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Metro Traineeship > Xtrap Traction > Flashcards

Xtrap Traction Flashcards

1
Q

What are the two types of Running Brake Tests performed on an Xtrap?

A

Running Brake Test (Service Brake) and Low Speed Running Brake Test (Service Brake)

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2
Q

How is a Running Brake Test – Service Brake performed? (6)

A
  • Power train relatively to track conditions
  • Place master controller into minimum brake
  • Observe braking effort on ammeter and brake cylinder
  • Move master controller further into breaking zone
  • Observe braking effort
  • Return master controller to coast
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3
Q

How is a Low Speed Running Brake (Service Brake) performed? (4)

A
  • Once departure authority has been given, power train to 5km/h
  • Place Master Controller to Full-Service
  • Observe braking effort/brake cylinder gauge
  • Bring train to stand
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4
Q

If a running brake is found to be insufficient, to whom/how is this reported?

A

Phone call to Train Controller and fill out TMM

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5
Q

In CCTV mode, at what speed will camera vision stop displaying (unless a PEI is activated?)

A

3km/h

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6
Q

What can cause a Flashing Blue Door Closed light on an Xtrap? (4)

A
  • Any saloon door failing to prove closed and locked
  • Any fault within the door system and/or train cable connections
  • A coupler fault after recently uncoupling train
  • Door Emergency Release being activated
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7
Q

If a FDCL is observed between stations AND the DER light is illuminated, what should a driver do?

A
  • Acknowledge the auto-PEI call and request passengers stand well clear of open door (inform them of next stopping location)
  • Stop at next platform
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8
Q

If a FDCL is observed between stations AND the DER light is illuminated, AND there is no response on the PEI, what should a driver do?

A
  • Log call to train controller
  • Reduce speed
  • Observe train by monitoring mirrors regularly
  • Stop at next platform to investigate
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9
Q

What is the Main Res pressure in an Xtrap?

A

750 to 900 kPa

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10
Q

What is the Main Res Safety Valve pressure?

A

980 kPa

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11
Q

What is the Brake Pipe Pressure (Normal Operation)?

A

0 kPa

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12
Q

What is Brake Pipe Pressure (Rescue Operation)?

A

550 kPa

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13
Q

What is the Holding Brake Cylinder Pressure?

A

120 kPa

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14
Q

What is the Full-Service Brake Cylinder Pressure?

A

190 kPa

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15
Q

What is the Emergency Brake Cylinder Pressure?

A

210 kPa

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16
Q

What voltage do the air compressors run on?

A

400v AC

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17
Q

What types of cars have the air compressors attached?

A

Tp (trailer) cars

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18
Q

What does the main res supply on an Xtrap?

A
  • Braking system
  • Whistle
  • Aux panel
  • Trip apparatus
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19
Q

What does the auxiliary res supply? (1)

A

pneumatic braking system (friction brakes)

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20
Q

The main res pipe supplies air from the main res on each Tp car to what equipment? (4)

A
  • Aux Res
  • Aux pneumatic panel
  • Scharfenberg Coupler
  • Spring Park Brakes
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21
Q

Under normal conditions, is the main res train-lined?

A

Yes

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22
Q

What are the four braking systems in use on an Xtrap?

A
  • Service Brake
  • Holding Brake
  • Emergency Brake
  • Spring Park Brake
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23
Q

What two brakes do the Service Brake consist of?

A

Electro-Dynamic and Electro-Pneumatic

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24
Q

Are PEI calls recorded in an Xtrap?

A

Yes

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25
Q

When is CCTV and the PEI system operational?

A

When the train is active

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26
Q

What are the three Passenger Saloon Lighting settings?

A
  • Normal
  • Half
  • Emergency
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27
Q

Can you turn Passenger Saloon Lighting off in an Xtrap?

A

No

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28
Q

What are the three types of Cab Lighting available on an Xtrap?

A
  • Off
  • Cab (fluorescent)
  • Desk (spotlight)
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29
Q

What do roof-mounted HVAC units provide?(5)

A
  • Heating
  • Ventilation
  • Aircon
  • Cab foot well heater
  • Demister
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30
Q

What end of the trailer car contains the pantograph?

A

Number 2 end

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31
Q

How can we identify A or B side on the interior of a trailer car?

A

2 yellow Air Conditioner lights on A side, next to Door 2

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32
Q

What are the Roof-Mounted equipment on a Motor Car? (2)

A
  • HVAC
  • Resistor Grids
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33
Q

What are the roof-mounted equipment on a trailer car? (4)

A
  • Pantograph
  • HVAC
  • Lightning Arrestor
  • 2 high speed circuit breakers (HSCB)
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34
Q

What isolating cocks does the Auxiliary Pneumatic Panel contain? (5)

A
  • Whistle
  • Uncouple
  • Trip Cock Reset
  • Trip Cock Active
  • Auxiliary Pneumatic Panel
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35
Q

What colour is the EP Brake Applied light?

