techav Flashcards
what is the primary safety apparatus
Trip
Emergency application valve
Control governor
Hand and foot pilot valve
Anti-neutralisation device
VICERS
what happens when you turn the red EC cock
you isolate the primary safety apparatus and activate the secondary safety apparatus
where are the red EC and yellow TECHAV cocks located
B side under the drivers window adjacent to wheel 8 on motor cars only
when might you drive on the secondary safety system?
rescuing a train, suffering a fault to one of the TECHAV mechanisms
what is the secondary safety apparatus?
Foot operated pilot valve
Emergency pilot valve
Emergency control governor
Control governor by pass push button
what does the control governor do?
regulates the amount of pressure in the brake pipe to let the train move
how do you engage the secondary safety system?
modified cab unattended
turn the red EC of the driving cab
isolate VICERS key switch
operate foot pilot valve
press by pass push button
how often does the control governor by-pass slush button flash?
every 30 seconds for 10 seconds before engaging emergency
what happens if the red EC cock is turned on a non driving cab?
the brake pipe will exhaust to atmosphere rendering the train disabled
if you have an issue with the primary safety system in a non driving cab what do you do?
turn the yellow TECHAV cock to isolate the entire system and re-instate the red EC
what does the yellow techav cock do?
isolates both the primary and secondary safety systems
where are Spring Park Brakes located
wheels 1,3,5,7
what must a driver look at when performing cab unattended procedures
the illuminated red Train Line Park Brake button
how can you visually tell a park brake is engaged locally?
the gauge will tell you for the wheel locally
how is a spring park brake applied?
the spring is applied by exhausting air to atmosphere
where is the spring park brake gauge?
on the A side wall, green is off red is on
how do you engage train line spring park brake?
press the red park brake on button for 5 seconds
how do you release train line spring park brakes?
hold the green park brake off button for 5 seconds
park brakes will not release unless the reverser is in forward neutral or reverse
how long until the train lined buttons become active after 1 motor Alternator is applied
60 seconds
how can you energise the train line system?
1 panto and 1 motor alternator are needed
when will the train automatically engage spring park brake
after the train has been in neutral for 60 seconds
why might you need to isolate a spring park brake?
if there is a leak of air in the piping
what might you do if there is a defect regarding the spring park brake isolating cock
turn the spring park brake button to the on position and manually release the spring park brake
manual release SPB knorr
use your hand to turn one click anticlockwise, knorr cannot be manually re-instated
manual release SPB westscode
use the socket and brace to turn 6-8 times anti-clockwise
manually engage SPB westcode
with socket and brace 40 to 60 turns clockwise until the nut will turn no further (park brake button must be ON!)
how many SPB isolating cocks are there?
1 per bogie per motor cab so 8?
what are the VICERS tasks?
Powering
breaking
whistle
what are the 5 components of VICERS?
1 task linking
2 acknowledgment button
3 audible buzzer
4 fault indicator
5 activation valve/ relay
what does the VICERS need to run?
110vDC
how long will VICERS function after loss of overhead?
5 minutes until it will shut down and apply emergency brake
how does the VICERS apply emergency brake after 5 mins no overhead
valve on comeng is opened air released
relay will brake the electrical circuit
how can you reset the VICERS
kPa below 25 (emergency)
0km/h
10 seconds
push acknowledge button
what are the three positions on VICERS key switch?
isolate (covered by a flap)
operate
test
what key is needed to turn the VICERS switch from isolate to operate?
pink fitters key
what does the isolate position on the VICERS switch do?
stop the acknowledge button, used when travelling on the secondary safety system because the by pass button is enough to focus on
what happens if you press the vigilance button for 5 continuous seconds?
emergency applied
the VICERS runs on 110v DC attached to the brake pipe, it is energised to hold closed and will dump if if the timing cycle is not acknowledged/ opening the brake pipe dumping air?
how do you test VICERS?
brake pipe needs to be fully charged (above 500 kPa)
reverser to OFF
trip lowered and set
BVICS open
key switch to test
button will flash noise will sound fault light will illuminate and extinguish when test is complete
what are two reasons for VICERS faults?
fault with vigilance system
loss of brake pipe air pressure
what to do if VICERS fault?
never isolate without permission
1 lift the flap
2 insert blue key
3 turn left 90 degrees
report via TMM
(the fault light will remain illuminated after isolation)
how does the trip work?
brake pipe pressure feeds directly into the trio valve and if the trip is activated the valve opens air exhausts
how can you reset a trip?
place brake to emergency position needs 0 kPa to ‘set’
(when it has been activated it will continue to exhaust brake pipe pressure until it has been set)
what can you do if brake to emergency position doesn’t reset the trip
manual reset button on top of the trip valve
can you get traction if the trip isn’t set?
no
what is a good kPa when trip is activated?
under 150 but not 0 or it will reset
low pressure flag
two positions, lowered and raised
what does the LP flag monitor?
main res pressure, will raise if falls too low
electrical current to the EP/rheo
via the electro magnetic valve
what is ideal brake pipe pressure?
550 min 425
what is the main res range?
