound you get in a pendo?

Yes it is