Comeng Faults - Control CB and MR Procedures

Question 1

If the control CB continues to trip when pulling for power, what is the procedure?

Answer 1

Reset CB and try at lower notches
If that fails try from another cab
If that fails you are disabled

Question 2

When the traction overload reset trips the control CB, what is the first thing we need to ask ourselves?

Answer 2

Why did we push it

Question 3

How do we locate what motor car is causing the CB to trip when we press traction overload reset?

Answer 3

By removing the local spring park brakes and sighting the fault lights this car and line switch and local fault lights

Question 4

Once the car tripping the cb when we press traction overload reset is located what do we do?

Answer 4

Press the traction overload button

Confirm this is the faulty motor

Question 5

Once the faulty motor has been found for the traction overload reset, what is the remedy?

Answer 5

Cut out the motors and local rheostatic brake

Question 6

True or false, the reverser and D Wire are interconnected?

Answer 6

True

Question 7

What is the procedure if the reverser trips in forward, neutral and reverse?

Answer 7

Try for power
If it trips in forward neutral or reverse then it is the reverser
Reverser is not energised unless the master controller is activated

Question 8

Can a train enter service if the train lined pantograph up button trips the control circuit breaker?

Answer 8

Yes, just raise all Pantographs and start MAs locally

Question 9

Can a train be brought into service with a fault in the train lined pantograph buttons down tripping the control circuit breaker?

Answer 9

No unless the fault is found and isolated

Question 10

How do we find and isolate the train lined pantograph down fault for the control circuit breaker?

Answer 10

Lower and isolate each pantograph starting with the lead
Push the pantograph down button
If the control circuit breaker keeps tripping, continue down the train until you find the pantograph that is causing the fault

Question 11

How do we lower and isolate a local pantograph from the train lined pantograph buttons?

Answer 11

Local pantograph EP switch down
Turn the isolating cock in the van area
Flip the toggle switch for the pantograph to isolate
That local panto is now isolated from the train lined buttons

Question 12

Once the local pantograph fault has been identified and isolated, what is the procedure?

Answer 12

Cut out the motors and local rheo

Question 13

Can the train maintain main res pressure with a lead motor end cock broken off?

Answer 13

Yes due to the choke but it must be monitored

Question 14

With a flexible hose rupture between cars, what is the procedure?

Answer 14

Close end cocks on affected car

No speed restrictions

Question 15

What is the procedure for a main res tank rupture?

Answer 15

Close main res delivery cocks
Isolate compressor contractor
Release train lined spring park brakes
Isolate compressor governor CB

Question 16

With a ruptured main res, will air still be supplied to all the pneumatics on that car?

Answer 16

Yes as the main res pipe is in tact and being fed from the other cars

Question 17

If you can’t plug the automatic drain valve broken off, what is the procedure we revert too?

Answer 17

Blank the pipe so brake cylinders don’t bleed 
Ruptured main res tank
Isolate main res delivery
Isolate compressor contactor
Release spring park brake
Isolate compressor governor cb

Question 18

If a lead motor has a ruptured main res pipe, is a competent employee needed?

Answer 18

Yes as we need the competent employee to charge our brake pipe from another motor

Question 19

If a lead motor has a ruptured main res pipe and it cannot be plugged, what is the procedure?

Answer 19

Close main res cocks
Lower and isolate pantograph 
Isolate compressor governor CB
Cut out motors 
Isolate door loop bypass 
Manually release spring park brake 
Trip ep circuit breaker

Question 20

If a lead motor has a ruptured main res pipe, where does the driver power and brake from?

Answer 20

Lead motor but with BVIC closed as the air to charging valve will leak out of the rupture

Question 21

If a lead motor has a ruptured main res pipe, what is the speed restriction?

Answer 21

15km/h due to emergency brake only and having the BVIC closed

Question 22

If a other motor has a ruptured main res pipe, what is the speed restriction?

Answer 22

Half track speed to a maximum of 30 due to deflated air bags

Question 23

If a rear motor has a ruptured main res pipe, is a competent employee needed?

Answer 23

No as driver is powering and braking from the lead and has a graduated brake due to open BVIC

Question 24

If a other motor has a ruptured main res pipe, what is the full procedure?

Answer 24

Attempt to plug 
If unable close end cocks
Lower and isolate pantograph
Trip out compressor governor cb
Trip out EP circuit breaker
Cut motors out 
Isolate door loop bypass
Drive and power from front
No CE required
Half track speed to a maximum of 30 due to no air bags

Question 25

If a trailer car has a ruptured main res pipe, what’s the procedure?

Answer 25

Try to plug
If not close main res end cocks to that car
Trip EP circuit breaker
Isolate door loop bypass
Half track speed to a maximum of 30

Question 26

Why is the speed restriction half track speed to a maximum of 30 with a ruptured main res pipe in a trailer?

Answer 26

Because we lose airbags on top of doors and brakes

Question 27

What is the procedure for a D wire tripping the circuit breaker?

Answer 27

Put the reverser to off
Isolate the local rheo
Trip ep circuit breaker
Try forward neutral and reverse again
If that fails
Train disabled