A

Red

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36
Q

What colour is the EP Brake Released light?

A

Green

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37
Q

What wheels contain Wheel Slide Protection?

A

Wheels 2, 4, 6 and 8

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38
Q

What wheels contain Spring Park Brakes?

A

Wheels 1, 3 and 7

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39
Q

What’s inside the Traction Container? (5)

A
  • Main Switch
  • Traction Control Unit
  • Traction Inverter
  • Line Inductor
  • Traction Cooling Fan
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40
Q

What does the Traction Inverter do?

A

Converts the 1500 v DC to Variable 3 Phase AC to be used by the Traction Motors

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41
Q

What does the Main Switch in the vertical position tell us?

A

The power is accessible

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42
Q

What is the function of the Line Inductor?

A

It cleans dirty power before sending it to the traction equipment

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43
Q

What wheels contain the Tacho speed sensors?

A

Wheels 4 and 8

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44
Q

What items are in the auxiliary container?

A

Static inverters and battery charger

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45
Q

What are the components of the Xtrap pneumatic system? (5)

A
  • Air Compressors
  • Compressor gov
  • Compressor gov iso cock
  • Main Res
  • Air Dryer
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46
Q

What are the safety equipment in the drivers cab of an Xtrap? (6)

A
  • First Aid Kit
  • Audible Track Warning Devices
  • Emergency cables
  • Flags
  • Fire extinguisher
  • Switch stick
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47
Q

What does the Cab Electrical Equipment Miniature Circuit Breaker Panel consist of? (4)

A
  • Various circuit breakers
  • Safety Loop 100v Supply Switch
  • Air Con Unit Control Switch
  • Door Loop Bypass and Iso light
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48
Q

What key do we use to open the drivers cab and bulkhead door of an Xtrap?

A

V29P

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49
Q

What do we use to unlock the wheelchair ramp on an Xtrap

A

Tri-key (Square shape)

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50
Q

What are the four positions of the Master Controller Handle?

A
  • Power
  • Coast
  • Brake
  • Emergency Brake
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51
Q

At what speed does the holding brake automatically apply?

A

0.5km/h

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52
Q

What safety devices will operate on an Xtrap if the Safety Loop if bypassed?

A

None of them

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53
Q

The Auto Vigilance Bypass is utilised when which items are defective? (3)

A
  • Hand pilot valve
  • Foot pilot valve
  • Trip cock device
54
Q

Is Auto Vigilance the same as VICERS?

A

No

55
Q

What Tacho-linked equipment will only operate when a train’s speed is below 0.5km/h

A
  • Doors release
  • Uncouple button
  • Trip reset
  • Safety Loop Reset
56
Q

In the non-existent scenario where a driver needed to press the Holding Brake button, how long would they push it for?

A

Maximum of 2 seconds
(Until traction power is detected)

57
Q

How often does a MAD button on an Xtrap emit a warning tone?

A

Every 30 seconds

58
Q

Does the trip automatically raise and lower with the insertion of the controller key?

A

No

59
Q

Does the trip automatically raise with the removal of the controller key?

A

Yes

60
Q

What is the minimum power on the Battery Voltometer an Xtrap can be operated on?

A

90 volts

61
Q

What must happen with the master controller key before a driver can press the Stable button?

A

Key must be in and ON (cab maned) prior to pressing stabling button

62
Q

When stabling an Xtrap, when can the Controller Key be removed?

A

Once the High Voltage Presence light has been extinguished AND 5 seconds after the One or More Panto Lowered light has been extinguished

63
Q

How does a driver manually reset the Door Emergency Release handle?

A

The square end of the Tri-key

64
Q

Where are the Saloon Door Isolation Switches located?

A

In the pelmet to the left of each door (except door no. 1 which is in the cab)

65
Q

Where are the Pantograph Manual Raise/Lower devices found?

A

In the pelmet to the right of Saloon Door 4

66
Q

What are the components of the High Voltage Circuit? (7)

A
  • pantograph
  • lightning arrestor
  • line inductor
  • 2 high speed circuit breaker
  • traction inverter
  • Auxiliary inverter
  • rheo brake resistor grids
67
Q

What triggers the electrical raising of the pantograph?

A

When the master key switch on

68
Q

What are the two positions of the High Voltage Supply Switch?

