X'trap Traction Flashcards
What is the MR pressure?
750-900kpa
What pressure is the MR safety valve set at?
980kpa
What is the BP pressure during normal operation?
0kpa
What is the BP pressure during rescue operation?
550kpa
What is the holding brake pressure?
120kpa
What is the full service brake pressure?
190kpa
What is the emergency brake pressure?
210kpa
At what MR pressure will both compressors run?
<650kpa
At what MR pressure will the safety loop open during normal operation?
580kpa
At what BP pressure will the safety loop open during rescue operations?
300kpa
At what BP pressure will the safety loop close during rescue operations?
430kpa
At what MR pressure will the SPB apply?
<350kpa
At what BP pressure is traction power restored during rescue operations?
480kpa
How is each car of an X’trap labelled?
Mc - Tp - M
What key unlocks the cab doors?
V29P
What are the 3 levels of saloon lighting?
- normal
- half
- emergency
What are the 3 levels of cab lighting?
- off
- cab (fluoro)
- desk (spotlight)
Where is the pantograph located?
No. 2 end trailer car
What does HVAC stand for?
Heating, ventilation and air conditioning
What is the roof mounted equipment on a motor car?
- HVACs
- resistor grids
What is the roof mounted equipment on a trailer car?
- pantographs
- HVACs
- lightning arrestor
- 2 x HSCB
What are the 5 cocks in the auxiliary pneumatic panel?
- whistle
- uncoupling
- trip cock reset
- trip cock active
- auxiliary pneumatic panel
On the brake applied indicator lights, what does the red and green mean?
- red = friction brakes applied
- green = friction brakes released
What 2 ways can an X’trap be coupled to a comeng and siemens?
- pneumatically
- mechanically
Can you couple an x’trap electrically to other train types?
No
What is the primary suspension?
Rubber mounted springs
What is the secondary suspension?
Rubber mounted coil spring
What wheels are the wheel slide protection fitted to?
2, 4, 6, 8 all cars
What wheels are the SPB on?
1, 3, 7 motor cars only
What key is used to unlock the manual SPB release padlock?
AX key
What are the 3 locations that mcbs can be found?
- B side cabinet
- left of door 2 trailer cars
- electrical (E) box
What is located in the traction container?
- main switch
- TCU
- traction inverter
- line inductor
- traction cooling fan
What does the traction inverter do?
Converts 1500vDV to variable 3 phase AC for the traction motors
What is the purpose of the line inductor?
Keep a clean and consistent power supply to traction equipment
What wheels are the tacho speed sensor cables fitted to?
4 and 8 trailer cars only
What is located in the auxiliary container?
- 2 x SIVs
- battery charger
What does the static inverter do?
Comverts 1500vDC to 400vAC
What does the pneumatic supply system consist of?
- 2 x air compressors
- main reservoir
- compressor governor
- compressor governor isolating cock
- air dryer
What happens if you isolate the compressor governor?
Compressors will remain in whatever state they were in prior to isolating
What colours could the battery box be?
- silver
- orange
- yellow
What is the position of train system (POTS)?
System that uses GPS to track the location of trains
What are the 6 items of safety equipment found on all trains?
- red and green flags
- fire extinguisher
- first aid kit
- switch stick
- ATWs
- ETCJC
What is located in the electrical cupboard to the left of the drivers’ seat?
- various circuit breakers and controls
- air con unit control switch
- safety loop 110v supply switch
- door loop bypass and isolation lights
What are the 3 important mcbs located in the B side electrical cabinet in the drivers cab?
- 22Q6 -> multi unit relay
- 23Q1 -> safety loop positive power supply
- 23Q2 -> safety loop negative power supply
Where are the wheelchair ramps located?
Saloon doors 1 + 6
What are the 3 positions of the reverser?
- reverse
- neutral
- forward
What are the 4 positions of the master controller?
- power
- coast
- brake
- emergency brake
What is the speed threshold?
0.5km/h
What 4 things are linked to the speed threshold?
- release saloon doors
- uncouple button
- reset trip
- safety loop reset (train rescue due to BP reduction)
What are the 3 bypass switches on the left of the drivers panel?
- safety loop bypass
- auto vigilance bypass
- tacho bypass
When do the marker lights turn white?
