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Metro Traineeship > Xtrap Faults > Flashcards

Xtrap Faults Flashcards

1
Q

How can a driver conserve battery if overhead is lost? (6)

A
  • Reverser to neutral
  • Master Controller Key to Off
  • Headlights to off
  • Cab lighting switch to off
  • Reduce saloon lighting to Emergency
  • Ensure step lights are off by closing cab doors
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2
Q

What is indicated to a driver when one of all of the Major Fault, Major 2nd Level Fault or a Minor Fault light is illumated?

A

There has been a short circuit in the electrical equipment

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3
Q

What does illumination of the AUX Fault light indicate?

A

Static inverter failure

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4
Q

What does illumination of the Traction Fault light indicate?

A

Traction equipment has failed on THIS car

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5
Q

What does illumination of the 1 or More Traction Eq. Fault light indicate?

A

Traction fault has occurred somewhere on the train

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6
Q

What does illumination of the Speed Input Fault light in conjunction with a functioning speedo in the lead cab indicate?

A

The tacho has failed on the trailing 3-car set, but is functioning in the lead 3-car set

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7
Q

What does illumination of the Speed Input Fault light in conjunction with blank speedometer in the lead cab indicate?

A

Tacho has failed on the lead 3-car set, and status of the tacho on the trailing 3-car set is unknown

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8
Q

At what pressure will the Low Pressure in BP fault light illuminate?

A

Indicates BP has fallen below 300 kPa during rescue procedure

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9
Q

At what pressure will the Low Pressure in MRP fault light illuminate?

A

When MR pressure falls below 650 kPa

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10
Q

At what Main Res pressure will the safety loop open?

A

580 kPa and below

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11
Q

What are those three MCBs we need to remember?

A
  • 23Q1 (Safety Loop Positive Power Supply)
  • 23Q2 (Safety Loop Negative Power Supply)
  • 22Q6 (Multiple Unit Relay)
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12
Q

What are the six circuit breakers located in the trailer saloon upper compartment to the left of No 2 Door?

A
  • Tachy Unit
  • BCU
  • Panto 2
  • Panto 1
  • Aux Inverter 2
  • Aux Inverter 1
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13
Q

Under what circumstances is a driver allowed to reset a circuit breaker in the E Box?

A

None. No box for you.

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14
Q

How many times may an electrical fault be rectified in running before declaring the train disabled?

A

Three

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15
Q

What must a driver do before initiating a train stable for fault rectification purposes on the running line?

A

Contact Train Controller – train may not be stabled on mainline without their permission

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16
Q

What is a driver’s go-to method of rectifying an electrical fault on an Xtrap?

A

Train stable

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17
Q

According to courseware, what are the steps of stabling an Xtrap on the mainline for fault rectification purposes? (10)

A
  • Make TEC call to obtain permission
  • Make PA announcement to warn of lighting change/doors locked for 2 mins
  • Close saloon doors
  • Press “Train Stable” button
  • Ensure High Voltage Presence Status Light has extinguished
  • When 1 or more Panto Down light comes on, wait 5 seconds
  • Remove controller key
  • Wait at least 2 minutes, re-activate lead cab
  • Test the fault has cleared
  • Book TMM
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18
Q

When an Xtrap is stabled, how long will marker lights and emergency saloon lights remain illuminated for?

A

15 minutes

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19
Q

What three conditions should we should aim for when deciding where to stable a train on the mainline for fault finding?

A

Ideally:
- At a platform
- Protected by home signals
- Not activating level crossings

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20
Q

What are the four potential causes of a step light not illuminating?

A
  • Step light defective
  • Storage batteries are flat
  • Batteries have been isolated
  • Battery box fuse is blown
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21
Q

How does a driver manually raise the pantographs on an Xtrap

A

We don’t. No crank for you.

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22
Q

What should a driver check if they have activated the cab and it is clear there is no permanent line voltage?

A

The battery isolation switch to see if it is ON.

(If it is on, it can be assumed batteries are flat or fuse blown. If it’s off, driver cannot reinstate)

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23
Q

What should a driver do if the pantographs fail to raise and the voltmeter shows no voltage?

A

Check Battery Box iso switch.
If isolated, report as per FMP
If not, declare the train disabled

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24
Q

What should a driver do if the pantographs fail to raise and the voltmeter shows under 90 volts?

A

Declare the train disabled

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25
Q

What should a driver do if the pantographs fail to raise and the voltmeter shows 90 volts or above?

