Comeng Faults - Control CB and MR Procedures Flashcards
If the control CB continues to trip when pulling for power, what is the procedure?
Reset CB and try at lower notches
If that fails try from another cab
If that fails you are disabled
When the traction overload reset trips the control CB, what is the first thing we need to ask ourselves?
Why did we push it
How do we locate what motor car is causing the CB to trip when we press traction overload reset?
By removing the local spring park brakes and sighting the fault lights this car and line switch and local fault lights
Once the car tripping the cb when we press traction overload reset is located what do we do?
Press the traction overload button
Confirm this is the faulty motor
Once the faulty motor has been found for the traction overload reset, what is the remedy?
Cut out the motors and local rheostatic brake
True or false, the reverser and D Wire are interconnected?
True
What is the procedure if the reverser trips in forward, neutral and reverse?
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
Can a train enter service if the train lined pantograph up button trips the control circuit breaker?
Yes, just raise all Pantographs and start MAs locally
Can a train be brought into service with a fault in the train lined pantograph buttons down tripping the control circuit breaker?
No unless the fault is found and isolated
How do we find and isolate the train lined pantograph down fault for the control circuit breaker?
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
How do we lower and isolate a local pantograph from the train lined pantograph buttons?
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
Once the local pantograph fault has been identified and isolated, what is the procedure?
Cut out the motors and local rheo
Can the train maintain main res pressure with a lead motor end cock broken off?
Yes due to the choke but it must be monitored
With a flexible hose rupture between cars, what is the procedure?
Close end cocks on affected car
No speed restrictions
What is the procedure for a main res tank rupture?
Close main res delivery cocks
Isolate compressor contractor
Release train lined spring park brakes
Isolate compressor governor CB
With a ruptured main res, will air still be supplied to all the pneumatics on that car?
Yes as the main res pipe is in tact and being fed from the other cars
If you can’t plug the automatic drain valve broken off, what is the procedure we revert too?
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
If a lead motor has a ruptured main res pipe, is a competent employee needed?
Yes as we need the competent employee to charge our brake pipe from another motor
If a lead motor has a ruptured main res pipe and it cannot be plugged, what is the procedure?
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
If a lead motor has a ruptured main res pipe, where does the driver power and brake from?
Lead motor but with BVIC closed as the air to charging valve will leak out of the rupture
If a lead motor has a ruptured main res pipe, what is the speed restriction?
15km/h due to emergency brake only and having the BVIC closed
If a other motor has a ruptured main res pipe, what is the speed restriction?
Half track speed to a maximum of 30 due to deflated air bags
If a rear motor has a ruptured main res pipe, is a competent employee needed?
No as driver is powering and braking from the lead and has a graduated brake due to open BVIC
If a other motor has a ruptured main res pipe, what is the full procedure?
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
If a trailer car has a ruptured main res pipe, what’s the procedure?
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
Why is the speed restriction half track speed to a maximum of 30 with a ruptured main res pipe in a trailer?
Because we lose airbags on top of doors and brakes
What is the procedure for a D wire tripping the circuit breaker?
Put the reverser to off Isolate the local rheo Trip ep circuit breaker Try forward neutral and reverse again If that fails Train disabled
