Traction - X’Trap

Question 1

What are the 5 isolating cocks beside the drivers cab?

Answer 1

Horizontal:
- whistle
- uncoupling
- trip cock reset
Vertical:
- trip active
- auxiliary pneumatic panel

Question 2

Where are the brake indicator lights? What do the colours represent?

Answer 2

On the corner of every car, indicate if brakes are applied on the local bogie:
🟢 - friction brake released
🔴 - friction brake applied

Question 3

Where are the park brakes on an X’trap?

Answer 3

Wheels 1, 3, and 7 (motor car only)

Question 4

What is in the traction container?

Answer 4

Main switch
Traction Control Unit (TCU)
Traction inverter
Line Inductor
Traction Cooling fan

Question 5

What isolating cocks are on the brake rack?

Answer 5

Bogie 1& 2 isolating cocks
Auxiliary isolating cock

Question 6

Where are the pantographs located?

Answer 6

Number 2 end of the trailer car

Question 7

What items are in the A side equipment cabinet?

Answer 7

Track circuit jumper cables
Flags
First aid kit
VICERS whistle isolating cocks

Question 8

How do you access the X’Trap wheelchair ramp?

Answer 8

Cabinet next to doors 1 & 6
Opened via tri key (square)

Question 9

What are the positions of the master controller?

Answer 9

Emergency
Brake
Coast
Power

Question 10

What are the reverser positions in an X’Trap?

Answer 10

Reverse (pull towards)
Neutral (centre)
Forward (push away)

Question 11

What are the 3 sealed switches on the driving aid control panel?

Answer 11

Safety loop bypass switch
Auto vigilance bypass switch
Tacho bypass switch

Question 12

What does the tachometer control?

Answer 12

Controls the function of:
- door release
- uncouple button
- trip reset
- safety loop reset (no pressure during rescue scenarios)

All are operable when the train speed is below 0.5 km/h

Question 13

What are the BP pressures for the X’Trap?

Answer 13

0 kPa - normal operating pressure
During rescue:
300 kPa - safety loop opens
430 kPa - safety loop closes
480 kPa - traction available
550 kPa - fully charged

Question 14

What are the BC pressures for the X’Trap?

Answer 14

120 kPa - holding brake
190 kPa - full service EP
210 kPa - emergency

Question 15

What are the main res pressures of the X’Trap?

Answer 15

580 kPa - safety loop opens
650 kPa - 2nd compressor on (lowering), safety loop closes (rising); main res fault light (low pressure)
750-900 kPa - regular operating pressure
980 kPa - safety valve activates

Question 16

What equipment is part of the high voltage system?

Answer 16

Pantos
Lightning arrestor
2 HSCBs
Line inductors
Traction inverter
Brake resistor grids
SIVs (converts 1500v DC to 400v AC)

Question 17

What equipment is powered by the SIV 400v AC?

Answer 17

Battery charger
Air compressors
Traction cooling fans
HVACS

Question 18

What is the permanent low voltage line comprised of? What powers it?

Answer 18

Panto electric motor
Can step lights
Cab fluorescent light

Powered by the batteries

Question 19

What equipment is lost when a SIV fails?

Answer 19

1/2 AC (1 AC per car)
1 compressor

Question 20

What roof mounted equipment are on the motor car of an X’Trap?

Answer 20

Resistor grids
HVACs

Question 21

What roof mounted equipment is on the trailer car of an X’Trap?

Answer 21

Pantographs
HVACs
Lightning arrestor
2 HSCBs