A
  • Check Local and Trailing Panto Control buttons are not latched in
  • Attempt to raise pantos from another cab

IF THEY FAIL TO RAISE:
- Check 3-Way Switch on trailer car
(if isolated, contact Train Control)
- Check Panto 1 and 2 circuit breakers are set

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26
Q

How do we lower pantographs when we need to isolate one?

A

With the Stable button

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27
Q

How do you isolate a pantograph once it has been lowered?

A

Place the appropriate 3-way switch to the manual lowering and isolated position, then activate lead cab to raise other pantograph.

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28
Q

Can you manually crank-lower a pantograph if it fails to lower with the buttons?

A

I don’t know, I left the classroom to make a cup of tea

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29
Q

What’s the extra step you should do on an Xtrap when coasting under overhead obstruction?

A

Turn the Emergency Trainset Mode Switch to 1 (Online Holding Brake Inhibit)

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30
Q

What is the first thing that will happen if a second key is inserted into a second master controller?

A

Emergency brakes will apply and Major, Major 2nd Level and Minor fault lights may apply

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31
Q

What things can a driver do to rectify a second cab operative? (4)

A
  • cab-to-cab
  • inspect each cab for a second key
  • activate then deactivate each cab
  • if activated cab can’t be deactivated, initiate Train Stable
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32
Q

In case of a second activated cab, and the incorrect cab can’t be deactivated, how is this fault dealt with a) competent employee available b) no competent employee available

A

a) - driver in active cab
- comp. employee in lead cab to operate Emergency Stop button if needed
- Max. 15km/h

b) train disabled

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33
Q

What things should a driver check if the emergency brakes have applied and won’t release? (10)

((i.e. 10 things that activate the safety loop))

A
  • check 110v
  • trip lowered and reset in active cab
  • Master Controller not in Emergency
  • Pilot valve set
  • Has VICERS activated?
  • Emergency Trainset Mode Switch in no. 2
  • Main Res above 580 kPa
  • Another Cab Operative light
  • Circuit breakers 23Q1 and 23Q2 are set
  • Emergency Stop button not pressed
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34
Q

What safety features won’t operate when the Safety Loop Bypass Turret Switch is torn turned? (7)

A
  • Master Controller Emergency Position
  • Emergency Stop button
  • Hand/Foot Pilot valves
  • Auto vigilance bypass button
  • trip
  • brake pipe pressure switch (during train rescue)
  • Main Res Pessure Switch
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35
Q

When the Safety Loop Bypass Turret is turned, how does a driver activate the emergency brake?

A

Let go of the Turret Switch

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36
Q

What should a driver do if a hand/foot pilot valve is defective? How is the train then driven.

A

Turn the Auto Vigilance Bypass switch to Bypass, and isolate the VICERS.

The Auto Vigilance Button will need to be pressed every 30 seconds

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37
Q

What are the four scenarios that require VICERS to be isolated?

A
  • Fault indicator light remains illuminated
  • Safety Loop is bypassed
  • Auto Vigilance is bypassed
  • Abnormal operation of VICERS
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38
Q

How can a driver rectify a defective Battery Charger? What happens if it can’t be rectified?

A

Train Stable

If fault remains, remove from service and book as per FMP

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39
Q

What power do Static Inverters run on an me what do they produce?

A

Run on 1500v DC
Produces 400v AC

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40
Q

What equipment is fucked if both SIVs fail on one unit? (4)

A
  • Both HVACs
  • Battery Charger
  • Both compressors
  • Both Traction Cooling Fans (no traction power)
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41
Q

How to rectify SIV faults? (2)

A
  • If cause is tripped Aux circuit breaker, attempt to reset (you’ll see Maj fault lights)
  • If not, perform Train Stable
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42
Q

What is the result if one SIV is lost?

A
  • only 1 operational HVAC on that 3-car unit
  • only 1 air compressor operational on that 3-car unit
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43
Q

When one SIV becomes defective, what happens to the other?

A

It will automatically take up the load for both SIVs.
While circuits change over, Battery Charger Fault Light may illuminate for 2 mins

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44
Q

Where can the driver access the electric motor to each door?

A

To the left of each saloon door (door no 1 inside driver’s cab)

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45
Q

What are a driver’s first steps when investigating the cause of a door fault?

