Siemens Traction Flashcards
If the ED brake drops out, what indication does the driver receive?
ED Inhibit button will illuminate
Which unique miniature circuit breaker is in a DMA car?
PA MCB
Which unique miniature circuit breaker is in a DMB car?
CCTV Recorder MCB
What are the available settings of the saloon lighting? (2)
Normal and Emergency
The functionality of the pilot valve is tested by what means?
The Deadman’s Test switch
Where is the trailer car MCB fault panel located?
Right side of No. 2 door
What is the roof-mounted equipment on a motor car? (4)
- Pantograph
- Antenna
- Surge arrestor
- HVAC
What equipment is found on the roof of a trailer car?
HVACs
What force raises and lowers pantographs?
Electro-mechanical force
What is the purpose of the surge arrestors?
To protect the high voltage equipment
What is the purpose of the high speed circuit breakers?
To safely disconnect traction equipment from the overhead in disturbances such as over-current, traction faults or short circuits
What equipment do the static inverters supply? (5)
- HVACs
- Battery charger
- Air compressor
- Traction control unit
- 240v AC GPOs via stepdown transformers
What equipment does the battery charger directly supply? (8)
- Direct charge to batteries
- door system
- internal lighting
- communication system
- external lighting
- traction control equipment
- other control circuits and equipment
- safety loop
Where is the pantograph crank handle located?
MD car, upper right of door 2
How can a saloon door be manually isolated?
Triangle tri-key
Saloon doors automatically close after how long?
60 seconds
What will happen if the safety loop is opened? (2)
Emergency brakes will apply and the traction system will be isolated
What force applies the emergency brake?
Electro-pneumatic (friction) braking
What position must the master key switch be in to stable a train?
Off
How is the emergency brake reset?
- Train brought to stand
- Master controller handle placed to 0
If the safety loop if by-passed, what equipment will be isolated from the safety loop? (5)
- Main res pressure relay
- brake control unit major event relay
- hand and foot deadman’s devices
- coupler fail relay
- emergency stop buttons in non-activated cabs
How long is the test mode available for when performing the deadman’s device switch test?
60 seconds
When does CCTV automatically shut off in the driver’s cab? (2)
- After 150 seconds
- When the train begins to move
How many safety valves are fitted to the pneumatic system?
Two
What type of braking is used on trailer cars?
EP/friction brakes
What is emergency brake cylinder pressure?
280 kPa
What is holding brake cylinder pressure?
110 kPa
what is main res operating pressure?
850 - 1000 kPa
The park brake automatically applies when the main res falls below which pressure?
350 kPa
What wheels have park brakes?
3 and 7 of all cars
The safety loop will de-energise if the park brake is applied when the train’s speed is over…?
5km/h
How do we activate the Secondary Safety Circuit?
Turn the Safety Loop By-pass Key Switch to the no 1 position
Turn the Trip By-pass Key Switch to the no 1 position
How can the Siemens Safety Loop be reset?
Placing the Master Controller to 0
Can a single driver conduct a continuity test when coupling two trains?
Nope
Does each brake unit operate independently?
Yes
What functionality tests are performed on a mainline prep? (5)
- Brake test
- Traction cut-out test
- Vigilance devices test
- VICERS test
- Trip test
EP braking is determined and controlled by which piece of equipment?
BCU
True or false: each brake module supplies braking effort to one bogie
True
When attaching, how far should the first unit stop from the second unit?
1m
Can an attach be performed with two active cabs?
Nope
Upon stabling, what switch light should a driver be checking for illumination in each cab?
Park brake turret switch light
What function does the Pressure Limiting Valve serve?
Adjusts pre-control pressure to relay valve
What is the function of the Relay Valve?
Charges and vents air pressure to and from brake cylinders
What does the Analogue Converter do?
Converts processed electronic signals from the BCU into pre-control pressure sent to the relay valve
For the ED brake to drop out, the braking effort must fail below which value before the TCU demands the EP Brake to take over?
90%
If the ED brake is lost, how can a driver reset the ED brake?
Master Controller to 0 or Power for one second, then return controller to braking position
When is the sanding system utilised?
Even the TCU senses wheel slide
How is the VICERS reset? (4)
- Bring train to stand
- Master Controller to coast
- Leave train like this for 10 seconds
- Press VICERS acknowledgement button
What is the purpose of the Towing Unit?
to read and write brake pipe pressure during non-electrical rescue
Is the towing cock open or closed in train rescues?
Open
What is the purpose of the towing cock in a rescue situation?
To reduce Main Res pressure to 700 kPa
What does the Traction Control Unit do? (2)
- Relays info from master controller to the traction motors (via traction inverter)
- releases/applies holding brake
What are the positions of the Master Selector switch? (4)
- Neutral
- Forward
- Reverse
- Set speed
What needs to be completed before the Master Selector can be set to Forward (2)
- Master controller to B6
- Key in and on
What indications does a driver get when a PEI is initiated?
