Ask Yourself Traction - Comeng Flashcards
What is the purpose of the Motor Alternator?
Supply’s 415v AC and 110v DC
Which side of the Comeng is the Brake Unit fitted to?
B side
What are the four positions of the Master Controller?
1 - Shunt
2 - Series
3 - Parallel
4 - Weak Fields
Does the van area Park brake ON & OFF button release the local or train-lined park brakes?
Local
What does the Safety system isolation light mean?
Door loop bypassed
What are the circuit breakers located within the drivers’ cab?
What equipment and buttons are on the drivers’ compartment right hand wall?
What equipment does the P.L.C control?
• Secondary door release function
• Foot Pilot Valve Control Governor Bypass Flashing Light and Button
• Door Chimes
• Door Open and Closed buttons in the drivers’ cab
• Door delay closing relay
• Door Closed Light relay
• Door Loop Bypass controls
• Secondary Pilot Valve
Needs to be done: What are the circuit breakers and switches located in the saloon area?
Where is the BVICS located on Knorr and and Westcode?
Westcode: Left hand side of the drivers seat in foot well
Knorr: Left hand side of the drivers seat on wall beside foot well
Where is the Master Controller located?
The right hand side of the reverser
What functions does the EP STOP flag perform?
It shows that the main reservoir has fallen below a safe level (500 kPa)
Which isolating cock is used to isolate the EP STOP flag?
EP/MR isolating cock
What buttons and equipment are located on the left-hand driver’s console?
What are the four gauges located on the centre console?
- brake Cylinder
- MR/BP
- Speedo
- Ammeter
What button is pressed to de-energise the Self centring device on the Scharfenberg coupler?
Couple button
What are the drivers cab area foot well isolating cocks?
UWVB
- Uncouple IC
- Whistle IC
- Vicers Whistle IC
- BVICS
Does the Ammeter display total train-lined amperage or the local motor car amperage?
Local motor car amperage
Which braking system has wheel slide protection provided during Automatic AirBrake operation?
Knorr (Disc)
During normal operation when does the Rheostatic Brake become ineffective?
When the train drops below 10 km/h
Which cab mounted isolating cock stops the flow of Main Reservoir air to the Brake Controller?
BVICS
Which item of equipment houses the 7-step relay and triple valve on all motor and trailer cars?
Brake Unit
Westcode: behind
Knorr: inside
Is a Driver permitted to place the Brake Controller back to RUNNING and RELEASE after being placed into Emergency while the train is still moving?
No
What limitation applies to the Westcode braking system following several applications of the automatic brake in rapid succession?
You will lose BP pressure
What circuit breaker interrupts the EP brake operation?
EP brake on circuit breaker
What is the rheostatic brake operational speed range?
5 - 115 km/h
What is the brake cylinder holding pressure on a Westcode motor car?
35 kPa
What is the brake cylinder holding pressure on a Knorr motor car?
0 kPa
Which brake or brake system remains operational when the EP brake is isolated?
Automatic Air Brake
Which form of braking provides an extra 10% brake cylinder pressure above maximum regulated EP brake cylinder pressure?
Automatic Air Braking
What source of pressurised air holds the Spring Park Brakes in the released position and what component does this pressure work against?
Main Reservoir Air, it works against the spring in the cylinder
How long should the Spring Park Brake button be pressed to apply or release the train-lined Spring Park Brake?
5 seconds
How many turns of the socket and brace are required to manually release a Westcode Spring Park Brake and in what direction must the brace turned?
6 to 8 times anticlockwise
How many turns of the knurled knob are required to manually release a Knorr Spring Park Brake and in what direction must the knob turned?
One turn anticlockwise
What precautionary step must be taken before manually applying a Spring Park Brake?
The ON park brake in the VAN area must be placed to the ON position
Can a Knorr Spring Park Brake be manually applied?
No.
When will the Train Lined Spring Park Brakes apply automatically?
- When the reverser is turned to OFF
- 60 seconds after reverser has been placed to Neutral
Where are the Spring Park Brake isolating cocks located on a Comeng Motor car?
