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Siemens Traction > Underframe > Flashcards

Underframe Flashcards

1
Q

What happens when the trip is activated? (3)

A

Trip reset switch illuminates red
Safety loop opens
Emergency brakes apply

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2
Q

How do you reset the trip after it has been activated? (3)

A

Stop train/0km
Turn reset switch to the right
Master handle into coast/0

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3
Q

Where is the iso cock for the whistle system

A

In a panel in cab left to the drivers seat

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4
Q

What does the towing unit do? (TU1)

A

Converts electrical signal to a pneumatic pressure and vice versa

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5
Q

What position must the towing cock be in all the time?

A

Open position

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6
Q

Towing unit modes

A

Read
Write

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7
Q

What does the towing cock do?

A

Reduces MR pressure when rescuing a Comeng to 700

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8
Q

Normal MR pressure in a Siemens?

A

850 - 1000 kpa

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9
Q

After turning the towing cock, what will flash throughout the whole train?

A

Uncouple light

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10
Q

Where are the padlocks for the park brake manual release?

A

Bogie 1 of a Motor car

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11
Q

What are brake resistor grids for?

A

ED braking, the dissipate the heat produced by ED brakes

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12
Q

What’s inside the traction container?

A

Traction inverter
Traction control unit (TCU)

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13
Q

What does the traction inverter do?

A

Converts 1500v DC to variable 3 phase AC for the traction motors

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14
Q

What does the TCU do? (2)

A
  • tells the traction motors to power and braking
  • Controls the operation of the holding brake
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15
Q

What is in the high voltage container?

A
  • RH side HSCB and ground switch
  • LH side brake control unit (BCU)
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16
Q

What does the BCU do?

A

Sends electrical signals to both brake modules to apply and release the brakes

17
Q

What does the brake module do?

A

Converts electrical signals from the BCU to pneumatic pressure to apply and release brakes

18
Q

What is inside the brake module?

A
  • air suspension system cock
  • bogie isolation cock
19
Q

What happens when the compressor pressure switch is isolated?

A

Compressor runs continuously

20
Q

What does the static inverter do?

A

Converts 1500v DC to 400v AC

21
Q

What are the batteries used for? (4)

A
  • raising the Panto
  • step lights
  • desk light
  • initialising systems for start up
22
Q

What does the Aux res supply?

A

Friction Brakes (EP)

23
Q

What do the Surge res supply?

A

Air for the airbags

24
Q

Where are the park brakes?

A

Wheels 3 and 7 of every motor and trailer

25
Q

Where are the disc brakes?

A

On each wheel of a M and T

26
Q

What brake is only on T cars

A

Disc

27
Q

What does the compressor pressure switch do?

A

Monitors comp air and starts and stops the compressor

Siemens Traction (9 decks)

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