Siemens Faults - Electrics Flashcards
What happens to the train when it is stabled?
All marker and saloon lights are extinguished
PA is inoperative
Saloon doors lock
What three kinds of faults can be rectified via train stable?
Totally disabled
Critical faults
Serious or maintenance faults
What three locations are train stable procedures deemed appropriate?
Platforms
Under protection of home signals
Where level crossing protection devices won’t remain active
Before stabling a train for fault rectification, what must a driver do?
PA advising of the lights going out and doors locked for a short period of time Close doors Remove key Stable Confirm pantos have lowered Wait 2 minutes Reactivate Raise pantos
What must be done when a general fault light starts flashing and why?
Fault acknowledge to ensure the flashing stops and a driver can see if another fault arises
What 3 faults can a critical fault light indicate?
2 SIVS failed
Defective sanding equipment
Fault in pneumatic friction brake
If a train can be moved with a critical fault, what is the procedure?
Operate at low speed
De train at station
Shunt to nearest siding
If a critical fault occurs and driver cannot move the train, what circuit breakers need to be inspected?
Friction braking and monitoring in affected cars
Static inverter monitoring in trailer car
Can a train be safely operated with a maintenance fault?
Yes
What does the reduced performance fault light mean?
One or more motor cars are failing to power
Wheel slip is occurring
What other fault light will appear with a reduced performance fault light to indicate that car has failed traction equipment?
Traction system fault light
Can a driver reset a traction lock once the TCU attempts to reset the system?
No the reset is done by itself but a driver can move the handle to coast to clear the fault
What percentage of tractive effort is needed to remain in service?
50%
How does a driver reset slip and slide device?
Coast for 2 seconds
If the driver suspects another key is being inserted to another cab, what is their duties?
Check for cleaners key
Try a cab to cab call
Inspect each cab for cleaners keys or another key
If the active cab is located but no key or cleaners key is found, what could be the remedy?
Cab/train manned CB
What circuit breakers are reset to rectify a cctv fault?
Cctv central control
DC-DC inverter pa, Pi display
How do you reset a DTRS?
Deactivate cab Trip and reset DTRS cb Activate Re enter is tdn in unit of DTRS Conduct radio test
True or false, if no PA system is operational, the train must be taken out of service?
True
How long must a train be stabled for fault rectification for a PA system?
2 minutes
If pantos fail to raise, what cb need to be checked and in what cars?
Check pantograph control cb in local driving cab
Check pantograph motor in affected driving cab
If pantos fail to raise and cb is set, what must a driver do?
Trip and Reset panto control cb and press pantos up
If this fails either raise from another cab or trip panto motor and manually raise the lead
Press pantos up and ensure they drop with the pantos down command before entering service
If all pantos fail to raise due to low battery or faulty circuit, what must be done?
Check if they raise from elsewhere If not stable the train from lead for one minute Trip panto motor cb Raise the lead panto manually Press panto up button Reset panto motor cb
What CB needs to be checked when pantos fail to lower when train stabled is pressed?
Train stable, HSCB and light control
Shutdown delay in T car
TCU
How do you isolate individual pantos?
Key off Train stabled Trip panto motor and panto control cb in affected motor Lower defective panto vis crank handle if required Set panto control cb Key to on Press panto up Ensure it stays down
If both SIVS fail, what equipment is affected?
Air con Only emergency lighting Battery charger won’t charge batteries Half drivers cab fluro lighting Air compressor fails
At what battery voltage will the SIVS fail to start?
82v
How do we start the SIVS manually?
Key off Train stabled Trip panto motor cb Raise panto manually Go to SIVS on A side of train Unlock and press excite button Return to cab and activate cab Push pantograph raise Reset panto motor cb
If a door remains open, what is the procedure?
Open panel to left of door and press the button labelled button If that fails trip cb Close doors manually Manually isolate via triangle keyswitch Reset cb
If a trip has failed, what may need to be isolated?
Trip cock bypass
When running on secondary safety circuit, what button is pressed at regular intervals?
MAD button
If a fire happens in the train, what must be turned off?
HVAC
Name the circuit breakers that de energise the safety loop?
Safety Loop Auto coupler Friction brake and monitoring Emergency brake valves Cab manned Door controller train lined
How often will the MAD button make an audible tone on the secondary safety circuit?
45 seconds
Brakes apply 10 seconds later
What are the steps when stationary to rectify safety loop faults?
Master Controller Key switch Main res below 600 (if above 600 go to step 6) Emergency stop indicator illuminated VICERS fault light or activation Over speed indicator illuminated Trip Bypass Safety Loop Bypass Fault cannot be resolved (stable, reset, disabled if it doesn’t work)
What are the steps for a faulty safety loop in running?
Master Controller Key switch Main res below 600 (if above 600 go to step 6) Dead mans devices Trip activation VICERS fault light or activation Over speed indicator illuminated Trip Bypass Safety Loop Bypass Fault cannot be resolved (stable, reset, disabled if it doesn’t work)
How long does the PID circuit breaker need to be reset for?
30 seconds
If the overspeed light is illuminated, how would a driver remedy this?
Master controller in coast for 3 seconds
What is the drivers responsibility if a DER is pulled?
Check the CCTV via PEI call Log a TEC call advising of delay Perform FCU Locate affected door Return DER to closed Door may need to be manually closed Submit TMM
If low power is detected in the overhead, what circuit breaker will be needed to be tripped?
TCU
Name the 6 fault lights?
Safety loop, critical defect, maintenance, door, compressor, reduced performance
What does the compressor fault light indicate to a driver?
Main res is below 850kpa
If a door isolated itself, what indication will a driver get?
Door systems fault light
Name the 3 pantograph faults?
All Pantos fail to raise
One panto fails to raise
Pantos fail to lower with pantos down command
Pantos fail to lower with train stable command
Worn carbon strip
Does a compressor fault monitor the mechanical operation of a compressor?
No
What 3 methods rectify faults on a Siemens?
Isolating cocks
Circuit breakers
Train stable
What two cb is checked for failed headlights?
Front lights
External lights
If brake handle in emergency fails, what are the 4 steps to stop the train?
Emergency application
Emergency stop button
Park brake
Key out