- Audible tone sounding through cab speaker
- Flashing Red Emergency intercom button on drivers console
What are the positions on the Master Controller handle? (4)
- Emergency
- Brake
- 0
- Drive
What happens if the pressure governor has been isolated?
It will run continuously
What are the three components of the air suspension system?
- levelling valves
- air bags
- surge reservoirs
10 components of the Safety Loop?
- Loss of 110v DC
- overspeed relay
- MR relay under 600kPa
- coupler fail
- ESB
- Master controller to EMY
- trip
- critical fault in BCU
- dead man’s switch
- VICERS
What’s the speed threshold?
0.2 km/h
Is wheel slip protection active during emergency braking?
Yes
What equipment on a Siemens use compressed air? (6)
- Whistle
- Air suspension
- Service (friction) brake
- Park brake
- Aux reservoirs
- Main reservoir
What pressures does the pressure governor start and stop the air compressor at?
Starts compressor at 850 kPa, stops compressor at 1000 kPa
What happens if one static inverter is not working?
Air conditioning will operate at 50% – other equipment supplied by static inverters will operate as usual
How will a Static Inverter fault be displayed to a driver?
Maintenance Fault and Unit light will illuminate on Fault Panel of the active cab, and the SIV light will illuminate on the fault panel of the affected T car
What are the steps to raising the pantographs? (7)
- Master key in and on
- check park brakes are applied
- wait until all buzzers have stopped sounding
- press Pantograph Up button
- Check line voltage indicator is illuminated
- Check Panto Up button extinguishes
- Visually confirm pantos have risen.
What two ways can the pantographs be lowered?
- Stable button
- Panto down button
Can you use the Panto Down button to stable the train?
No – you will drain the batteries you dingus
How do we lower pantographs via stable button?
- Have master controller key OUT of key switch (park brake light on)
- Press stable button
- Ensure pantos have lowered and line voltage light extinguishes
Where is the manual pantograph crank located?
on A side at the number 2 end of motor cars (to the right of door 2)
How do we manually isolale doors?
with triangle tri-key, in the pelmet above each door
How many times will doors attempt to close, and at what interval?
3 times, at 3 second intervals
How long does the audible door close warning tone go for?
4 seconds
Where are DERs located?
To the left of each door
What indications does a driver get if a DER is activated? (3)
- Audible warning buzz in cab
- Flashing door closed light
- DER indicator will illuminate
Which circuit breakers will cause the emergency brake to apply? (6)
- Door control train lined
- Friction brake & monitoring
- Auto coupler control in lead centre cab
- Cab/Train manned
- Emergency brake valve
- Safety loop
The emergency brake can be manually applied by: (4)
- Emergency stop buttons
- Master controller into emergency
- Deadman’s switch activates
- Master key turned to OFF
How do we reset the trip? (5)
- key in and on
- observe Trip Lowered light illuminated
- Reverser to a driving position (FWD, REV or set speed)
- Master controller to 0
- Observe brake cylinders have released to holding pressure (110 kPa)
When operating on the secondary circuit, how often will the MAD button demand attention? (flash and emit tone)
Every 45 seconds, you then have 10 seconds to acknowledge it.
What conditions does the cab need to be in to perform a VICERS test? (4)
- Train must be stationary
- Cab must be active
- Reverser in FWD
- Master controller in Coast
How many disability discrimination act alarms are there on a Siemens?
4 – directly behind each cab
How long does the CCTV activate for, if someone has pushed the DDA request button?
10 seconds
Where is the whistle isolating cock located?
In a panel in the driver’s console to the left of the driver’s seat
Where is the Trip Circuit Breaker located?
Behind the panel with the fire extinguisher
How do we activate the Towing Unit?
Brake Pipe Mode Key Switch set to 1
When is a Towing Cock used, and what does it do?
Used when coupling a Siemens to a Comeng. It lowers Main Res pressure between cab and coupler to 700 kPa
What reservoirs are at no 1 end?
- Aux res
- Air suspension res
- Surge reses
What reservoirs are at no 2 end?
- Main Res
- Aux res
- Air suspension res
- Surge reses
What’s in the High Voltage container?
- HSCBs
- Brake control unit
How many sander boxes are on motor cars, and what wheels are they on?
Two – on wheels 3 and 6
Where is the main circuit breaker panel located?
Above the OJT seat
What is the maximum speed allowed on Set Speed?
6 km/h, however at 8km/h the emergency brake will apply
What speed is the Overspeed system set to activate the emergency brake at?
125km/h
What will happen if the Deadman’s Switch is not set and the train is above 0.2km/h
A tone will sound for 3 seconds and then the emergency brake will apply
At what speed will the Over Speed light illuminate and tone sound?
119km/h in FWD, 6km/h in Set Speed
How many times will the DDA button flash white before remaining steady?
5 times
What is the Uncouple button indicating when it is steady red and flashing red?