A
  1. Re-attempt to open and close doors
  2. Make a PA
  3. Full Cab Unattended, take door stickers and make TEC call while you investigate
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46
Q

What are the four positions of the door Motor Isolation Switch?

A
  • (highest) Motor Release
  • Motor Isolate
  • Normal
  • (lowest) Motor Lock Close
47
Q

How does a driver isolate a defective saloon door using the Motor Isolation Switch?

A

Once door has been located and overhead cabinet accessed:
- Motor Isolation Switch to Motor Release
- Manually close door
- Motor Isolation Switch to Motor Lock Close
- Apply Door Not in Use stickers
- Report as per FMP

48
Q

How can a driver identify which motor car has a traction fault? What does a driver do once the car has been located?

A

Activate cabs one by one, and see which one has both the Traction fault light and the 1 or More Traction Eq fault light.
Once located, the driver turns the Traction Isolate switch to Isolate in order to extinguish the light

49
Q

What is the speed threshold on the Tacho Speed Sensors?

A

0.5km/h

50
Q

What equipment will be affected on a train with no functioning Tachometer? (6)

A
  • Door Release won’t function
  • Uncouple button won’t function
  • No Speedo
  • Trip can’t be reset
  • BP pressure can’t be restored post-application in rescue
  • VICERS won’t reset.
51
Q

How many 24v inverters do we need in order for a train to function

A

1

52
Q

How do we reset a faulty DTRS?

A
  • Deactivate cab
  • Trip and restore DTRS circuit breaker
  • Activate the cab

(If fault successfully cleared)

  • Enter TDN
  • Perform radio test
  • Submit TMM
53
Q

How do we isolate a faulty DTRS?

A
  • Insert portable radio
  • Deactivate cab
  • Trip DTRS circuit breaker (do not reinstate)
  • Re-activate cab
  • Portable radio is now primary radio (will not charge)
  • Submit TMM
54
Q

When auto announcements fail, when are drivers required to make PA announcements? (3)

A
  • Junction stations
  • Express running
  • Terminal stations
55
Q

What should a driver do if both PA and DTRS PA are unavailable?

A

Stable train for 2 mins (with permission). Restart, and wait additional 4 mins before testing PA again.

56
Q

What items can a driver use to test for presence of 24v power? (5)

A
  • Drivers seat raises/lowers
  • Marker lights
  • Headlights
  • Windscreen washer/wiper
  • Control panel gauge lights
57
Q

What fault lights will appear when both SIVS fail? (5)

A
  • Aux fault
  • Battery Charger fault
  • Two HVAS stopped
  • 1 HVAC stopped
  • High Voltage Presence
58
Q

What fault lights appear with a service brake fault, and does a driver attempt to rectify it?

A

Lights: Service Brake Fault (possibly also 1 or More Brake Eq Fault).

Rectify (during prep):
- Master controller to Full Service.
- Emergency Trainset Mode Switch to 1, then immediately reapply brake
- (if 1 or More Brake Eq Fault present: turn Safety Loop to TEST for 10 seconds and release)
- If fault not rectified, perform Train Stable

59
Q

What combinations of fault lights can indicate sticking brakes?

A

1) High Voltage Presence, 1 or more Brake Applied.

2) High Voltage Presence, 1 or more Brake Applied, Wheel Slide.

3) High Voltage, All Brake Applied, 1 or more Brake Applied.

60
Q

How does a driver manage sticking brakes that won’t unstick?

A

Isolate the affected bogie

61
Q

What is the first thing a driver check if they receive a fault light combination of High Voltage Present, All Brake Applied & 1 or more Brake Applied?

A

That Emergency Trainset Mode is in Number 2.
(All Brake Applied should only illuminate in Number 1 position)

Then check for sticking brakes etc.

62
Q

What will happen if one air compressor on a 3-car unit becomes defective?

A

The other will take over over, providing there is a SIV operational on the unit

63
Q

What will happen if both compressors on a three-car unit become defective (and car is part of 6-car set)

A

Compressors on other 3-car set will maintain Main Res pressure via the Main Res pipe

64
Q

At what pressure do both compressors work simultaneously?

A

When it falls below 650 kPa

65
Q

What is Main Res operating range on an Xtrap?

A

750 - 900 kPa

66
Q

What should a driver do if Main Res is between 580 and 750 kPa?

A

Book per FMP and monitor

67
Q

What will happen if Main Res is below 580 kPa and what should a driver do?

A

Safety Loop will open.

