Faults Comeng - Revision Flashcards
When rescuing a train and you’re pulling it out of section and it has no pantos up, what cock do you need to turn?
Techav (to remove trip)
???? Saloon lights - running emergency
Yes
Trips switches guages cocks, what’s next?
DC supply light
Hiw can you tell you have no DC supply
No bell
LP flag raised
What is the control res pressure
490kpa
Effect on train if you have control res rupture
Line breakers fail to close
If a control res has ruptured, what fault lights will you get?
Line switch
If you have a control res rupture how do you isolate motors?
Motors all out
What can you press in the cab if you have traction issues
Traction overload
Do we touch the main switch?
No
What 3 things are supplied by the 1500v DC
MA, compressors, traction motors
How many times does substation restart during overhead loss?
2x
During overhead loss what happens to doors?
Release
Overhead loss - what will all trains in section be asked to do?
Lower pantos
Overhead loss, with comms, at what time intervals will trains depart once overhead has been restored
One minute intervals
During overhead loss and trains begin to clear the section again, what notch of power should they use?
Series
AC power items (3)
Non-emergency saloon lights (normal lighting)
Van area cab light
Operation of headlights
Overhead loss and no comms, at which time of the clock will UP trains and DOWN trains move?
⬆️ 30 seconds
↕️ 60 seconds
Overhead loss, how long will battery backup last?
2 hours
Wheb overhead power is lost, what fault light will flash on drivers fault panel?
Battery charger (to indicate a reset of the emergency lighting is required)
What does the LSM do?
Protects the sub station from the train
LSM speed threshold for time delay?
8km
Overhead loss, LSM activates when the output of MA’S drops below what voltage?
95vDC for 2 continuous seconds
During overhead loss what two things are still available?
Emergency lighting
PA systrm
LSM operation - train moving over 8km/h, BVICS open overhead lost, timers WITHIN 4 minutes - what does LSM do to train?
Lowers all trailing pantos
Shuts down local MA
Trips EP CB
Overhead loss - to locate defective train, Train Control will request drivers to do what?
Raise each panto individually
Start each MA locally
Overhead loss - how many minutes until vicers times out?
5 minutes
Will traction overload button work if MAs have oversped
No
How to isolate rheo brakes?
Toggle switch
What does a steady air con light indicate
1 AC in 1 car down
What does a flashing aircon light indicate
More than 1 AC in 1 car down
Where is the fault if the wheel slip fault light illuminates while stationary?
Wheel slip unit
Wheel slip axle km difference
15km
What is part of the control CB
MRBOPC
Master controller
Reserver
Rheo brake
Traction overload
Panto raise and lower
Control govener
What happens to train if control CB trips?
Fail to power
If you’re leading panto fails to raise, how will you get your pantos up?
Raise individually
If your pantos won’t lower what happens to train?
Out of service
If control cb trips in trailing cab, what indication will you get in lead?
FDCL
???? Scenario based question about locating control CB trip cause
Reverser is the cause
???? Scenario based question about locating control CB trip cause
Rheo demand wire is the cause
How to isolate rheo train lined?
Flip EP CB
???? What is the lowest % of traction motors (isolated bogies?) can you continue driving with
50%
???? (Forget how the question was worded)
Is 110v train lined?
Yes
How many MA’S need to be running for full saloon lighting?
All
1 MA running effect on train
Half saloon lighting each car
Half AC each car
Local rheo brake will be inoperative
Effect on train if no DC supply
Disabeld
Effect on MA If compressor governers fail in closed position
Run continuously
Effect on compressor governor if compressor governor cb tripped?
Isolates local compressor govoner
What would be the affect on the train if you pneumatically isolated a compressor governor by rhetorical isolating cock
Compressor runs continuously
Compressor running continuously what CB can we check and isolate?
Check and isolate local compressor govoner
Auxiliary circuit breaker components
BADSCARS
Bell
Auxiliary start
Doors release and close
Saloon lights on and off
Couple and uncouple
Aircon #1 control
Local rheo brake
Shcfenberg self centring
What connects to MR air
Picture
brakes available if MR ruptured in lead?
Emergency
MR ruptured in motor car, what do you need to do / isolate
Local Panto electrically and pneumatically
Comp gov
Motors all out
Mr end cocks
Release SPB
Mr rupture in trailer car, what have you lost/what needs to be isolated
Doors
Air suspension
End cocks
MR rupture in lead, do you need a competent employee?
Yes
brakes available if MR ruptured in lead centre
Air brake
What cocks to turn if MR tank ruptured?
MR delivery
Isolate compressor govener
If isolated air suspension and you’re in a 50 track speed zone what speed do you need to do?
