Electrical Faults

Question 1

What do you have to advise passengers of when there is a loss of overhead?

Answer 1

• how long the delay will be
• any arrangements for transfer to an assisting train
• detraining arrangements
  Any other necessary arrangements

Question 2

How long will the battery last for with all aux systems running?

Answer 2

60 minutes

Question 3

What are some ways to conserve the battery energy?

Answer 3

Reverser neutral
Key off
Headlights off
Cab light off
Use emy saloon lighting
Step lights off

Question 4

What does the major fault indicate?

Answer 4

A MCB has tripped somewhere on the train

Question 5

What does the major 2nd level fault indicate?

Answer 5

A MCB has tripped somewhere on the train

Question 6

What does a minor fault indicate?

Answer 6

A MCB has tripped that a driver cannot access

Question 7

What does aux fault indicate?

Answer 7

A SIV failure

Question 8

What does the battery charger fault indicate?

Answer 8

A battery charger has failed (can be linked to SIV failure)

Question 9

What does the 24 V converter fault indicate?

Answer 9

One or more 110vDC to 24vDC converters has failed

Question 10

What does the air compressor fault indicate?

Answer 10

One or more air comp failed

Question 11

What does low pressure in MRP indicate?

Answer 11

MR has fallen bellow 650

Question 12

What does low pressure in BP indicate?

Answer 12

BP has fallen below 430 during rescue procedures

Question 13

What does service brake fault indicate?

Answer 13

One or more faults in the service brake (ED brake)

Question 14

What does 1 or more brake equip fault indicate?

Answer 14

One or more brake equipment fault

Question 15

What does vigilance fault indicate?

Answer 15

VICERS system fault on this car

Question 16

What does traction fault indicate?

Answer 16

Traction equipment has failed on this car

Question 17

What does 1 or more traction equip fault indicate?

Answer 17

Traction fault somewhere on the train

Question 18

What does speed input fault indicate?

Answer 18

One or more speed sensors or tachometers has failed

Question 19

What does two HVAC stopped fault indicate?

Answer 19

Both air cons in one or more cars has failed

Question 20

What does one HVAC stopped fault indicate?

Answer 20

One air con in one or more cars has failed

Question 21

What does park brake applied fault indicate?

Answer 21

A SPB is applied somewhere on the train

Question 22

What are the different voltages in operation on the Xtrap?

Answer 22

1500vDC
110vDC
24vDC
400vAC
220vAC
24vAC

Question 23

What is the Safety loop negative power supply CB? And what fault light?

Answer 23

23Q2 major fault

Question 24

What is the Safety loop positive power supply CB? And what fault light?

Answer 24

23Q1 major fault

Question 25

What is the multiple unit relay CB? And what fault light would you get?

Answer 25

22Q6 major 2nd level fault

Question 26

What is the BCU CB? And what fault lights would you get?

Answer 26

25Q1 major fault, low pressure in BP or service brake

Question 27

Where are the trailer saloon MCB located?

Answer 27

Left of door 2

Question 28

What CB are in the trailer saloon? (6)

Answer 28

Tachy unit 32Q1 BCU 25Q1 Panto 2 22Q10 Panto 1 22Q5 Aux inverter 2 21Q9.2 Aux inverter 1 21Q9.1

Question 29

How many times can you try and reset a fault?

Answer 29

3 times

Question 30

What are some faults that may be rectified by doing a train stable? (13)

Answer 30

Battery charger faults CCTV Compressor DDU related faults Failed traction test Fixed train radio HVAC PA safety loop Service brake SIV traction Speed input/tachometer faults

Question 31

Stabling on the mainline procedure

Answer 31

TEC get permission to stable PA Close doors Train stable button High voltage presence light off 1 or more Panto down light on wait 5 sec Remove key Confirm pantos down Wait 2 mins Activate cab

Question 32

When an Xtrap is stabled, how long do marker lights and emy lights last for?

Answer 32

15mins

Question 33

If the step light is not illuminated what are the possible causes? (4)

Answer 33

- the light is defective - the storage batteries are flat - the batteries have been isolated - the battery box fuse is blown and/or missing

Question 34

If the battery switch is found to be on what can you assume about the batteries?

Answer 34

They are flat or the fuse has blown

Question 35

How long after raising the pantos will the high voltage presence light illuminate?

Answer 35

30 seconds

Question 36

If you start the train and the pantos haven’t risen what do you check?