A

POWER (vertical)
EARTH (horizontal)

69
Q

What are the components of the Low Voltage System (6)

A
  • Aux Inverter
  • 400/220V AC
  • 110v DC system
  • 24 v AC/DC system
  • Batteries
  • Air Conditioning system
70
Q

What voltage do the static inverters produce?

A

400v AC

71
Q

What is the only component connected to the 220v AC system?

A

General-Purpose Outlets

72
Q

What are the 3 distribution lines on the 100v DC distribution system?

A
  • Permanent Low Voltage line
  • Prepared Low Voltage line
  • Prepared Low Voltage and Cab Operative line
73
Q

What does the Permanent Low Voltage line supply?

A
  • Pantograph
  • Step light
  • Fluorescent Cab Light
74
Q

When is the Prepared Low Voltage and Cab Operative line energised?

A

Once the Master Controller key is inserted and on

(pantos will raise and 110v DC will energise the line)

75
Q

How is the Prepared Voltage Line activated?

A

When the Master Controller Key is removed, a local switch will activate the Prepared Voltage Line and a service retention mode occurs

76
Q

What’s the important thing happens when a train enters service retention mode (prepared low voltage line)?

A

The train remains prepared

(also pantographs stay raised, cab settings are memorised and lights stay the same etc but we weren’t told to highlight those)

77
Q

How long will an Xtrap run on battery power alone?

A

An hour

78
Q

What powers the 110v DC equipment

A

Battery charger

79
Q

What are the three steps to reset the Trip Cock Device after use?

A
  • The train speed must be below 0.5km/h
  • Train must be stationary for minimum 5 seconds
  • Place the trip switch into Reset

The trip activated light will EXTINGUISH when reset

80
Q

What are we testing when we perform a Safety Loop Bypass Switch test?

A

Testing for short circuiting

81
Q

What two circuit breakers protect the Safety Loop?

A

23Q1 and 23Q2

82
Q

What is not available once the Safety Loop Switch is in bypass?

A

Safety devices and emergency brake

83
Q

What does the Safety Loop Supply switch set to “rescue” allow?

A

Allows power from the rescuing Xtrap to energise the defective trains Safety Loop

84
Q

How long do Saloon Doors stay open on an Xtrap?

A

1 minute

85
Q

What activates the Door Service Retention Feature and what does it allow?

A

If master controller key is released, it allows doors 1,2, 5 and 6 on lead motors to stay open for 10 minutes

86
Q

How many times do doors attempt to close, and at what interval?

A

4 times, and at 3 second intervals

87
Q

If the doors are unable to close, how long will the beeping tone sound in the saloon for?

A

60 seconds

88
Q

What doors contain the external release mechanisms on motors and trailers?

A

Motor: 1, 2, 5 and 6
Trailer: 2 and 5

89
Q

What will occur when a DER is activated? (4)

A
  • The FDCL will flash
  • The CCTV camera covering the activated door will appear on the DDU
  • The ANSW button on the Driver’s Console will flash
  • The DOOR EMY HANDLE ACTIVATED status light will illuminate
90
Q

What pieces of equipment are task linked in an Xtrap?

A

Master controller and whistle

91
Q

How do we reset the VICERS after it has timed out? (4)

A
  • Bring train to stand for 10 seconds
  • Master controller into coast
  • Observe the Emergency Brake Applied light is illuminated
  • Press VICERS acknowledgement button
92
Q

What will occur when a PEI call is made? (4)

A
  • Cab speaker will switch on
  • Alert tone will sound
  • The ANSW button will flash red
  • CCTV will activate once driver answers call
93
Q

What train functions are used by the the Speed Threshold Train Line? (4)

A
  • Door release
  • Uncoupling
  • Safety Loop Reset (after BP pressure reduction during train rescue only)
  • Trip Cock Reset
94
Q

At what main res pressure do both air compressors come into operation?

A

below 650 kPa

95
Q

At what speeds can blended braking occur?

A

Between 5 to 10km/h, or at any time the train decides to apply them

96
Q

At what speed does the ED brake drop out?

A

5km/h

97
Q

What cars contain ED brakes?

A

Motor cars only

98
Q

When will the holding brake release?

A

Once the master controller is placed into power

99
Q

During train rescues, at what pressures will the Safety Loop open and close?

A

Open: below 300 kPa
Close: above 430 kPa

100
Q

If a driver is being relieved at the other end of the train and the original driver is assisting a passenger with special needs, how can the original driver ensure the relieving driver doesn’t drive off before the original driver is ready?

A

Push in the Emergency Stop Button

101
Q

What are the first bits of doing an Xtrap Modified Cab Unattended?