Driver should ensure High Voltage is present and log TEC call informing of need to fault find.
Once appropriate authority is received, driver should proceed along train inspecting for Main Res leaks and listening to air compressors

68
Q

What should a driver do if air compressors stop working?

A

Attempt a train stable. Train is disabled if fault can’t be rectified.

69
Q

How should a driver proceed if there is a Main Res leak under a centre motor? (4)

A
  • Isolate MR end cocks of affected car
  • Drain the Aux Res
  • Manually release SPBs
  • Book and operate as per isolated bogies
70
Q

How should a driver proceed if there’s a Main Res leak under a non-centre motor?

A
  • Declare the train disabled
71
Q

What direction should an Xtrap be rescued from in the case of main res leak on the a) lead motor and b) trailing motor

A

a) if leak on lead motor, train must be rescued from advance

b) if leak on trailing motor, train must be rescued from rear

72
Q

What should a driver do if a trip fails to lower?

A

Check the Trip Cock Active isolating cock in the Aux Pneumatic Panel (5 cocks in a box)

If cock is closed, open it and continue driving

If cock is open, operate on secondary circuit (raise trip via device switch in cab)

73
Q

What should a driver do if trip fails to raise in the lead cab?

A

Continue normal operation and book as per FMP

74
Q

What should a driver do if trip fails to raise in a trailing cab? (2)

A
  • Isolate the Trip Cock Active Isolating Cock in the Aux Pneumatic Panel (5 cocks in a box)
  • Secure the trip in the RAISED position (tie it up)

(Get track access if necessary, and book as per FMP)

75
Q

What should a driver do if trip fails to reset?

A

Ensure no other fault lights are causing the problem, get track access if needed and manually reset the trip.

76
Q

What should a driver do if they are unable to manually reset the trip using the manual reset thingy?

A

Check the Trip Cock Reset Isolating Cock in the Aux Pneumatic Panel (5 cocks in a box).

If cock is closed, open it and re-attempt to reset.

If cock is open, raise cock and operate on secondary circuit. Book as per FMP.

77
Q

What should a driver do if the whistle isn’t sounding?

A

Inspect the whistle isolating cocks in the A Side Electrical Cabinet.

If isolated, un-isolate.

If not isolated, book as per FMP and run as per Failed Whistle requirements

78
Q

What is the chain of actions a driver perform if a whistle sounds continually?

A

Depress whistle several times.

If this doesn’t work, isolate the appropriate whistle tone isolating cock in the A Side Electrical Cabinet and book as per FMP. Continue using the non-isolated tone.

If this doesn’t work, isolate the Whistle Isolating Cock in the Aux Pneumatic Panel.

79
Q

How can a driver identify which bogie has been isolated on a train-set?

A

Check the LED indicators on the ends of each car. Green lights indicate brakes not applied. Then check position of Bogie Isolation Cock.

80
Q

According to courseware, what fault lights might appear in case of Locked Axels? (5)

A
  • Service Brake Fault
  • Traction Fault (on lead motor only)
  • 1 or More Traction Eq. Fault
  • Wheel Slide
  • High Voltage Presence
81
Q

How should a driver try to resolve an illuminated Service Brake Fault light?

A
  • Place Master Controller to Full Service
  • Place EMY Trainset Mode into 1 (holding brake inhibit)
  • Please Master Controller to Coast, then immediately back to Full Service
  • Place EMY Trainset Mode into 2 (normal)
82
Q

What are the 5 positions of the Emergency Trainset Mode Switch?

A
  1. Online Holding Brake Inhibition
  2. Normal
  3. Rescued
  4. Rescuing
  5. Rescuing in propulsion
83
Q

What position would a driver place the Emergency Trainset Mode Switch in when an Xtrap is rescuing an Xtrap and they can be coupled electrically?

A
  1. Normal (3, 4, and 5 are for non-electrical coupling)
84
Q

What should an Xtrap’s brake pipe read during normal operation?

A

0 (only used for non-electrical rescue)

85
Q

When in a non-electrical rescue scenario, at what pressures does the safety loop open when pressure is decreasing, and close when pressure is increasing?

A

Opens - 300 kPa
Closes - 430 kPa

86
Q

In positions of 4 and 5 of the Emergency Trainset Mode Switch, at what decreasing pressure will traction power be cut?

A

480 kPa

87
Q

When an Xtrap is coupled non-electrically whilst rescuing another train, when will brakes apply on the disabled portion of train?

