Underframe Equipment

Question 1

Where is the Whistle isolation cock located?

Answer 1

In the panel to the left of driver’s seat

Question 2

How is the trip operated?

Answer 2

Electrically

Question 3

How do you reset the trip?

Answer 3

Train at 0kmh

MCH from B6 to COAST

Question 4

What happens when the Trip is activated?

Answer 4

Trip Reset Switch will illuminate RED

Safety Loop Opens

Emergency Brakes apply

Question 5

What protects the Trip?

Where is it located?

Answer 5

A CB in the panel behind the fire extinguisher

Trip this CB to drive with Trip raised

Question 6

What is the Towing Unit used for? (4)

Answer 6

Charge the BP to 550kPa

Apply brakes

Apply emergency brakes

Read BP when being rescued

Question 7

How is the Towing Unit made active?

Answer 7

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

Question 8

What power supply does the Towing Unit run on?

Answer 8

110vDC

Question 9

How does the Towing Unit work?

Answer 9

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)

Question 10

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

Answer 10

Open

Only maintenance staff can isolate

Question 11

What happens if the Towing Unit fails?

Answer 11

Emergency brakes will apply

Question 12

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

Answer 12

Isolate it

Turn it

Question 13

What does towing cock do?

Answer 13

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

Prevents Comeng overcharging

Question 14

What happens to pressure gauges when towing cock is turned?

Answer 14

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

Question 15

What kind of coupler does Siemens have?

Answer 15

Dellner

Question 16

What does the rip cord do on the coupler?

Answer 16

Manual uncoupling

We don’t use

Question 17

What does the electrical coupler handle do?

Answer 17

Manual electrical uncoupling

We don’t use

Question 18

What are Brake Resistor Grids used for?

Answer 18

Dissipating heat from ED braking

Question 19

What does the Traction Inverter do?

Answer 19

Converts 1500vDC to Variable 3 Phase AC for Traction Motors

Question 20

What does the TCU do?

Answer 20

Processes signals from MCH and powers traction motors accordingly

Powers:
Power
ED brakes
Holding brakes

Question 21

What does the High Voltage Container have in it?

Answer 21

HSCBs
Ground Switch
BCU

Question 22

What does the BCU do?

Answer 22

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

Question 23

What does the Brake Module do?

Answer 23

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

Question 24

What does the air compressor do?

Answer 24

Generates air for braking and suspension systems

Question 25

What does the Compressor Pressure switch do?

Answer 25

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

Question 26

What happens when Compressor Pressure Switch is isolated?

Answer 26

The air compressor will run continuously

Question 27

What do the Static Inverters do?

Answer 27

Convert 1500vDC to 400vAC for. BATH

Question 28

What is in the Auxiliary Container?

Answer 28

Control equipment for SIVs and BCU for T-car

Question 29

What do the batteries power when the train is down?

Answer 29

Raising pantographs

Step lights

Desk light

Initialising start up systems