Electrics Flashcards
How much kpa do you need in the MR to raise the pantos?
700
How do the pantos raise if there isn’t enough MR air? And does it raise all of them?
The auxiliary compressor on DMp cars local pantos only
After using the aux compressor, when will the other Panto raise and on which cars?
MR reaches 400-450 they raise on Mp cars
What does the high voltage box supply power to? (2)
Vehicle traction system
Aux power system
What does the HV box consist of? (2)
HSCB
Harmonic wave section device
What does the Harmonic Wave Detection Device do?
Safeguards against power quality problems from the overhead or the traction systems
Where is the auxiliary inverter?
In the aux power supply unit
What does the aux inverter do?
1500v DC to 415v AC to power BATH
For HCMT what does BATH stand for?
Battery charger
Main compressors
HVACs
Traction cooling system
Where are the traction inverter modules?
Inside the VVVF cabinet
What do the traction inverters do?
1500v DC to 3 phase variable
How long will the batteries power the train for?
2 hours
What does the battery charger do?
Converts 415v AC to 110v DC to charge the batteries and supply power to aux loads
During emy conditions and the batteries are powering equipment, what functions will be reduced?
Saloon lighting to 50% brightness after 10 mins
HVAC fresh air fan will work to 2 hours
Saloon doors will operate as normal
Circuit breakers that will cause the train to fail (4) BETC
Cab activation
Traction control
Emy brake loop power supply
Brake control supply
