Comeng Faults

Question 1

What does the train lined Control Circuit Breaker protect?

Answer 1

R - Control Circuit Reverser
C - Control Governor
M - Master Controller
P - Panto Raise / Lower
T - Traction Overload Reset
R - Rheostatic Brake

Question 2

What does the Auxiliary Control Circuit Breaker protect

Answer 2

B - Bell
A - Auxiliary start
D - Doors release and close
S - Saloon lights on and off
C - Couple and Uncouple
A - Air Con #1 control
R - Local Rheo brake
S - Scharfenburg self-centring

Question 3

What does the Local fault light indicate?

Answer 3

There’s a fault with the traction equipment. Can remain illuminated after isolating faulty equipment.

Question 4

What does the line switch fault light indicate?

Answer 4

There’s a fault condition on a motor car that prevents that motor from powering.

Question 5

What does the Rheo brake fault light indicate?

Answer 5

There’s a fault with the rheostatic braking.

Question 6

What does the ‘this car’ light indicate?

Answer 6

Indicates that the fault is on the that motor car.

Question 7

What does the control reservoir supply air to?

Answer 7

The trip latching lever and to operate equipment within the Main equipment and line breaker case. (490kpa +/- 20kpa)

Question 8

What’s the process if the control CB trips after using train lined Panto raise button?

Answer 8

Make sure the CB can reset

Locally raise all your panto’s

If the CB can’t be reset, there’s a fault between between Master controller and CB - don’t dock / train disabled

Question 9

If the control CB trips after:

Pushing remote Panto lower button

Answer 9

1. Reset the control CB
2. Electrically isolate the Panto EP valve
3. Manually lower and isolate the Panto

If it resets, fault is in the EP valve.

If not, repeat process in other motor cabs until faulty EP valve is found

If this process fails to isolate the fault, then the short circuit is in the train cable

Question 10

If the control CB trips after:

Pushing the traction overload reset button

Answer 10

Reset Control CB - can’t = disabled

Identify defective motor by using ‘this car’ light

Isolate the traction equipment by placing motors to all out

Submit TMM

Question 11

If the Control CB trips:

With the reverser in off
Master controller 0
Brake in release
Panto or traction button not pressed

Answer 11

Train can’t be powered with lead Master controller

Need a competent employee

Or rescued to clear the main lin

Question 12

If the Control CB trips:

With the reverser in Forward, Reverse, Neutral
Master controller 0
Brake in applied position (1-7)
Rheo in normal position

Answer 12

Fault in:
1. Short circuit between MC and Control CB

Or

2. Short circuit on the electric brake demand wire in the train cable

Or

3. Fault in the Rheo brake control equipment on any motor car

Rectify:

Switch local Rheo to isolate

Attempt to reset Control CB

If it resets, fault is on the local Rheo, train must proceed with the local Rheo isolated

If not:

Return Rheo switch to normal

Trip the ep CB

Reset the control CB
If remains set, run on the air
Submit a TMM

If it still doesn’t reset

Get a competent employee to power form another MC

Or be rescued to clear the section