Traction Siemens - Pneumatics Flashcards
What makes up the air supply unit
Air compressor
Air dryers
Compressors pressure switch
What are the pressures on the two safety valves in the air supply system
Comp and airdryers valve - 1100
Air dryers and MR 1050
What is the air compressor governor set to (to start compressor)
850kpa
What is MR operating pressure
850-1000kpa
If the pressure governor has been isolated will the air compressor run continuously?
Yes
What makes up the air suspension system (3)
Levelling valves
Air bags
Surge reservoirs
What does the levelling valve do
Inflates and deflates air bags according to loading
How many levelling valves on no.1 bogie T car
2
What us thr brake control system made up of (4)
Service
Holding
Emg
Park brake
What does service brake use
EP and ED
What speed does EP use
Up to 10km
What is holding brake pressure
110kpa
What is B1 pressure?
57kpa
Can the train roll if MC moved from 0 to B1/2/3?
Yes as they have less brake cylinder pressure than holding
When service brake apply, what two lights will flash?
Maintenance and general fault (not an issue)
How long must MC remain in 0 before moving handle to power to brake or vice versa?
1 second
Does SPB apply automatically when key is removed?
Yes
What pressure does MR need to fall below to apply SPB?
350
Where are park brake cylinders located?
Wheels 3 and 7 on all cars
What speed if park brake applied will safety loop deenergise?
5km
Train will default to EP if braking effort falls below what %
99%
What do the sanders work in conjunction with (2)
BCU and Wheel slip unit
What 4 things are fitted to each sand box
Padlock
Red LED (sand below 20%)
White manual test button
Sight glass
What temperature do the sander heaters activate
5⁰
What speed do sanders not operate below?
5km
How long do you press the sanding button for and how long do you ensure sand flows
1 and 1 second