Answer 36

Voltmeter

Question 37

If the pantos haven’t risen and there’s no voltage what do you check?

Answer 37

Position of the battery box iso switch. If isolated report if not declare disabled

Question 38

If the pantos haven’t risen and you have above 90 volts

Answer 38

Check the trailing Panto control buttons are not latched in. Try raise pantos from another cab

Question 39

If you have tried to raise the pantos from another cab and they don’t raise what do you do?

Answer 39

Check 3 way switch in trailer car Make sure Panto CB are set

Question 40

What are the position of the 3 way Panto switch?

Answer 40

Auto Manual raise Manual lowering and iso

Question 41

How do you isolate the Panto?

Answer 41

Stable train Make sure pantos have lowered Go to affected trailer Panto and switch to manual lower and iso Activate leading cab and raise other panto

Question 42

If you have to coast under something what do you need to do first?

Answer 42

Panto test

Question 43

When coasting under something what do you put the EMS to?

Answer 43

Position 1 online holding brake inhibit

Question 44

What happens if there are 2 keys in?

Answer 44

Emergency brakes

Question 45

You get in the train and activate the cab but you find that another cab is operative, what do you do?

Answer 45

-cab to cab - no response? check each cab for keys - no keys? Activate and deactivate each cab to see which one is the problem it may also help rectify the fault. - if none of that works train stable - if that doesn’t work then the train can only be driven from the active cab so you may need a C/E. No C/E = disabled

Question 46

Emy brake applied and won’t release, what do you check in the local cab? (11)

Answer 46

110vdc? (Cab fluro) Trip lowered and reset? ESB Emy position of master controller Hand or foot set? Vicers activated? EMS 2 MR above 580? Another cab operative? 23Q1 &2 set?

Question 47

Emy brake applied and not releasing what do you check in the other cabs?

Answer 47

ESB Trips raised?

Question 48

When using the safety loop bypass what else do you need to isolate?

Answer 48

VICERS

Question 49

What do you loose when you use the safety loop bypass? (7)

Answer 49

Emy position of master controller ESB Pilot valves Auto vigilance bypass button Trip Brake pipe pressure switch during train rescue MR pressure switch

Question 50

If you need to use the auto vigilance bypass switch what else do you need to isolate?

Answer 50

VICERS

Question 51

When would you need to use the auto vigilance bypass switch?

Answer 51

Hand or foot pilot valve defects

Question 52

When would you need to isolate VICERS? (4)

Answer 52

Fault indicator remains illuminated Safety loop bypassed Auto vigilance bypassed Abnormal operation of VICERS

Question 53

When the train is stabled how long will VICERS run on the internal battery for?

Answer 53

2 mins

Question 54

If you loose one SIV on one unit what happens?

Answer 54

The other SIV will take over The battery charger fault light may illuminate for 2 mins while they change over Air con will be halved on the affected 3 car unit One air comp will operate on the 3 car unit

Question 55

If you loose both SIVs on one unit what do you loose?

Answer 55

Battery charger Both air compressors Both traction cooling fans All HVACs

Question 56

How do you rectify SIV faults?

Answer 56

Reset the C/B or train stable

Question 57

What are the positions of the door motor iso switch?

Answer 57

Motor release Motor isolate Normal Motor lock and close

Question 58

To reset a DER which way do you turn the tri key?

Answer 58

Anti clockwise

Question 59

What does the TCU do if there is a problem with the traction or brake equipment?

Answer 59

Tries to rectify the fault if it can’t it will auto isolate the applicable equipment

Question 60

What are the indications of a traction fault? (4)

Answer 60

Traction fault light 1 or more traction equipment fault light No green leds on the power indicator Possible shuddering of the train while in motion

Question 61

How do you rectify a traction fault?

Answer 61

Train stable if time permits Activate each cab until you find the cab that has both traction fault lights and place traction iso switch to iso to remove the trainlined fault light

Question 62

How many 110vdc/24vDC converters do you need on a 6 car train?

Answer 62

Min 2

Question 63

How do you clear DTRS fault messages?

Answer 63

Press X

Question 64

How do you reset the DTRS?

Answer 64

Deactivate cab Trip and reset DTRS c/b Activate cab Enter TDN and do radio test TMM

Question 65

How do you isolate the DTRS and make the portable radio the main one

Answer 65

Deactivate cab Insert portable Trip DTRS c/b Reactivate cab TMM

Question 66

What do you do if you have no fault lights or status lights?

Answer 66

Lamps test