Xtrap Train Electrics Flashcards
What does the High voltage circuit and equipment consist of? (7 answer)
• Pantograph
• Lightning Arrestor
• 2 High Speed Circuit Breakers
• Line Inductors
• Traction Inverter
• Rheostatic Brake Resistor Grids
• Auxiliary Inverter (SIV).
What 2 places does the power flow to from the traction container?
- Auxiliary container( SIV on tp car)
- Traction inverter (inverts to variable 3 phase AC
Where does the 1500v DC from the Panto go?
Passes through the Lighting arrester and 2 high speed circuit breakers and through to the line breakers on MC cars
What happens to the 1500v DC in the static converters?
Gets inverted to 400v AC for the aux equipment
What does the Battery charger do with the 400v AC?
Transforms to 123v DC got use with train lined control circuits and batteries
Where is the Panto located?
Number 2 end of Tc
How does the Panto raise?
When key is switched on it will automatically raise providing there is enough power in the batteries
What does the lighting arrestor do?
Protects 1500v DC circuits against over voltage and sends back to ground
Where are the HSCBs located?
There are 2 mounted on roof of Tc
What happens if the HSCB is tripped?
No power will be supplied to the train
What does the line inductor do?
Filters overhead power
What do traction motors operate on?
3 phase variable power
What does the TCU do?
Controls voltage into traction motors; amount of supply depends on powering or ED breaking
What are the 2 positions of a High voltage supply switch?
Power supply
Earth
NO TOUCHY FITTERS ONLY
What comprises the low voltage system?
(6 answers)
• Auxiliary Inverter
• 400/220 v AC system
• 110 v DC system
• 24 v AC/DC system
• Batteries
• Air Conditioning system
What does each SIV produce?
400v AC
The output of the SIV supplies power to what equipment?
(6 answers)
• 400/220v AC system
• 110 v DC System
• Air Conditioners
• Air Compressors
• Battery Charger
• Traction converter cooling fans
What does the battery charger do?
Provides 110v DC to the low voltage equipment
And provides a constant charge to the batteries
What 4 functions can only be performed at a speed threshold of 0.5km
Resetting safety loop
Resetting trip cock device
Uncouple
Saloon doors release
STUD
What are the main components connected to the 400v AC system?
(4 answers)
• Air Compressors
• Heating, Ventilation, and Air Conditioning (HVAC)
• Traction Converter Cooling Fans
• Battery Charger
BATH
What is the only compounded connected to the 220v AC system?
GPOs
On what wheels are the speed sensors and what speed is the speed threshold
4&8
0.5km
If one SIV fails the remaining SIV will supply power to what?
• No 1 Air Conditioner on each car
• No 1 Air Compressor
• Full Saloon Lighting
• Both Traction Converter Cooling Fans
• Battery Charger
What are the 3 distribution lines of the low voltage 110v DC system?
• Permanent Low Voltage line
• Prepared Low Voltage line
• Prepared Low Voltage and Cab Operative line.
What equipment does the Permanent low voltage line supply to?
• Pantograph Electric Motor
• Step Lights
• Fluorescent Cab Light
What 4 things will happen in your cab when the PEI is pressed
Cab speaker will switch on
An alert tone will sound
ANSW button will flash RED until pushed
CCTV will activate once driver answers call
What equipment does the prepared low voltage line supply to? (4 answers)
• Train remains prepped
• Panto remains raised
• settings of last cab in service memorised
• Marker lights, Doors and saloon light remembers whatever settings they had prior to key removal
What does prepared low voltage and cab operative supply to?
Everything else
What equipment is powered by 24v AC?
• Headlights ( High beam)
• CCTV cameras
What has to be set before you do a VICERS test
Hand and foot pilot valve
Where are the batteries located?
In a battery box under trailer at number two end
Where is the battery isolating switch and fuse located?
Behind access panel located on A side of trailer inside battery box
How long will the battery’s power the train for?
Up to 1 hour
What 3 steps needs to be taken to reset VICERS
Train at 0km for 10 sec
Master controller in coast
Observe Emy brake applied light is illuminated
What components are the safety loop comprised of?
• Emergency Stop Button (ESB)
• Vigilance devices
• Trip
• Emergency position of the Master Controller Handle
• The Monitoring Pressure Switch in the Main Reservoir Pipe located on the trailer
•The Monitoring Pressure Switch in the Brake Pipe located on the trailer
What are the two circuit breakers that protect the safety loop?
Saftey loop positive- 23Q1
Safety loop negative- 23Q2
Saloon lights selection has 3 positions
1: normal saloon lights
1/2: Emy lights on one side only
0: Emy lights
What will happen if the safety loop de-energises?
• Emergency Brake applied
• Recording of Emergency Brake application by the Data Logger
• Inhibition of Electrical Braking and Traction (Friction Brake ONLY applies)
• Emergency Brake fault light illuminates on the Fault & Status panel
What will happen when the DER is activated
Blue door close light will flash
Door can be manually opened or closed
Traction power only available if in running
CCTV at door DER is activated
ANSW red button on drivers console
Door Emy handle activated status light
When will an emergency brake application occur?
• Main Res Pressure falls below 580 kPa
• Brake Pipe Pressure falls below 300 kPa (during train rescue)
• Trip Cock Device is activated or raised
• Hand or Foot Operated Vigilance Devices are not set, or the Emergency Auto Vigilance Device button is not pressed within 40 seconds during operation of the Vigilance By-Pass
• Activation of the VICERS system
• loss of 110 v DC supply occurs
• Master Controller Handle is placed into EMERGENCY in the manned cab
• The Emergency Stop Button is pressed in any cab
• Two or more keys are inserted at the same time ( multiple active cabs)
• 23Q1 and/or 23Q2 trips in the lead cab
What doors can be manually released
2&5
How do you reset the trip after activation?
- The train speed must be below the 0.5 Km/h speed threshold.
- The train must be stationary for a minimum of 5 seconds.
- Place the Trip Cock Device to RESET and release.
- The Trip activated light will extinguish when reset.
What is the saftey loop test?
By setting the safety loop bypass switch to TEST the safety loop circuit is tested for a short circuit
The safety loop is protected by two circuit breakers
What doors can be External release
1,2,5,6 motor
2,5 trailer
What happens when the safety loop switch is in BY-PASS?
There are NO safety devices on the train and and emergency brake application is not possible
How many times will the saloon doors close
4 times at 3 second intervals
What happens when the bypass switch is released?
The emergency brake will really-apply
Where is the electric door motor located?
To the left of each door in the saloon
Door 1 electric motor is assessed within the drivers cab
How long will the passenger saloon doors beep after a failed closed attempt
60sec
How long will automatic doors remain open?
1 minute
