Main Air System Flashcards
What air pressure Does the compressor supply the main reservoir at? What does it pass through to limit the pressure?
8.5 bar to 10 bar
Passes through a reducing valve to limit the air in the main res to 7 Bar
How is the compressor driven?
ELECTRICALLY
What happens and what should you do if you isolate the compressor governor?
The compressor will run continuously but will be restricted by a safety valve set at 10.7Bar.
Must be checked visually if isolated to check safety valve is working.
How is the compressor protected?
By a MCB in the TS MCB panel! If MCB is tripped compressor won’t run.
What isolation cock must be operated to allow another traction unit to be coupled to it in a event of a damaged pipe or rupture?
Main reservoir isolation cock.
Where is the air suspension supplied from?
It is supplied from main res pipe via ISO cocks
What does the variable load valve do?
It recognises the load inside the train and adjusts the brake pressures accordingly.
This is referred to as variable load braking.
If the air suspension is isolated on a individual vehicle or on the whole train then what brake application will be applied in all steps?
In all steps a full brake application will be applied.
This means variable load braking is not available on the vehicle.
When would there be a emergency brake application?
And then when would the brake release?
When main air gets below 6.2 Bar.
When air builds up to 6.7 bar.
When would there be a emergency brake application?
And then when would the brake release?
When main air gets below 6.2 Bar.
When air builds up to 6.7 bar.
