Comeng Formative Gaps Flashcards
What us introduced on the secondary circuit?
FPV
Control governor bypass button
Emergency pilot valve
Emergency control governor
What 4 things cause low pressure flag to rise
MR below 500
Lockout magnet valve deenergised
Loss of OH
BVIC
What 4 things does BVIC control flow of air to?
MR to air brake valves and BP
Electricity to:
- EP and Rheo switches
- LP flag and LOMV
- Door circuit
Purpose of auxiliary res (2)
Charged with BP pressure
Supplies brake cylinders with air
What limitation does westcode braking system have when using air brake
Depleted aux res after several applications resulting in reduced brake efficiency
What braking system has wheel slide protection during air braking
Knorr
Triple valve 3 main jobs
CHARGES aux res
APPLIES aux res air to brake cylinders
RELEASES brake cylinders to atmosphere
PEI time-out time
90 seconds
Anti neutralisation speed
8km
Release SPB knorr
1 turn
Release SPB wedtcode
6-8 turns
Apply SPB knorr
You cant
Westcode SPB apply
40-60 turns
Brake pipe continuity test pressures and timings
15 seconds - below 300
40 seconds - recoved to 425
FDCL causes
Second BVICS
Aux cb
Control cb
Rear marker lights
Door obstruction
Control gov open and close pressures
Open - 310 to 340
Close - 400 to 430
Trip test - what dies BP need to reduce to?
150
When air braking what valve provides a 10% increase to brake cylindars
Restricted application limiting valve and ball and check valve
What dies equalising res do
Allows BP to charge
What does control res do (2)
Supplies air to main equipment case for power and braking
Supplies air to trip latching lever
What does compressor governor do
Monitors MR
What’s the main component in aux equip case
MA
What does line breaker case do
Send 1500v to traction motors
What does main switch do
Stops 1500 to line breakers and traction motors
4 extra reservoirs on a knorr
APES
Aux res
Pre control.
EP res
Supplementary res
Local fault light
Traction / rheo overload
Line switch fault light
Power to traction motors or line breaker faults
What CB is attached to the train lined spring park brake
Compressor Gov CB
6 van area cocks and what they do
What is attached to the PLC CB
SHUT DA FUCKING FUCKING DOOR DOOR DOOR DOOR CUNT
Secondary PV
Door loop bypass
FPV
FDCL relay
Door delay closing relay
Door open close buttons
Door secondary release
Door chimes
Control gov bypass light and button
If PLC CB trips what indication will we have
FDCL
What does regulating valve do (2)
Works with relay valve to duplicate Eq res pressure in the brake pipe
Maintains BP at 550 when EP braking
What is relay valve
Controls flow in and out of BP
What is charge valve
Allows MR to flow to relay valve
What is variable load valve
Works with air suspension, adjusts braking depending on load
What allows 10% extra brake cyls when air braking
Restricted application limiting valve and ball and chrck valve
What is restricted application magnet valve
Prevents air and ep working together
What prevents sticking brakes
Dump valve
What valve om brake unit is used to provide a passage through the triple valve when EP braking
Bypass check valve
Explains full cab
Secure train (apply and iso emy brakes)
Secure cab (TD in portable, call TC, PA, lock everything up)
FDCL causes (8)
Door faults
Control cb in rear
Rear tail lights off
PLC cb
Coupler sensing still coupled
Aux cb in rear
Train cable open circuit (loss 110v)
Second bvics
What’s being tested on EP brake test
ABC wires
35kpa increment increases to b.cyls with step 1 and 2 being the same
What’s being tested on air brake test (functionality)
-Simulate loss of OH when de-energising LOMV
-When in brake zone, your reg, relay and eq res are working to reduce BP and increase b.cyl
-EMY position tests exhaust valve and closing or charging valve
-RR position tests closing of emy exhaust valve and charge valve open
HFPV and cont gov testing
Testing emy application valve
Testing cont gov opens and closes
Trip test testing
BP exhausted through trip valve
BP won’t go below 0 as charging valve still open
Ensuring trip only resets in emy
On a continuity test if BP doesn’t charge to 425 in 40 seconds what could be cause
Blockage
What’s being tested on panto test (3)
Short circuits in control cb
LOMV deegergises
Emy pressure in b.cyls
Detail the ROBBDS test
2 indications I have 110v
Bell
LP flag down
5 causes of traction faults
Control res
Air leaks
Traction overloads
1500v failure
CB fail
Isolating traction faults procedure
MC - off
Controller key in motors switch hole
Choose position
Press OVERLOAD button
Waiting for line switch to extinguish, but may stay illuminated.
Continue to change switch positions to locate faulty motors if required.
