Electrical Faults

Question 1

What do you advise passengers when there is loss of overhead power?

Answer 1

Period of delay

Any transfer to other train

Detraining arrangements

Any other arrangements

Question 2

How long does battery power last?

Answer 2

60 mins

Question 3

What do you do to conserve energy when there is loss of overhead?

Answer 3

Reverser NEUTRAL

Key to OFF

Headlights OFF

Daylight - cab lighting OFF

Daylight - saloon lighting EMERGENCY

ensure step lights OFF by closing cab doors

Question 4

What are the 3 CB faults?

Answer 4

MAJOR FAULT

MAJOR 2nd level fault

MINOR FAULT

Question 5

What is 24 V converter fault?

Answer 5

One or more has failed

If all 3 on unit lost - all 24v equip on that unit lost

Question 6

What does Low Pressure MR fault light mean?

Answer 6

MR has fallen below 650kPa

Train will fail when it falls to 580kPa

Question 7

What does Traction Fault light mean?

Answer 7

Traction Equip failed on this car

Question 8

What are the different voltages XTrap train use?

Answer 8

DC - 1500, 110, 24

AC - 400, 220, 24

Question 9

What is Safety Loop Negative power supply?

Answer 9

23Q2

Question 10

What is Safety Loop Positive power supply?

Answer 10

23Q1

Question 11

What is Multi-unit relay

Answer 11

22Q6

Question 12

What is BCU - low pressure in BP or service break CB?

Answer 12

25Q1

Question 13

What are the CBS in trailer saloon?

Where are they located?

Answer 13

To the left of door 2:

Tachy Unit
BCU
Panto 2
Panto 1
Aux. Inverter 2
Aux. inverter 1

Question 14

How many times can you attemp to reset an electrical fault/circuit breaker?

Answer 14

3

Question 15

What faults can be rectified by train stable? (13)

Answer 15

Air compressor
Battery charger
CCTV
DDU
DTRS
Failed Traction test
HVAC
PA
Safety Loop
Service brake (EP)
SIV
Speedo/Tacho
Traction

Question 16

If you have to stable on the mainline what do you have to do?

Answer 16

TEC call
PA
Close doors
Press Train Stable
Ensure HIGH VOLTAGE presence light extinguished
Wait 5 secs when Panto Down light illuminates
Remove key
Confirm Pantos lowered
Wait 2 mins
Test fault has cleared
Book FMP

Question 17

When an XTrap is stabled how long will emergency saloon and marker lights remain illuminated for?

Answer 17

15 minutes

Saloon doors will remain locked

Question 18

If step light is not illuminated what might be the cause? (4)

Answer 18

Defective

Storage batteries flat

Batteries isolated

Battery box fuse blown or missing

Question 19

If you have lost overhead do you still have HVAC?

Answer 19

No.

Question 20

What conditions should be met to perform a Train Stable on the Mainline?

Answer 20

At a platform

Under protection of Home signals

Not activating LVLX