General Flashcards
What are the initial checks undertaken when traction power cannot be obtained?
Trips, Switches, Gauges and Cocks
TRIPS
-trip is lowered and set
SWITCHES
-Switches are in their normal position
-Circuit breakers are in normal position
-Door closed button is activated
GAUGES
-Main res pressure within tolerance (585-725)
-Brake pipe air pressure within tolerance 550 (above 425)
-Control reservoir pressure within tolerance (above 490)
COCKS
-BVICS is open
-Red EC and Yellow TECHAV are in normal position
Ensure 110vDC by:
-LP flag is lowered, EP brake operational
-Bell operates
What does the ROBBDS test stand for?
R- Reverser
O- traction Overload reset
B- Brake pipe reduction
B- control governor Bypass
D- Door loop bypass
S- Second controller
Step 1 in ROBBDS test?
REVERSE
Check if train powers in reverse
If it does, it indicates a faulty reverser
Step 2 in ROBBDS test?
OVERLOAD RESET BUTTON
Press the Traction Overload Reset button
Will reset any overloaded or resettable equipment
If train powers, proceed and submit a TMM
Step 3 in ROBBDS test?
BRAKE PIPE REDUCTION
-Make a brake pipe reduction below 325 to open control gov
-Restore brake pipe to above 430 to close control gov
Try for power
If train powers, the control governor was faulty (debris most likely)
Proceed and book TMM
Step 4 in ROBBDS test?
CONTROL GOVERNOR BYPASS BUTTON
-Turn Red EC
-Set foot pilot valve and press control gov bypass button
If train powers, something on primary safety circuit was faulty
Step 5 in ROBBDS test?
DOOR LOOP BYPASS
-Isolate Door Loop Bypass switch and try for power
If power is obtained, fault is in traction inhibit system
Submit TMM and DETRAIN passengers at next opportunity
Step 6 in ROBBDS test?
SECOND CONTROLLER
-Try for power at rear cab
If train powers, can be powered from rear with competent employee
Or return to rear
If traction cannot be obtained, declare train disabled
What is a Local fault light usually to do with?
An overload
What is the Line Switch fault light usually to do with?
The Traction motors
What does a This Car illuminate light indicate?
-That one of the fault lights illuminated is for this motor car
-Park brakes are applied
What does the Control Reservoir do?
Gives traction power
What is the pressure of the Control Reservoir?
490kPa (+-20)
What is the result of a rupture in the Control Reservoir, or the relevant isolating cocks being isolated?
The switches will remain open and traction power will be unavailable on that car
If the Control Reservoir is ruptured or isolated, what must be done to gain traction power?
(Line switch fault light)
The Traction motor Cut out switch must be put to ‘All out’ and a TMM submitted
The Rheo brake on that car will then need to be isolated to resolve a ‘Rheo’ fault light (caused by the isolated traction motors)
If Traction motors are isolated (either all out, 1&2 or 3&4) what must be done after isolating them?
Press the Overload reset button before testing for power
Can a drive reinstate the Main Isolation Switch at any time?
No
If overhead is lost, what must be done?
-Stop train safely
-Check train is not derailed (if it is, check for fouled lines)
-Contact Train controller
-Secure the train
What is powered directly by 1500v DC?
-Pantographs
-Motor Alternators
-Compressors
-Traction equipment
-Associated circuits
When a loss of overhead occurs, how many times will the overhead system try to reset itself?
Twice
What happens to the doors if overhead power is lost?
They will release
If overhead power is lost and unable to be restored, metrol will make a group call instructing drivers to lower pantographs
What must a driver do?
-Observe the rear of the train confirming the trailing pantographs have lowered (lowered by LSM)
-Press the Local MA EP stop valve
-Press the Local Pantograph EP Stop valve
If overhead is lost, all trains have lowered their pantographs, and then power is restored, how will the train controller instruct drivers?
TC will deal with one train at a time, and depart them at one minute intervals
If a train fails and communication is unavailable, should the drive immediately assume a loss of overhead has occurred?
No, follow fault finding procedures
(Trip, Switches, Gauges, Cocks)