25km
( restriction = max 30 or half track speed)
Effect on train if control res ruptures
Insufficient air to close line breakers
Leak in control res effect on train
line breakers cannot close
In addition to isolating control res cocks during a leak, what else must be isolated?
Motors all out
Whistle defect
Depress multiple times
If BP rupture, first thing we check
Derailed
If you see a sudden decrease in BP pressure, and you put controller to emergency then back to run and release and BP charges…what has happened?
Back tripped - trailing trip gear activated
BP rupture in cars 1,2 or 3 (on 6 car) can you drive from lead?
???? No lead driving
BP rupture car 3 - where would comp emp sit?
Lead
BP rupture in lead car 1 - during rescue what brakes do you have in the lead?
Spring Park brake
BP car 4 - do you need comp emp?
Do not need a competent employee
BP rupture car 5 and no competent employee, what brakes do you have?
EP
BP rupture in car 4 or 5 and no comp emp, what can you isolate on brake unit?
MR -> 7 step relay
BP leak in brake unit branch pipe between brake unit iso and trip valve iso speed restriction
10km less if above 60km (treat it as an isolated bogie)
Charging valve is closed in what position?
Emergency
???? Defect BP speed
15km
BP is failing to charge when in Run and release and bvic open - what can we check?
MR to Brake controller
Unable to free jammed charging valve do we need a competent employee?
Yes
Speed if charging valve not charging in lead ????
15km ????
Lockout magnet valve faulty in deenergise (open) positon brakes
Super brake - air ep and rheo working simultaneously
What to do if lockout magnet valve defective in closed (energised)
Place Brake controller into emergency
Run EP/Rheo
Restricted to 15km
Lock out magnet valve brakes when faulty in energised (closed) position
No brakes
What is connected to the emergency application valve
Hand and foot pilot valves
If defective EAV how must train be run?
Secondary circuit
Control gov bypass timer
30 seconds
Purpose of release prevention valve
Prevents release of auto air
What do we run on if release prevention valve not working
EP and rheo
How to ascertain BP not charging correctly due to regulating valve defect or BP leak?
Close bvic
If BP drops then BP leak
If doesn’t drop then -
EMY
Open BVIC
Release brake
If it only charges back to previously low pressue then its regulating valve at wrong number
If BP is charging between 425kpa and 550kpa, what brake will we run on?
Ep and rheo and monitor BP
If BP not charging above 425, what will we need
A comp emp to charge BP from trailing motor
If brake handle releasing towards release positin what brake do we run on?
Air brake
What component of the brake unit is used to assist in preventing sticking brakes?
Dump valve
How will we know if we have sticking brakes
Wheel slip fault light
Retardation of brakes
Smoke/smell
LSM operation - all BVICS closed, speed is zero and timers have been reset (over 4 minutes) - What happens to pantos and MA’S?
All pantos will lower
MA contacts will set to OFF
MR operating pressure
585-725
If MR tank ruptured why would you isolate the compressor governor?
To stop compressor running continuously
Train rescue - disabled train has electrical fault, will you couple up electrically?
No
Train rescue - when pushing disabled train out of section what will I need to do in my cab?
Red ec cock
Raise trip
Control gov bypass
Set foot pilot valve
Door loop bypass
Isolate vicers
If coupling non electrically, what brake have you got?
Air
Saloon lights CB is located where?
Above door 3 in the saloon
Saloon light failure in regular sequence cause?
Circuit breaker has tripped
Saloon light failure in irregular sequence?
Tube is faulty/blown
If there is a saloon light failure, no emergency saloon lighting and its daylight, can you still run train?
Yes
Reasons for FDCL
Doors
Control CB tripped
BVIC
If FDCL not rectified, what do you do?
Door loop bypass
If 1 door is faulty is it likely caused by pneumatic, mechanical or electrical fault?
Mechanical
If all doors In 1 carriage faulty what is cause?
Pneumatic issue
If all doors on entire train faulty what is cause?
Auxiliary CB
If you have sticking brakes in running, what do you do?
Trip EP CB
Make full service brake application
If sticking brake while stationary what do you do?
-Step 7 -> run and release multiple times (to flush out obstructing)
-Release brake and go for power
-If train rolls freely, can go back in service
Brake blocks - have deteriorated just past the 10mm line, is it still serviceable?
Yes
If metal backing on break is touching brake what do we do?
Isolate bogie
Piston travel mm’s
30 - 65mm
If no continuous BP what is speed restriction?
15km
Brake handle defective in release position, what brake do we run on?
EP/Rheo
