HCMT Train Electric Flashcards
Where are the Pantos located?
No 1 end all motor cars
What is used to raise the Pantos
Electrical and pneumatic process
What pressure is needed to raise the pantoss
700 kpa
If MR pressure is not sufficient and panto raise button is pressed what happens
110v DC powers the auxiliary compressor to raise the local panto.
Once MR reaches 400-450 pantos on the Mp will raise
Where is the high voltage box located and name the 2 things inside
No 1 end all motor cars
HSCB
Harmonic wave detection device
What button is used the reset the HSCB is prompted
TCU/ACU rest button
What does the harmonic wave detection device do and can it be reset
Safeguards against power quality problems
Yes, TCU/ACU reset button
The electrical auxiliaries system converts 1500 vDC to what
3 phase 415 vAC
What 4 equipment runs on 415 vAC
Battery chargers
Air compressor
Traction Cooling system
HVAC - cab and saloon
The battery charger converts 415 vAC to what
110 vDC
What is in the variable voltage variable frequency cabinet and what does it convert 1500 vDC to?
Traction inverter
3 phase variable voltage and variable frequency
Where is the auxiliary power supply located and what 4 things is inside
Tc and DT cars
Auxiliary inverter
Medium voltage box
Battery box
Battery charger
The battery box supply what voltage and for how long
110 v DC
2h in emergency
The battery charger converts 3 phase 415 vDC to what
110 vDC
What runs on 240v AC
GPOs cab and saloon
In emergency conditions what 3 things will have a reduced function
Saloon lights will reduce to 50%
HVAC: fresh air fan operates with 110v DC battery power for 2 h
Saloon doors operate as normal
What happens with the HVAC when in train wash mode
Closes the fresh air damper and close fresh air fan
When power is lost what 3 things will the saloon HVACs do automatically
Open the fresh air dampers fully
Close the return air dampers
Fresh air fan operates on 110v DC for 2h
What happens when internal smoke detection happens
Internal smoke detectors relay signal to 2 HVAC
TMS display level 2 alert to driver and 15 sec timer starts
15 sec eTIS escalate to level 1 and initiate smoke mode
Upon internal smoke signal the HVAC shuts down and opens fresh air dampers
Internal fire doors close
What happens in the event of external smoke detection
2 external smoke detectors detected smoke, signal is sent to every HVAC to close fresh air dampers after 15 sec
Driver is alerted via eTIS
HVAC will automatically open fresh air damper once no smoke is detected
If the fresh air damper is closed for 10mins it will automatically open to allow fresh air
Name the 4 circuit breakers that will cause the train to fail
Cab activation
Traction control
Emergency brake loop power supply
Brake control supply
The emergency brakes will apply when:
(9 answers)
MC to Emy
Hand and foot pilot not set
EMS button
Trip activated
Vigilance penalty application
MR below 600 kpa
Towing unit demand for Emy brake
Safety system bypass reminder timeout
Physical interruption of the safety loop
The safety loop cannot be reset until
Stationary for 3 sec
Reason for Emy brake is reset
MC to max brake and reverse to neutral