Key in and on
What are the 3 positions of the safety loop bypass switch?
- normal
- test
- bypass
If the safety loop is bypassed, will there be any safety devices operating on the train?
No
When would you use the safety loop bypass switch?
When the safety loop is defective
What 3 things, when defective, is the auto vigilance bypass switch used for?
- hand pilot valve
- foot pilot valve
- trip cock device
What is the tacho bypass switch used for?
To operate the equipment linked to the speed threshold when the sensors have failed on Tacho
What is the door loop bypass used for?
Gain traction power when doors can’t be proven closed and locked (FDCL)
How often does the MAD button beep?
Every 30 seconds
What position must the master controller key be to stable the train?
In and on
Does the key need to be in and on in the centre cab when uncoupling?
Yes
What colour needles are on the duplex gauge for MR and BP pressure?
- MR -> red
- BP -> black
When is the only time BP will be charged on this train?
During train rescue
What are the 5 positions of the emergency mode switch?
1 - online holding brake inhibit
2 - normal
3 - rescued
4 - rescuing
5 - rescuing in propulsion
What position should the EMS switch be in during normal operation?
2
What are the 3 positions of the trip cock device switch?
- lower
- reset
- raised
Once the 1 more panto lowered light is illuminated when stabling, how long must you wait before removing the master controller key?
5 seconds
What is the minimum voltage needed on the voltmeter when starting up the train?
90 volts
What are the 3 positions of the VICERS key switch?
- operate
- isolate
- test
What doors are the internal DERs fitted to?
Doors 2 + 5 all cars
Where are the HVAC fault lights located?
A side, left of door 2
Where are the saloon door motor isolation switches located?
Left of each door
Where is the mcb panel in the trailer car saloon area located?
Left of door 2
Where is the pantograph manual/raise lower device located?
Right of door 4 trailer cars
What are the 6 mcbs in the saloon area mcb panel?
- tachy unit
- BCU
- panto 2
- panto 1
- aux inverter 2
- aux inverter 1
What are the 7 components of the high voltage circuit equipment?
- pantograph
- lightning arrestor
- 2 x HSCB
- line inductors
- traction inverter
- rheostatic brake resistor grids
- auxiliary inverter (SIV)
What power do the traction motors run on?
Variable 3 phase AC
What does the lightning arrestor do?
Protects 1500vDC circuits against over voltage
What does the HSCB do?
Protect the 1500vDC equipment from a short circuit/surge
What voltage does the battery charger supply?
110vDC
During normal running, does the 110vDC come from the batteries or the battery charger?
Battery charger
What are the 5 major components of the 400vAC system (BATHG)?
- battery charger
- air compressor
- traction cooling fans
- HVACs
- GPO
What will happen if 1 SIV fails?
- half air con
- 1 air compressor out
- full saloon lighting
- both traction cooling fans
- battery charger still running
What are the 3 distribution lines of the low voltage 110vDC system?
- permanent low voltage
- prepared low voltage
- prepared low voltage and cab operative
What 3 things does the permanent low voltage line supply to?
- panto electric motor
- step lights
- fluoro cab light
What does the prepared low voltage line enable power to?
- train remains prepared
- pantos remain raised
- settings of last cab in service memorised
- marker lights, doors, saloon lights retain whatever their last setting was
What does the prepared low voltage and cab operative line supply power to?
- panto operation
- status and fault indications
- traction control
- braking control
- door control
- safety loop
- comms
- emergency saloon lighting
- normal saloon lighting
What equipment runs off the 24vDC line?
- headlights (low beam)
- drivers seat
- marker lights
- speedo
- windscreen wiper/washer
- gauge lights
- battery voltmeter
- MAD
- cab spotlight
- CCTV
- brake indicator lights
What equipment runs off the 24vAC line?
- headlights (high beam)
- CCTV in saloon
For up to how long will the batteries power the train if there is a loss of overhead?
Up to 1 hour
What are the 6 components of the safety loop?
- monitoring pressure switch on BP pipe on trailer car
- monitoring pressure switch in MR pipe on trailer car
- emergency stop button
- vigilance devices
- trip
- master controller in emergency
What 10 things could cause the emergency brake to apply?