585-725
trip set/reset pressure
500/0
control governor open
no power
control governor closed
power
VICERS reset
below 25 (brake to emergency)
what controls the main res
compressor governor
BIVICS open
1 main res air through brake controller into brake pipe
2 blue close door button illuminates
3 rheo/ED brake
4 low pressure flag down = lockout magnet valve energised
what does the LP flag warn?
that pressure in the main res is below safe level / 500 kPa
the EP out due to failure or isolation of power supply to lock out magnet valve
brake valve isolating cock and switch is closed
when the LP flag is up who monitors main res pressure?
we do
how do you isolate the LP flag?
turn the EP MR isolate cock
list the cocks behind the panel door next to the park brake
PANTO EP
MA EP
TRIP GEAR
BP SENSOR
PANTO & MA
EP MR
couple button
de-energises the self cantering device for couplings on a curve
uncouple buttons
when the train is set up you can use these to uncouple
compressor contact or button
controls air compressor on the motor car of that switch
what are the two things the duplex gauge tells you
main res pressure- red
air pressure in brake pipe- white
what does the brake cylinder gauge indicate
air pressure in the brake cylinders of the no.1 bogie it is fitted to
amp meter tells us?
electrical current flowing to the traction motors on the motor car it’s fitted too during powering or rheo breaking
how long must you press saloon door buttons?
2 seconds always wait for a steady blue light
safety system isolation
when illuminated indicates door loop system has been by passed to allow traction when flashing door light is operating
local fault light
over load had tripped within the traction equipment system or rheo braking system
line switch illuminated
fault with power supply to traction motors or Line Breaker case
air con lights
off- air con works
steady one air con has failed in a carriage
flashing- both have failed in the same carriage
supply light
illuminated indicated that 110 v DC is operational at least one motor alternator is operating for this
wheel slip light
if it is steady when the train is stationary it means there is a fault in the wheel slip system
centre cab light
when marker light switch is set to ‘centre cab’ which means they’re extinguished - if set to centre can incorrectly the door loop system will fail
test button
is to test the lights on the fault panel
marker light switch
auto- when the train is attached
red- for emergency situations
white- when reverser is off
centre cab- for centre cabs of attached units (may be cause for blue flashing light)
how long will emergency marker lights continue
2 hours, after 1.45 the light status will flash and need to be reset by changing the status of the lights it can then be reinstated. emergency marker lights will activate if pantos are lowered or loss of overhead
stabling indicator light
will illuminate when train is being stabled
if the marker lights are set to auto the stabling indicator will flash for 15mins and then both indicator light and marker lights will extinguish
if your marker light is in the correct position it will stay on for 15 mins
if they are in the wrong position they will last 1hr45
reverser positions
0 coast
1 shunt
2 series - good for taking off in wet weather or on a medium speed aspect
3 parallel
4 weak field
when in reverse or for are the master controller will…
release the pilot valve which means you need to have it set to prevent involuntary emergency breaking
how to use train line park break release
reverser in forward neutral or reverse green park breaks off button for 5 seconds
(apply is same with red ‘on’ button)
door indicator lights switch (not button)
brightness of door indicator lights
LSM switch
protects the over head power from busting up
BVICS
brake valve isolating cock and switch
allows driver to control braking functions of the train
EP brake circuit breaker
will de energise the lock out magnet valve and cause auto air brake to activate (simulates loss of overhead)
this is what you use to drive on air
- DC supply breaker
train lined- protects DC supply circuit (only one needs to be set for the train to move)
- control circuit breaker
if this is tripped on the leading motor the train will fail, if tripped on a rear motor will cause blue flashing light
- AUX control circuit breaker
protects a bunch or circuits
bell
auxiliary start
door release / close (if doors are open and this trips the train will fail)
saloon lights
couple/ uncouple
air con 1
local rheo
schafenberg self centring
- compressor governor circuit breaker
train line park breaks ON and OFF buttons are on this circuit and will not operate in this cab if tripped
local on or off park brake buttons on van wall do not need electricity to operate but
train line park brake needs 110vDC
(local is for divide and attach)
door loop bypass switch
need permission before instigating
no passengers allowed when this is isolated
door light will remain flashing even when isolated
van area emergency clock
applies emergency brake
saloon area switches and circuit breakers
above the number three saloon door (in the carriage)
PLC programmable logic control
saloon door chimes
saloon door secondary release function
door open and close buttons in drivers cab
door delay closing relay
door loop bypass controls
8 things FDCL
doors fail to close
isolate PLC
open circuit in the train cable
marker light in last cab wrong position
coupler sensor defective
aux tripped in the last
control tripped in the last
second BVICS open
when do you need a FWN
lateral sway fault
air bag faults
bogie faults
doors isolate
yellow techav
the speed must not exceed how many kms when skidding wheels
5
flagged will instruct 15km/h until
inspected
bogie isolated speeds
80-100% (1 or 2) 10km off until 60
50-80% no pass extreme caution
less than 50% disabled
how far do you go to protect a train?
500m or fixed signal
radio
keys
flag
DRA
panto faults include
damaged carbon strip
arms
heads
main res air leaks
end of overhead
distanced wires
isolate pneumatically
electrically
mechanically- motors out
theo brake faults
local fault light
theo brake fault light
only operates when the train is in motion so will need a second person to find the this car light while running