Steady red – the train is coupled to an adjoining unit
Flashing red – main res pressure has dropped below 850 kPa
When do park brakes automatically apply?
When master controller key is turned off
Under normal operation, how often does MAD button emit a tone?
30 seconds
What are the three main causes for a Critical Fault Light to illuminate?
- Major failure of friction brake
- Loss of auxiliary power (both SIVs have failed)
- Wheel slip fault
What are the main causes for a Maintenance Fault Light to illuminate? (7)
- Defective traction system
- Defective static inverter
- Defective saloon door that has been isolated
- Brake not released on a unit
- Defective HVAC
- Defective PA system
- Defective CCTV system
Does the Compressor Fault Light tell us if the compressor is faulty?
Lol, no. It illuminates when air pressure drops below the pressure switch setting and air pressure is not recovered to normal main res settings.
When would the brake pipe mode indicator begin to flash in the driving cab?
When the switch has been turned for the purposes of train recovery or rescue
How long does the Electric Brake Inhibit button isolate the electro-dynamic brake for?
5 minutes
What are the three bypass key switches?
Door loop bypass, safety loop bypass, trip bypass
How many positions on the brake pipe mode key switch?
5
(0 to 4)
What are the positions on the mode key switch?
0 - normal
1 - pushed by other train
2 - pulling other train
3 - pulled by other train
4 - pushing other train
What happens if the Shutdown Delay MCB trips when the train stable button is operated?
You won’t be able to stable the train
(pantos won’t lower on unit with tripped MCB, SIVs won’t shut down, saloon lighting will stay on)
How do we divide a train with 1 driver? (long answer, familiarise – not memorise)
CHECK:
- No flags, tags, banners
- Pantos are raised
- train is in correct position
IN CENTRE CAB:
- Check for TMMs/notices
- Activate cab
- Ensure emergency pressure in cylinders
- Park brake is illuminated
- Press uncouple
- Observe uncouple button extinguish
Then change ends on same unit and toot toot away
How do we perform a safety loop continuity test after attaching?
- Make lead cab active
- Call centre cab
- Master controller to 0, hold pilot valve
- Master controller to EMY
- Master controller to 0
Are the train’s cab doors included in the Door Loop system?
Yes
What pre-cab visuals do we perform in a train prep? (8)
- TMMs and notices
- MCB panel and bypass key switches
- Cleaner’s key
- Check PB applied
- Other Cab Active light
- ESB
- First-aid kit
- (*centre motors only - Uncouple light illuminated)
How do we perform a train start-up? (7)
- Key in and on
- Listen for audible tones
- Once silent, press Panto Up
- Observe pantos externally
- Observe High Voltage light on, Panto Up light extinguished
- Check PB applied
- Ensure saloon lighting on
What is to the right of doors 2 in motor cars and trailer cars?
Motor cars = Panto cranks
Trailer cars = MCB panels
What’s our High Voltage equipment? (7)
- Pantographs
- Antenna
- Surge arrestors
- HSCBs
- Grounding switch
- Traction inverter
- Static inverter
What’s our 400v AC voltage equipment?
- Battery charger
- Air compressor
- Traction control unit
- HVACs
What are the train-lined fault lights? (6)
- Safety loop
- Critical defect
- Maintenance
- Reduced performance
- Door system
- Compressor
What circuit breakers will give us an emergency brake when tripped? (6)
Which two can be bypassed? **
- Safety Loop
- Auto coupler control **
- Friction brake and monitoring **
- Emergency brake valves
- Cab train/manned
- Door Control Train Lined
How many PEIs in each saloon?
2 (next to doors 1 and 2)
What position does the selector switch/controller need to be in to remove the key?
Selector switch in neutral, controller in B6
How long after losing the pilot valve will the emergency brake apply?
3 seconds (one audible beep per second)
What does the Reduced Performance fault light indicate?
One or more traction systems on a unit has become defective
What is the ED brake inhibition button used for?
To test the operation of the ED brake by isolating the ED brake. Used by maintenance
How many circuit breakers in the cabinet?
36
When the safety loop is bypassed, does it bypass the equipment on the safety loop?
Nope
What does the Safety Loop Bypass switch bypass?
- Pilot valves
- Low MR
- Holding brake relay
- Door closed relay
- Overspeed
- BCU major event relay
- Auto coupler relay
- ESBs in non-active cab
Where are HSCBs located?
In the High Voltage container
What voltage do GPOs use?
240v AC via stepdown
How is the primary PA system operated?
- Press “Cab to Saloon”
- Use cab microphone and press “PTT”
What are the two safety valve settings?
Between compressor and air dryer = 1100 kPa
Between air dryer and main res = 1050 kPa
What systems use compressed air?
- Main res
- Aux res
- Air suspension res
- Horn
- Park brake
What supplies the Air Bags and what is their function?
Supplied by Surge Reservoirs, supplies air directly to air bags when unbalanced
Function of levelling valves?
Inflate/deflate air bags according to load