- MR <580kpa
- BP <300kpa during train rescue
- trip cock device activated/raised
- hand/foot pilot valve not set or emergency auto vigilance not pressed running on secondary circuit
- activation of VICERS
- loss of 110vDC supply
- master controller in emergency in manned cab
- ESB pressed in any cab
- multiple cabs active
- 23Q1 / 23Q2 mcbs trip in lead cab
What are the 4 steps for resetting the safety loop after the trip is activated?
- Speed <0.5km/h
- Stationary minimum 5 seconds
- Trip cock device to reset
- Trip activated light extinguishes when reset
What are the 2 positions of the safety loop 110v supply switch?
- normal
- rescue
For how long will the primary and secondary saloon doors on the lead car stay open for if the master controller key is removed?
10 minutes
How many times and at what intervals will the saloon doors attempt to close with the secondary release feature?
4 times at 3 second intervals
For how long will the beeping tone sound if the saloon doors fail to prove locked and closed?
60 seconds
What are the 3 switches located in the electrical cupboard to the left of the driver?
- door loop bypass
- air con control
- safety loop 110 supply switch
After how long does the emergency auto vigilance button flash, then apply the emergency brake if not acknowledged?
30 seconds, then 10 seconds
Where are the external DERs located on motor and trailer cars?
- motor -> doors 1, 2, 5, 6
- trailer -> doors 2 + 5
What will occur in the drivers cab when a DER is activated?
- FDCL
- CCTV camera activates where DER was activated
- red ANSW button flashes
- door emy handle activated light illuminates
What 2 things are task linked to the VICERS?
- master controller
- whistle
How long do you have to acknowledge VICERS once the button starts flashing?
5 seconds, then 5 seconds
How do you reset VICERS after an activation?
- speed 0km/h
- wait 10 seconds
- master controller into coast
- observe emergency brake applied light illuminated
- press VICERS acknowledge button
After how long will a PEI call timeout?
90 seconds
What will occur in the cab when someone presses the PEI?
- cab speaker switches on
- alert tone
- ANSW button flashes red
- CCTV activates after driver answers call
What will happen to the compressors if you isolate the compressor governor?
Remain in the state they were in prior to isolating
What is the purpose of the air dryer?
Remove moisture, debris and oil
What are the 4 braking systems used on the X’trap?
- service brake
- holding brake
- emergency brake
- SPB
What type of brakes are on the motor and trailer cars?
- motor -> tread and disc
- trailer -> only tread
At what speed does:
- ED braking drop out?
- brake blending occur?
- ED brake effective?
- 5km/h
- 5-10km/h
- > 5km/h
What are the 2 types of running brake test done on this train?
- low speed running brake test - service brake test
- running brake test - service brake test
From which 2 cabs must continuity be done with 2 drivers after attaching?
- lead motor
- trailing centre motor
What are the 4 causes of a FDCL?
- saloon door failing to prove locked and closed
- any fault within the door system and associated connections
- coupler fault after recently uncoupling
- DER being activated
What should you do if you get a FDCL between stations?
- slow down
- look at mirrors to see if anyone hanging out
- check DER light
- PA announcement
- stop at next platform regardless of timetable
If a train stops while there is a FDCL, will they be able to get traction power again?
No, unless door loop bypass switch is isolated
What are the 8 functionality tests performed when preparing an X’trap?
- brake
- emergency stop button
- emergency auto vigilance
- safety loop
- hand/foot pilot valve
- VICERS
- trip
- traction test (lead motor only)
When doing a pre-movement/revenue prep, what are the only 3 things you need to check in the full cab inspections before performing the funcionalities?
- fault status panel
- lamps test
- whistle test
What functionality tests don’t you need to do when doing a pre-movement/revenue prep?
- VICERS
- traction test
From which end do you perform the panto test on a prep?
Trailing motor
Within how long must the pantos lower when doing the panto test?
10 seconds
From which end do you perform the traction test?
Lead motor
For how long will the red tail lights and emergency saloon lights stay on for after stabling?
15 minutes
What variance is allowed in all pressures?
+/- 20kpa
What motor cars are first aid kits located?
Higher numbered motor car in each 3 car consist
What are the 4 positions of the door motor isolation switches?
- motor release
- motor isolate
- normal
- motor lock close
What are the 3 positions of the panto manual control and isolation switch?
- auto
- manual raising
- manual lowering and isolation