What is om the control cb
MR BOPC
Master controller
Reverser
Brake (rheo)
Overload (traction reset)
Panto raise and lower
Control gov
What is on the aux cb
BADSCARS
Bell
Aux start
Door control
Saloon lights
Couple uncouple
Air con 1
Local rheo
Schafenberg self centre
How to isolate panto (6)
Panto lower valve
Inspect
Iso panto ep cock
Iso panto toggle switch
Traction motors all out
Tmm
1 MA fails indication (4)
1/2 saloon lighting
1/2 air-conditioning
1/2 cab lighting
Local rheo innop (no cooling fan)
What is on MR system (10)
Doors
Pantos
MA
Air suspension
BP charge
Comp gov
EP
Control res
SPB
Whistle
Loss of MR pressure steps (4)
Straight into emergency
Check derailed
Wait for MR to rise - if it doesn’t go and find leak
Attempt recharge BP as could be BP instead that’s leaking
If MR doesn’t recover - find leak
MR tank rupture steps (3)
MR delivery cocks
Compressor contractor switch OFF
Comp gov CB
If you have MR pipe rupture what are your 3 goldern rules
DLBP
Iso vicers
Detrain passengers
MR pipe rupture in lead - 7 things to iso
Close end cocks
Lower and iso pantos
Isolate comp gov
Trip EP (emy brake only)
Manually release SPB
Iso motors/rheo
DLBP
MR ruptured in lead is CE needed?
Yes to charge BP
MR ruptured in lead what have you lost (5)
Doors whistle airbag MA control res
MR ruptured in lead speed
15
Mr ruptured in any other motor car, what’s an additional thing that needs isolating
Yellow techav (iso trip)
Mr ruptured in any other motor car, what’s an additional thing that needs isolating
Yellow techav (iso trip)
MR ruptured any other motor car speed
Max 30 (no airbags)
MR ruptured in trailer car - isolated equipment (3)
Trip EP
Close end cocks
DLBP
If BP doesn’t recharge what do we reset and if that doesn’t work what do we turn
vicers
Red EC
How to locate to a BP leak
Isolate end cocks
Check Local SPB in both centres
Enter trailing centre
Open BVICS
Leave in S7
If BP does not charge its in that consist
3 goldern rules with BP pipe rupture
Drive from longest portion BP
15km Max speed
If burst in LM or TM always a comp emp to apply SPB in case of brakeaway
BP leak in cars 1 2 3 isolate (3)
BP end cocks
Release brakes via hand release wire
Trip Ep from droving cab (longest portion BP)
BP leak 1 2 3 where is CE?
In lead to observe track and operate SPB
BP leak cars 4 or 5 isolate COMP EMP AVAILABLE (3)
Bo end cocks
Hand release wire
Trip EP
BP leak cars 4 or 5 where is driver where is comp emp?
Driver in lead
Comp emp in rear charging BP, operating van cockif needed and using SPB in breakaway
BP leak car 4 or 5 extra 2 steps
Isolate MR to 7 step on leaky car
Open bvic in trailing and place handle to r and r
BP leak car 6 isolate and where is comp emp
BP end cocks
Hand release wire
Trip EP
CE in rear to apply SPB in case of breakaway.
BP fails to charge steps (charge valve issue) (6)
Mr to brake controller cock - close
Trip EP
Fan brake RR -> EMY
(This will help free valve)
Ensure SPB applied
Open MR to BC cock
RR
First thing ti check if BP fails to charge (charge valve issue)
Mr to brake controller cock
If freeing charging valve steps don’t work what can we do next (5)
Set EP CB
S7 leave BVIC open
Ensure SPB
Open second BVICS
Apply and isolate
LOMV defect in closed position
No air
Run on EP (15km speed detrain and shunt)
LOMV defect open positio
Super brake (all 3)
Run on air
How to determine if regulating valve defect
Charge BP
Close BVIC
if BP drops - BP leak
If BP does not fall
- EMY
- open bvics
- release brake
If BP only rises to previously low pressure then regulating valve issue
If brake controller moving to a more release position - what do we do (1)
Run on air
Sticking brakes rectification IN RUNNING (3)
Check pressures
Ensure no charge valve air heard
Trip EP -> full service back to RR
Sticking brakes WHILE STATIONARY (2)
Check Pressures
Fan EP brake
Pressure - BP full service reduction
380-410
Number these
1 Restricted application magnet valve
2 dump valve
3 release ensuring valve
4 bypass check valve
5 triple valve
6 restricted application limiting and ball and check valve
7 hand release wire
8 variable load valve
9 7 step relay
Prior to manually applying SPB (westcode) What 2 things should you ensure
Van area park brake button ON
OR
SPB isolating cock turned
FDCL locating procedure (in running)
PA - stand clear of doors
Stop at plat - door sequence
If not rectified close doors
FCA, TEC call, take stickers and PR
Walk to Centre, listen for door chimes
Press door open close again
Get to trailing centre and look for
- markers in auto
- control CB
- open BVICS
- check door light
If doesn’t steady then locate door and isolate and add stickers
LSM needs to be off when (4)
Panto won’t raise or stay raised
MA won’t start
Panto lower for no reason
EP CB keeps tripping
BP leak in car 4 or 5 no comp emp (6)
Iso end cocks
Hand release wire
Iso MR to 7 step
Open BVIC on trailing M and handle to RR
Power and brake from lead on EP
BONUS - iso vicers
During divide - coupler doors not closing. How to move the train (3)
Lower pantos
Close BP and MR end cocks
Raise pantos and move
Divide - coupler doors not closing - how to close
Need 2 drivers
Apply and isolate and park brake on
MR and BP cocks open
Press switch stick in BP sensor
Second driver press uncouple buttons
How to turn off auto announcementd
Mode
Disable audio