- SPB IC 1 beside wheel 2
- SPB IC 2 beside Wheel 6
Describe the process of time notching?
With Master Controller in 1 (shunting) the train will power slowly being restricted by resistor grid. After 20 seconds in shunting the resistors will be removed from the grid every 5 seconds until it reaches FULL SERIES.
Describe the process of manual notching?
Just read until you understand the process.
Manual notching is another method to control the rate of acceleration. While time notching will still automatically occur if the master controller is left in one position, acceleration can
be advanced one step at a time by moving the master controller handle forward one position momentarily and back again.
For example, while in SHUNT (1), move the handle to SERIES (2) for two seconds then immediately back to SHUNT (1). You will notice a small spike on the ammeter as a set of resistors is switched out of the circuit. This can be repeated several times before you have effectively stepped up from SHUNT to SERIES. Similarly, from SERIES (2), you can
momentarily move the handle to PARALLEL (3) and back.
There is no manual notching between PARALLEL (3) and WEAK FIELDS (4).
This manual notching approach can be used in cases of extremely poor adhesion due to wet/slippery rails. Comeng trains are equipped with an automatic spin slide control which
should be sufficient to control wheel spin in most common slippery track conditions.
Which position of the Master Controller provides the fastest acceleration?
Weak fields
In which position must the Reverser be to insert or remove the Controller Key?
Off
Which position of the Master Controller is used when operating at low speed?
1 - Shunting
Which circuit breaker protects the Master Controller and Reverser?
The control circuit breaker
What are the components of the Vicers system on a Comeng?
- The vigilance recording system
- The event recording system
What does the VM-40 monitor?
Speed, Whistle, Braking, Headlight etc
How is the Vicers system isolated on a Comeng train?
Via the Key switch
Where is the Trip located?
B side of each motor cab
How is the Trip lowered?
- Open the BVICS and charge the Brake Pipe to 550 kPa
- Operate the Trip Latching lever to the Down position (discharge of air from Trip).
- Place Brake Controller Handle to Emergency position (exhaust all air).
- Return Brake Controller Handle to the Run and Release position (Brake Pipe
charges) - Place Brake Controller Handle into Step 7 EP brake.
The Trip is now in the Set position
How is the Trip raised?
- Have the train stationary.
- Operate the Trip Latching lever to the Up position (discharge of air from Trip).
- Place the Brake Controller Handle into the Emergency position (exhaust all air)
- Return Brake Controller Handle to the Run and Release position (Brake Pipe
charges) - Place Brake Controller Handle to the Emergency position (exhaust all air).
- Close BVICS
- Place Brake Controller Handle to the Run and Release position.
The Trip will now be raised.
When does the DDU become active?
- When BVICS is open
- at least one panto is raised
- an MA is running
What is the effect on the DDU when the BVIC has been closed for more than 3 minutes?
The TDN will need to be re-entered
How is a driver alerted to a PEI activation?
There will be an audible tone and a message will display on the DDU informing the driver.
The carriage number and camera vision will be displayed on the DDU to assist the driver in locating the emergency and to communicate via the DDU fist microphone.
Does the driver have to immediately respond to PEI activation?
No. Only when safe to do so
How long until a PEI call times out and what should the Driver do when it does time out?
90 seconds and driver should make PA announcement to ascertain emergency
What must be entered into the DDU for every revenue service?
TDN
When is a driver to perform the Full Cab Unattended procedure?
whenever a Driver moves more
than 3 metres away from the cab or past the first saloon doors.
What are the steps a driver is to perform for the Full Cab Unattended Procedure?
- PA (if necessary)
- Marker lights to white
- reverser to off
- make sure park brake button has illuminated red and park brake light is on on fault lights.
- Brake controller to emergency
- close BVICS
- run and release
- take keys & Radio
- lock doors and windows
On returning to the cab and opening the BVIC, ensure the TDN has re-inserted into
the fixed train radio via the DDU.
Return the marker light turret switch to Auto
When will a driver perform the Modified Cab Unattended Procedure?
within 3 metres of the front of the train and, only when assisting Passengers with special needs, to the rear of the first saloon door.
