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Metro Traineeship > Xtrap Traction Condensed > Flashcards

Xtrap Traction Condensed Flashcards

Cause that other one is full of bullshit

1
Q

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

A

3km/h

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2
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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3
Q

What is the Main Res pressure in an Xtrap?

A

750 to 900 kPa

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4
Q

What is the Main Res Safety Valve pressure?

A

980 kPa

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5
Q

What is the Brake Pipe Pressure (Normal Operation)?

A

0 kPa

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6
Q

What is Brake Pipe Pressure (Rescue Operation)?

A

550 kPa

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7
Q

What is the Holding Brake Cylinder Pressure?

A

120 kPa

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8
Q

What is the Full-Service Brake Cylinder Pressure?

A

190 kPa

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9
Q

What is the Emergency Brake Cylinder Pressure?

A

210 kPa

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10
Q

What voltage do the air compressors run on?

A

400v AC

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11
Q

What types of cars have the air compressors attached?

A

Tp (trailer) cars

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12
Q

What does the main res supply on an Xtrap?

A

Braking system
Whistle
Aux panel
Trip apparatus

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13
Q

What does the auxiliary res supply? (1)

A

pneumatic braking system (friction brakes)

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14
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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15
Q

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

A

Yes

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16
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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17
Q

What end of the trailer car contains the pantograph?

A

Number 2 end

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18
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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19
Q

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

A

HVAC
Resistor Grids

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20
Q

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

A

Pantograph
HVAC
Lightning Arrestor
2 high speed circuit breakers (HSCB)

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21
Q

What isolating cocks does the Auxiliary Pneumatic Panel contain?

A

Whistle
Uncouple
Trip Cock Reset
Trip Cock Active
Auxiliary Pneumatic Panel

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22
Q

What wheels contain Wheel Slide Protection?

A

Wheels 2, 4, 6 and 8 of all cars

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23
Q

What wheels contain Spring Park Brakes?

A

Wheels 1, 3 and 7 of M cars

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24
Q

What’s inside the Traction Container?

A

Main Switch
Traction Control Unit
Traction Inverter
Line Inductor
Traction Cooling Fan

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25
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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26
Q

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

A

The power is accessible

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27
Q

What wheels contain the Tacho speed sensors?

A

Wheels 4 and 8 of T cars

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28
Q

What items are in the auxiliary container?

A

Static inverters and battery charger

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29
Q

What are the components of the Xtrap pneumatic system?

A

Air Compressors
Compressor gov
Compressor gov iso cock
Main Res
Air Dryer

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30
Q

At what speed does the holding brake automatically apply?

A

0.5km/h

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31
Q

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

A

None of them

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32
Q

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

A

Hand pilot valve
Foot pilot valve
Trip cock device

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33
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

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34
Q

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

A

Every 30 seconds

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35
Q

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

A

No

36
Q

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

A

Yes

37
Q

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

A

90 volts

38
Q

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

A

Key must be in and on

39
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

40
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)

41
Q

Where are the Pantograph Manual Raise/Lower devices found?

A

In the pelmet to the right of Saloon Door 4

42
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
43
Q

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

A

POWER (vertical)
EARTH (horizontal)

44
Q

What are the components of the Low Voltage System

A

Aux Inverter
400/220V AC
110v DC system
24 v AC/DC system
Batteries
Air Conditioning system

45
Q

What voltage do the static inverters produce?

A

400v AC

46
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

47
Q

What does the Permanent Low Voltage line supply?

A

Pantograph
Step light
Fluorescent Cab Light

48
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)

49
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

50
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)

51
Q

How long will an Xtrap run on battery power alone?

A

An hour

52
Q

What powers the 110v DC equipment

A

Battery charger

53
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

54
Q

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

A

Testing for short circuiting

55
Q

What two circuit breakers protect the Safety Loop?

A

23Q1 and 23Q2

56
Q

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

A

Safety devices and emergency brake

57
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

58
Q

How long do Saloon Doors stay open on an Xtrap?

A

1 minute

59
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

60
Q

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

A

4 times, and at 3 second intervals

61
Q

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

A

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

62
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
63
Q

What pieces of equipment are task linked in an Xtrap?

A

Master controller and whistle

64
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
65
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

66
Q

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

A

below 650 kPa

67
Q

At what speeds can blended braking occur?

A

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

68
Q

At what speed does the ED brake drop out?

A

5km/h

69
Q

What cars contain ED brakes?

A

Motor cars only

70
Q

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

A

Open: below 300 kPa
Close: above 430 kPa

71
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)

72
Q

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

A

Fleet

73
Q

What does the Voltmeter indicate?

A

Level of voltage in the storage batteries

74
Q

What two things do the Traction Control Unit control?

A

Voltage to the traction motors (powering)
rheostatic braking of the train

75
Q

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

A

400/220v AC system
Air cons
Air compressors
Battery charger

76
Q

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

A

Battery charger
Air compressors
Traction Inverter Cooling Fans
HVAC

77
Q

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

A

1 air compressor and 1 HVAC unit will stop working

78
Q

When is the Cab Operative prepared line de-energised?

A

a
When the controller key is removed

79
Q

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

A

1 minute

80
Q

Do EP/friction brakes operate on Trailer cars?

A

Yes

81
Q

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

A

Door Loop Bypass has been turned

82
Q

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

A

300kPa

83
Q

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

A

22Q6

84
Q

What are the three bypasses on the driving aid panel?

A

Tacho, Auto Vig, Safety Loop

85
Q

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

A

Check battery not isolated

86
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)

87
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

Metro Traineeship (32 decks)

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