A

When an Emergency application is made

(Want to know why? This is due to there being no valving within the Xtrap brake equipment to allow for brake pipe to vent to atmosphere from the active cab)

88
Q

How can a driver charge the Brake Pipe on an Xtrap during a Xtrap on Xtrap train rescue?

A

Combined train must be stopped. Master Controller handles on both Xtraps must be placed to Full-Service in the brake zone (with hand on pilot valve) until the Low Pressure in the Brake Pipe fault light extinguishes. Master Controller handles can then be returned to the coast position

89
Q

What kind of trains can Xtraps electrically couple to?

A

Only other Xtraps

90
Q

In case of Battery Charger failure, after how long will the Emergency Brakes apply?

A

60 minutes

91
Q

If there is no 110v DC power supply (due to flat battery), how can rescue be achieved between two Xtraps?

A

The Safety Loop 110v Supply Switch in the driver’s cab circuit breaker panel must be placed to the RESCUE position in all driving cabs of the rescuing train (also in the connecting lead cab of the rescuing Xtrap but that’s not in the courseware).

Safety loop is energised by a trickle charge from the assisting Xtrap via an alternative electrical routing.

92
Q

What is the maximum number of cars that can be maintained in a PULLING Xtrap scenario?

A

12 cars

93
Q

What is the maximum number of cars that can be maintained in a PUSHING Xtrap scenario?

A

9 cars

94
Q

Can an Xtrap pulling an Xtrap manoeuvre be used for a transfer from one stabling location to another via the main line?5

A

No way

95
Q

Can a driver operate the On Line Holding Brake push button as part of fault finding and rectification?

A

No

96
Q

During loss of overhead power, is ventilation and conditioning capability lost?

A

Yes

97
Q

When a disabled non-Xtrap is being pushed by an Xtrap, what position of the Trainset mode would the assisting unit be in?

A

5

98
Q

When a disabled Xtrap is being pulled by another Xtrap (non-electrically), what position of the Trainset mode would the assisting unit be in?

A

4

99
Q

When a disabled Xtrap is being pulled by another Xtrap (non-electrically), what position of the Trainset mode would the disabled unit be in?

A

3

100
Q

When a disabled Xtrap is being pushed by another Xtrap (non-electrically), what position of the Trainset mode would the assisting unit be in?

A

4

101
Q

When a disabled Xtrap is being pushed by another Xtrap (non-electrically), what position of the Trainset mode would the disabled unit be in?

A

1

102
Q

When a disabled Xtrap is being rescued by another Xtrap electrically, what position of the Trainset mode would the disabled unit be in?

A

2

103
Q

If Main Res falls below 580 kPa and the compressors are not running, what should a driver do?

A

Stable the train for fault rectification

104
Q

What are the positions of the Panto Manual Control Switch?

A

Auto, Manual Raising and Manual Lowering and Isolate

105
Q

How many tacho circuit breakers need to fail on two three car units for the speed threshold to remain operative?

A

2

106
Q

If the 0.5km threshold cannot be read, what equipment would not function? (4)

A
  • Doors release
  • Uncouple
  • Recharge brake pipe during rescue
  • Trip reset
107
Q

What actions are required by a driver if the following fault lights illuminate?
- Major 2nd Level Fault
- Air Comp
- High Voltage Presence

A

If Main Res is above 650 kPa, report as per FMP and remain in service

108
Q

Does a driver need to report a DER activation as per FMP?

A

Yes

109
Q

What action is required by a driver should the Park Brake Applied fault light be illuminated? (3)

A
  • Check for signs of sticking brakes
  • Check for air leaks
  • Manually release SPBs on affected car
110
Q

Can one three-car unit charge the batteries of a coupled three-car unit?

A

No

111
Q

(From EMU test)
When must the auto-vigilance bypass button be utilised? (2)

A

Defective trip
Defective hand/foot pilot valve

112
Q

What must a driver try first before attempting to isolate a pantograph?

A

Train stable

113
Q

Within what timeframe should the High Voltage Presence light illuminate after raising the pantographs?

A

30 seconds

114
Q

(from EMU test)
Which safety equipment is not available if safety loop is bypassed? (6)

A

HE-MEAT

  • Hand/foot pilot valves
  • EMY stop buttons
  • Main Res Pressure Switch
  • EMY position of master controller
  • Auto-vig bypass button
  • Trip

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