Underframe Equipment Flashcards

1
Q

Where is the Whistle isolation cock located?

A

In the panel to the left of driver’s seat

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2
Q

How is the trip operated?

A

Electrically

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3
Q

How do you reset the trip?

A

Train at 0kmh

MCH from B6 to COAST

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4
Q

What happens when the Trip is activated?

A

Trip Reset Switch will illuminate RED

Safety Loop Opens

Emergency Brakes apply

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5
Q

What protects the Trip?

Where is it located?

A

A CB in the panel behind the fire extinguisher

Trip this CB to drive with Trip raised

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6
Q

What is the Towing Unit used for? (4)

A

Charge the BP to 550kPa

Apply brakes

Apply emergency brakes

Read BP when being rescued

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7
Q

How is the Towing Unit made active?

A

Train must be in BP Mode with Key Switch in ‘I’

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8
Q

What power supply does the Towing Unit run on?

A

110vDC

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9
Q

How does the Towing Unit work?

A

It reads and writes to and from the BP during Non-Electrical train rescue

It READS electrical signal from BCH and converts it to a reduction in pneumatic pressure in the BP (towards the coupler)

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10
Q

What position is the MR to Towing Unit I.C. in for train rescue and normal operation of train?

A

Open

Only maintenance staff can isolate

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11
Q

What happens if the Towing Unit fails?

A

Emergency brakes will apply

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12
Q

What do you have to do to towing cock if rescuing?

A

Isolate it

Turn it

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13
Q

What does towing cock do?

A

Reduces main res pressure to 700kPa between Siemens and Comeng during rescue

Prevents Comeng overcharging

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14
Q

What happens to pressure gauges when towing cock is turned?

A

Local Main res will show reduced pressure of 700kPa

  • so normal to get a flashing uncouple light

Rest of the Siemens train will operate at normal pressure and show 850-1000kPa

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15
Q

What kind of coupler does Siemens have?

A

Dellner

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16
Q

What does the rip cord do on the coupler?

A

Manual uncoupling

We don’t use

17
Q

What does the electrical coupler handle do?

A

Manual electrical uncoupling

We don’t use

18
Q

What are Brake Resistor Grids used for?

A

Dissipating heat from ED braking

19
Q

What does the Traction Inverter do?

A

Converts 1500vDC to Variable 3 Phase AC for Traction Motors

20
Q

What does the TCU do?

A

Processes signals from MCH and powers traction motors accordingly

Powers:
Power
ED brakes
Holding brakes

21
Q

What does the High Voltage Container have in it?

A

HSCBs
Ground Switch
BCU

22
Q

What does the BCU do?

A

Sends electrical signals to Brake module 1 and 2 to apply and release brakes

23
Q

What does the Brake Module do?

A

Converts electrical signal from BCU to pneumatic pressure to apply and release friction brakes

24
Q

What does the air compressor do?

A

Generates air for braking and suspension systems

25
Q

What does the Compressor Pressure switch do?

A

Monitors the level of compressed air in Main a
Res. and starts/stops the air compressor when required

26
Q

What happens when Compressor Pressure Switch is isolated?

A

The air compressor will run continuously

27
Q

What do the Static Inverters do?

A

Convert 1500vDC to 400vAC for. BATH

28
Q

What is in the Auxiliary Container?

A

Control equipment for SIVs and BCU for T-car

29
Q

What do the batteries power when the train is down?

A

Raising pantographs

Step lights

Desk light

Initialising start up systems