A
  • Master Controller to Coast
  • Reverser to neutral
  • Marker lights to white
  • Remove Controller Key
  • Observe Emergency Brake Applied light

the rest is the same as Comeng

102
Q

If performing a Full Cab Unattended a driver should:

A
  • Make PA if necessary
  • Master controller to COAST
  • Observe emergency brake is applied
  • Reverser to neutral
  • Marker lights to WHITE
  • remove key
  • take radio
  • close and lock doors
103
Q

How do Xtrap drivers communicate during coupling?

A

Through the cab-to-cab function

104
Q

How and where do we perform a continuity test when coupling an Xtrap?

A

Conducted from lead and trailing centre motors.

  • Activate lead cab
  • FEF the Master Controller (Full-service, Emergency, Full-service)
105
Q

When stabling an Xtrap in weather above 25 degrees, what step do we omit from our stabling sequence?

A

We don’t press the “stable” button

106
Q

When stabling a train, how long do we wait after seeing the 1 or More Panto Down light before removing the controller key

A

5 seconds

107
Q

Who do we contact once we’ve finished stabling a train?

A

Fleet

108
Q

What tests are performed in a Full Cab Inspection? (8)

A
  • Brake
  • Hand/foot Pilot Valve
  • Emergency Stop Button
  • Safety Loop
  • VICERS
  • Emergency auto-vigilance
  • Trip
  • Traction Test (lead motor only)
109
Q

What ten things do we look at on a visual inspection?

A
  1. MCB panel for tripped circuit breakers, Door Loop Bypass is normal, electrical panel in normal position
  2. Local and trailing Panto buttons not latched
  3. Ensure Other Cab Active, VICERS fault, Safety System Iso indicators are extinguished
  4. Marker lights set to Auto
  5. Emergency Trainset Mode switch is “Normal” (position 2)
  6. Trip Cock is raised
  7. Check for a cleaner’s key
  8. Emergency Stop Button is not activated
  9. Check first aid kit is present (and other cab equipment)
  10. Check for notices and TMMs
110
Q

How would a driver lower a local/trailing pantograph?

A

Push the Local/Trailing Panto Control button from the lead cab

111
Q

Will the Status Panel operate if the cab is inactive?

A

No

112
Q

What does the Voltmeter indicate?

A

Level of voltage in the storage batteries

113
Q

How many PEIs are in each trailer car?

A

3

114
Q

When do the High Speed Circuit Breakers Close?

A

When the train is prepared for service

115
Q

When do the High Speed Circuit Breakers open?

A

When a short-circuit occurs

116
Q

What two things do the Traction Control Unit control?

A
  • Voltage to the traction motors (powering)
  • rheostatic braking of the train
117
Q

What do the static inverters provide power for? (4)

A
  • 400/220v AC system
  • Air cons
  • Air compressors
  • Battery charger
118
Q

What equipment is on the 400v AC system? (4)

A
  • Battery charger
  • Air compressors
  • Traction Inverter Cooling Fans
  • HVAC
119
Q

In one Static Inverter fails, what equipment will be affected?

A

1 air compressor and 1 HVAC unit will stop working

120
Q

When is the Cab Operative prepared line de-energised?

A

When the controller key is removed

121
Q

Memory retention of the last active cab keeps the settings of what equipment? (7)

A
  • Marker lights
  • Air con
  • Saloon lights
  • train prepared
  • brake indication supply
  • Pantos raised
  • doors
122
Q

If doors can’t be proven closed and a FDCL occurs, how can a driver get traction power?

A

Use the Door Loop Bypass Key Switch

123
Q

If the battery charger fails, how long will Emergency Lighting be operational for?

A

1 minute

124
Q

Do EP/friction brakes operate on Trailer cars?

A

No

125
Q

What does the illumination of the Safety System Isolation Light indicate?

A
  • Door Loop Bypass has been turned
126
Q

At what decrease in main res pressure will the Spring Park Brake apply?

A

580kPa

127
Q

During a post-maintenance prep, which circuit breaker is tripped in the centre motors?

A

22Q6

128
Q

What are the three bypasses on the driving aid panel?

A

Tacho, Auto Vig, Safety Loop

129
Q

If there’s no battery power on start-up, what should a driver do?

A

Check battery not isolated

130
Q

What indications does a driver get if the Safety Loop is de-energised? (2)

A
  • Emergency Brakes Applied status light
  • Emergency brake cylinder pressure (210kPa)
131
Q

What things can open the safety loop? (10)

A
  • 2 keys in and on
  • Emergency stop button
  • Master controller into emergency
  • Trip activated
  • VICERS time-out
  • Auto-vigilance time-out
  • Circuit breakers 23Q1 and 23Q2
  • Loss of 110c DC
  • Main Res pressure switch activated (below 580 kPa)
  • Brake Pipe Pressure below 300kPa in rescue operation

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