What are the steps a driver is to perform for the Modified Cab Unattended Procedure?
• Turn the marker lights to White.
• reverser to OFF.
• Observe PB on button has illuminated Red and the Park Brake light on the
Fault and status panel is illuminated
• Cab door need not be locked
• Fixed train radio volume must be up
• Portable train radio need not be taken
• Observe PB gauge indicates PARK BRAKE APPLIED in leading cab.
- Exit the cab.
- Perform drivers’ duties
- Return to cab
- Insert key
- marker lights to Auto
Which Cab Unattended Procedure is required when assisting a Passenger with special needs while using the primary saloon doors?
Modified
Which saloon doors are the Primary and Secondary ones for assisting a Passenger with special needs on a Comeng?
Primary doors - 1 & 6
Secondary doors - 2 & 5
What must the Driver check while proceeding to the opposite end of the train?
Obvious train malfunctions such as defective doors, windows, lighting, pantographs, or graffiti and platform side cab doors are locked.
A defect is noticed when performing the changing ends procedure. Who must this be reported to?
Train controller
Where is the Running Brake Test – Service Brake Test to be performed?
prior to the first scheduled stop at a suitable location
Where is the Running Brake Test – Automatic Air Brake Test to be performed?
At the first suitable location, not within the boundaries of the Inner Suburban Area
When should the Low-Speed Running Brake Test – Service Brake Test be performed?
When docking a previously prepared train (multiple preparation procedure) out of siding or yard environment.
How do you do a Low Speed Running Brake Test – Service Brake (all train types)?
• at a speed less than 5 km/h, place brake controller handle to the full-service position
• Observe equivalent braking effort using brake cylinder gauges
• Bring the train to a stand
• Assess the trains braking performance
What items can cause a FDCL?
CRAPDOTS
If a FDCL cannot be rectified what effect does it have on the train?
It can’t get traction
Where is the PLC located?
Above Door 3 in all motor cabs
What is connected to the PLC?
Shut fucking door door door door
- Secondary Release Feature
- Foot Pilot Valve
- Door Chimes
- Door Closing Delay Relay
- Door Loop Bypass
- Door Indicator Lights (Drivers)
How is the PLC isolated?
Via PLC switch above door 3
What are the six items of equipment that make up the primary safety apparatus?
• Trip
• Emergency application valve
• Control governor
• Hand and foot operated pilot valve
• Anti-neutralisation device
• VICERS
What is the purpose of the Red EC cock?
to isolate the primary safety apparatus when any item that encompasses it becomes defective.
What is introduced when the Red EC cock is isolated?
The Secondary Saftey Equipment
How is the train to be operated when using the Red EC cock?
It must be driven with the foot pilot valve set
What is the purpose of the Yellow TECHAV cock?
Read and understand
If a non-driving cab has the Red EC cock isolated or contains a defect within the primary safety system on that car, the Brake pipe will not charge and will exhaust to atmosphere, rendering the train disabled.
The Yellow TECHAV cock allows for the train to be driven from another motor car.
In this situation, this Yellow TECHAV isolating cock must be isolated and the Red EC cock reinstated to the normal position to allow the brake pipe to charge.
What must be done with the Red EC cock when the Yellow TECHAV cock is required to be operated?
Read and understand
Red EC cock must be returned to the NORMAL position. The Yellow TECHAV cock is then to be turned across the pipe to isolate the control governor by-pass circuit so that an emergency brake application will not occur.
What notice must be placed in each end driving cabs when the Primary safety apparatus is isolated on the train?
Fault Warning Notice
What safety indicators must be observed before entering the leading cab to raise a Pantograph?
Banners, Tags and flags
What are the three ways the pantographs can be raised on a Comeng train?
• Main Reservoir pressure
• Pantograph storage reservoir (no main reservoir pressure)
• Pantograph emergency compressor (no pantograph storage reservoir air
pressure)
What is the procedure for train start up on a Comeng when Main Reservoir pressure is available?
