Xtrapolis - Electrics

Question 1

What is considered high voltage equipment?

Answer 1

Pantograph
Lightning arrestor
2 high speed circuit breakers
Traction converter
Auxillary inverter

Question 2

Where are the pantographs located and how are they activated?

Answer 2

2 end of a trailer car and automatically when the key is in the on position

Question 3

What is the job of the lightning arrestor?

Answer 3

Protect the train from the overhead from over voltage

Question 4

What does the high speed circuit breakers do?

Answer 4

Protect the overheads from the train

Question 5

What does the traction converter do?

Answer 5

Converts 1500vdc using 3 phase variable ac and distributes power to the traction motors dependent on the position of the master controller

Question 6

What is the components of the low voltage output?

Answer 6

Auxillary inverter
400/220 v ac system
110v dc system
24 v ac/dc system
Batteries
Air conditioning system

Question 7

What is connected to 400v ac?

Answer 7

Battery charger
Air compressors
Traction cooling fan
HVAC

Question 8

What happens if one siv fails?

Answer 8

No 1 air con works only
No 1 air compressor works only
Saloon lighting works
Both traction inverter cooling fans work

Question 9

What are the 3 110v distribution lines?

Answer 9

Permanent low voltage line
Prepared low voltage line
Prepared low voltage and cab operator line

Question 10

What is permanent low voltage line?

Answer 10

Originating from the batteries, it powers:
Pantograph electric motor
Step lights
Fluorescent cab light

Question 11

What is prepared low voltage and cab operative?

Answer 11

Master controller key is on and the panto is raised powering:
Pantographs
Status and fault lights
Traction control
Brake control
Door control
Safety loop
Comms
Saloon lights emergency and normal

Question 12

What does prepared low voltage line mean?

Answer 12

Master controller key is removed but pantograph, marker lights, doors and saloon lights stay in the settings they were before master controller key is removed (service retention)

Question 13

What is the low voltage 24v system running on DC?

Answer 13

That is the 24v system that runs things like 
Headlights (low beam)
Drivers seat
Speedo
Wiper washers
Gauge lights
Battery voltmeter 
Mad button
Cab spotlight
Cctv 
brake indicator lights

Question 14

What runs on 24v ac?

Answer 14

High beams

Cctv in passenger saloon area

Question 15

How long will the batteries power the train?

Answer 15

1 hour

Question 16

What powers the train during normal operation, batteries or battery charger?

Answer 16

Battery charger as it powers 110v system

Question 17

What de energises the safety loop?

Answer 17

Trip is set
Hand pilot valve set
Emergency stop button not pressed 
Vicers
Master controller in emergency
Key in another cab
Main res pressure drops below 580kpa
Brake pipe pressure drops below 300KPA 
Auto vigilance button times out
110v is energised
Circuit breakers 23Q1 23Q2

Question 18

What two positions does the safety loop rescue switch have?

Answer 18

Normal and rescue

Question 19

How long until a saloon door will close automatically?

Answer 19

1 minute

Question 20

What doors will remain open for a passenger with special needs and for how long?

Answer 20

Doors 1,2,5,6 and for 10 minutes

Question 21

How many times will a door attempt to close when there is an obstruction?

Answer 21

4 times at 3 second intervals

Question 22

What doors have an external release function?

Answer 22

Motor cars - 1,2,5,6

Trailer cars - 2 and 5

Question 23

What doors have internal emergency release?

Answer 23

Doors 2 and 5 on both motor and trailer cars beneath the DERs

Question 24

At what speed can’t the DER be operated?

Answer 24

5km/h

Question 25

If the DER is accessed, can we obtain traction power?

Answer 25

If already moving we can continue to do so, once stopped we will not be able to gain traction power unless der is reset

Question 26

For the speed threshold train lined, what functions don’t work unless we are beneath .5km

Answer 26

Uncouple button
Saloon doors
Resetting brake pipe after safety loop de energises (comeng train rescue)
Resetting trip

Question 27

How long do the red marker lights, cab lighting and emergency lighting stay on after stable?

Answer 27

15 minutes and then it turns off

Question 28

In what scenario would we turn emergency settings on the saloon lights?

Answer 28

To conserve battery power

Question 29

What circuit breakers de energise the safety loop?

Answer 29

23q1 and 23q2

Question 30

What circuit breaker would you trip to do functionalities in the centre cabs?

Answer 30

22q6

Question 31

What is the Job of the TCU?

Answer 31

To determine how much 3 phase power goes to the traction motors regarding load, speed and demand