Loss Of 1500vDC Power

Question 1

1500v DC equipment and circuits include? (5)

Answer 1

Pantos
MAs
Compressors
Traction equip
Associated circuits

Question 2

The overhead system will try and reset how many times? And then what?

Answer 2

Twice and then Electrol will reset it

Question 3

What happens to the saloon doors when overhead power is lost?

Answer 3

They release

Question 4

What happens if overhead power is unable to be restored?

Answer 4

Metrol will request trains in the section lower all pantos

Question 5

When the overhead has been repaired and reset what happens?

Answer 5

TC will depart trains at one minute intervals and you will have to run in series until the location TC has told you

Question 6

If there are no comms available, can you assume loss of overhead?

Answer 6

No

Question 7

How do you check for 110vdc

Answer 7

Bell
LP flag lowered EP brake operational
Supply light

Question 8

How do you check AC power?

Answer 8

Illumination of non emergency saloon lights
Can area cab light
Headlights

Question 9

If there are no comms how long do you have to wait to apply traction power? And what do you run in?

Answer 9

30sec up trains
60 sec down trains
Run in series to next station and advise TC

Question 10

What do you do if overhead is disarranged?

Answer 10

Stay in cab PA to tell people don’t get off the train

Question 11

How long do emy lights and PA operate for?

Answer 11

2 hours

Question 12

How do you know you need to reset the PA and emy lighting? And how do you do it?

Answer 12

Battery charger light will flash. Turn marker light switch from auto to something else then back to auto

Question 13

What is the LSM?

Answer 13

Loss of overhead shutdown module is designed to reduce the impact of 1500v defects from overloading the substation when power is returned

Question 14

What is the LSM speed threshold?

Answer 14

8kmh

Question 15

When overhead power is lost how long until VICERS expires and what happens?

Answer 15

5 minutes and the VICERS activation valve will open and dump BP air

Question 16

How do you locate the defective train?

Answer 16

TC will work with one train at a time and raise all pantos and start all MAs

Question 17

What will a weak substation cause? (4)

Answer 17

Reduced reactive effort
Reduced rheo brake performance
Loss of one or more air cons
Loss of one or more MAs

Question 18

If there is a weak substation output what must you do?

Answer 18

Drive in series until the next substation