• minimum of 500 kPa MR pressure
• Press Local Pantograph Raise
• Observe the local pantograph has risen
• Press Start on Local Aux
• Release the saloon doors on both sides to minimise main reservoir pressure usage.
• Press the train lined Pantograph Raise button on the drivers’ console
• Press the Aux Start button on the right hand wall
• Observe the Pantographs have risen along the train and that any fault lights have extinguished.
What is the procedure for train start up on a Comeng train when there is no Main Reservoir pressure and the pantograph reservoir is at 700 kPa?
• Open the cabinet located below the local spring park brake buttons, in the van area.
• If the gauge is displaying more than 500 kPa, turn the wheel valve ANTI-CLOCKWISE to open the air flow to the Pantograph and Motor Alternator systems.
• Press Local Pantograph Raise button
• Observe pantograph has risen.
• Press the Start button on Local Auxiliary
• Release the saloon doors on both sides to minimise main reservoir pressure usage.
• Press the train lined Pantograph Raise button on the drivers’ console.
• Press the Aux Start button on the drivers’ area right hand wall.
• Observe the Pantographs have risen along the train and that any fault lights have extinguished.
What is the procedure for train start up on a Comeng train when all of the pantograph reservoir are empty?
• Ensure the circuit breaker in the Van area cabinet is set.
• Turn the two-way cock to the number 2 position (horizontal).
• Push the white start button. Listen for the audible sound of the compressor running.
• Press the local Panto raise button.
• Once the local pantograph has made contact with the overhead wire, press the local Auxiliary start button
The compressor will time out and must be restarted by pushing the start button multiple times until the pantograph has risen, the local motor alternator has started, and the compressor has supplied sufficient main reservoir air pressure to keep the pantograph raised.
• Press the Pantograph Raise button on the drivers’ console
• Press the Aux Start button on the driver’s area right hand wall.
• Observe the Pantographs have risen along the train and that any fault lights have extinguished.
Can a 6 car Comeng EMU enter revenue service if a Pantograph fails to lower and is unable to be isolated during a train preparation?
No.
What action is required when noting critical defects while performing a train preparation?
Any defects must be reported via a Train Malfunction Message to the Train Controller at Metrol
On how many cabs must the brake test be performed during a 6 car Post Maintenance preparation?
All 4
On how many motor cars must the trip test be performed during a 6 car Post Maintenance preparation?
All 4
On how many cabs must the brake test be performed during a 6 car Mainline or Pre- movement Revenue preparation?
2 - Leading and trailing
Which cabs need to be checked on a Comeng train stable?
Leading cabs, Centre cabs, Trailing cabs
In which cab are the trains pantographs lowered from?
Trailing Motor
How do you do a Running Brake Test – Service Brake (all train types)?
• Place brake/master controller to the minimum application position according to train type
• Observe equivalent braking effort using ammeter and brake cylinder gauges
• Move brake/master controller further into the braking zone
• Assess again for equivalent brake effort
• Return brake controller to Run and RELEASE position
How do you perform Running Brake Test – Automatic Air Brake (Comeng train)?
• Select a location where this test can be carried out safely at a speed that will not
bring the train to a stand during the test
• With the brake pipe fully charged, place the EP MCB to OFF
• Place the brake controller handle to the MINIMUM REDUCTION position of the
service zone
• Observe a minimum reduction of brake pipe pressure and a relevant increase in
brake cylinder pressure
• Make a further reduction of brake pipe pressure to increase brake cylinder pressure
to approximately 150kpa by moving the brake controller handle further into the
service zone
• Assess the braking effectiveness of the train
• Complete a partial release (to approx. 100kPa in the brake cylinders) by moving the brake controller handle to the run and release position and then back into the service zone. Assess the braking effectiveness of the train
• Release the automatic air brake by moving the brake controller handle to the run and release position
• Ensure that the brake pipe fully re-charges
• Place the EP MCB to SET (ON)
How long does the van area emergency cock remain open when performing a
Brake Pipe continuity test?
15 seconds
What distance must a train be stopped from another unit before an attach
procedure?
One metre
What is the whistle code for a fire?
1 short 1 long 1 short
