Train Electrics

Question 1

The high voltage circuit and equipment comprises of what equipment? (7)

Answer 1

Panto
Lightning arrester
2 HSCB
line inductors
Traction inverter
Rheo brake resistor grids
SIVs

Question 2

How many traction motors?

Answer 2

4 on Mc

Question 3

What power do the traction motors use?

Answer 3

3 phase variable AC

Question 4

What does the TCU do?

Answer 4

Controls voltage into the traction motors

Question 5

The low voltage circuit comprises of what? (6)

Answer 5

Aux inverter
400/220vAC system
110vdc system
24 v ac/dc system
Batteries
Air con

Question 6

What do the SIVs produce?

Answer 6

400vAC

Question 7

The battery charger produces what to a max of what?

Answer 7

110vdc to 123.6 v dc

Question 8

What do the SIVs supply power to? (6)

Answer 8

400/220vAC system
110vdc system
Battery charger
Air con
Air compressors
Traction cooling fans

Question 9

What is connected to the 400vAC system? (4)BATH

Answer 9

Air compressors
HVACs
Traction cooling fans
Battery charger

Question 10

What is connected to the 220vAC system?

Answer 10

GPOs

Question 11

What happens if one SIV fails? (5)

Answer 11

Other SIV will power:
No.1 air con on each car
No.1 air compressor
Full saloon lighting
Both traction cooling fans
Battery charger

Question 12

What lines are in the low voltage 110vdc system (3)

Answer 12

Permanent low voltage
Prepared low voltage
Prepared low voltage and cab operative line

Question 13

What is connected to the permanent low voltage line? (Battery powered)

Answer 13

Panto electric motor
Step lights
Cab fluro light

Question 14

What is connected to the prepared low voltage and cab operative line (key in and on)

Answer 14

110vdc stuff and trainlined stuff like Pantos
Doors
Safety loop
Traction
Braking
Comms
Saloon lights

Question 15

Prepared low voltage line is connected to what? ( key comes out)

Answer 15

Service retention mode so
Pantos stay up
Markers lights saloon door and lights will remain in the settings before the key was removed

Question 16

24vDC supplies power to what?

Answer 16

Smaller things like
Seat
Marker lights
Speedo
Windscreen wiper washer
MAD
Brake indicator lights

Question 17

24v AC powers what? (2)

Answer 17

High beams
CCTV in saloon

Question 18

How long will the batteries power the train for?

Answer 18

One hour

Question 19

The safety loop comprises of what components? MEETV

Answer 19

ESB
Emy position
vigilance devices
Trip
The monitoring pressure switch in the MR and BP on the trailer

Question 20

The softy loop is protected by what CBs?

Answer 20

23Q1 safety loop positive
23Q2 negative

Question 21

If the safety loop de energises what will occur? (4)

Answer 21

Emy brake applies
Emy brake fault light
Data logger will record emy application
Inhibition of the electrical brake and traction

Question 22

Emy brake will apply when? (11)

Answer 22

MR below 580
BP below 300
Trip
Hand or foot not set
Auto vigilance not pressed
VICERS
Emy brake handle
ESB
Loss of 110vdc
23Q1 and/or 2 trip in lead
Multiple cabs active

Question 23

How do you reset the safety loop

Answer 23

Remove the cause of the emy brake application

Question 24

When the safety loop is bypassed can you make an emy brake application?

Answer 24

No

Question 25

How long do the saloon doors remain open for?

Answer 25

1 min

Question 26

How long will doors 1256 stay open for when the key is removed to assist a passenger?

Answer 26

10 mins

Question 27

How many times will the doors attempt to close?

Answer 27

4 times 3 sec intervals

Question 28

What does the door loop bypass do?

Answer 28

Allows traction with a FDCL

Question 29

If a DER is pulled what do you get in the cab? (4)

Answer 29

FDCL
CCTV will come up
Answer button will flash
Door emy handle activated status light

Question 30

If a DER is pulled while running will you still have traction power?

Answer 30

Yes

Question 31

How do you reset VICERS?

Answer 31

Stationary 10 sec
Coast
Push Vicers