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Traction > SIEMENS ELECTRICS > Flashcards

SIEMENS ELECTRICS Flashcards

1
Q

Which circuit breakers will cause the train to fail if tripped?

A

FACES

• Friction Brake & Monitoring
• Automatic coupler control in the Leading Centre Cab
• Cab/ Train Manned
• Emergency Brake Valve
• Safety Loop

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2
Q

When will the Emergency Brake Apply AUTOMATICALLY?

A

TOMBS CV

• coupler fails resulting in the train dividing /
& semi permanent coupler fails between two 3 car units

• BCU Critical fault

• Overspeed exceeded

• A short circuit develops in the Safety Loop (S)

• Main res. Pressure falls below 600 kPa

• Trip is activated

• VICERS activated

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3
Q

Which items on the Safety Loop cannot be bypassed?

A

SEEMM

  • Safety Loop MCB
  • Emergency brake valve
  • Emergency stop button
  • Master Controller Handle/ EMY position

Plus also
- Master key switch

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4
Q

What items cause a critical defect fault light?

A

• A major failure of friction brake system
• A complete loss of Aux power in a unit (both SIVS failed)
• a wheel slip fault affecting the operation of the sanders

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5
Q

When you have a Critical Defect fault light what should you check if fault cannot be found?

A

Check the following MCBs

Friction Brake Monitoring on both Motors & Trailers

Static Inverter Monitoring MCB in the trailer

(F in faces)

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6
Q

Can the train still run with a Maintenance fault light ?

A

Yes

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7
Q

Which equipment can be bypassed by using the Safety loop bypass key switch

To bypass the Emergency Brake Safety Loop ?

A

COMBED V (acronym)

According to courseware:

BCU - Major Event relay
Overspeed relay
Deadmans devices (h/f)
ESB in non-active cabs
Coupler fail relay
Main Res Preassure Relay
Vigilance system ( VM40 still records though)

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8
Q

What does a surge arrestor do?

A

Protects the trains high voltage equipment by grounding surges of power from the overhead wire

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9
Q

What is the purpose of the high voltage container and what does it contain?

A

Collection point of the 1500 v DC

Sends 1500v DV TO Traction container and one SIV

Contains HSCB & ground switch
Contains a BCU which sends commands to Brake Module

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10
Q

What does HSBC do?

A

Disconnects traction equipment from overhead in event of power surges or short circuits

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11
Q

What does Traction inverter do?

A

Converts 1500 v DC to Variable 3 - phase AC to traction motors

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12
Q

What happens when a defect occurs on the Traction motors?

A

They self isolate

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13
Q

What do SIVS supply power to?

A

400v Ac to

Air con
Batt charger
Air compressor
TCU
240v AC GPO via step down transmitter

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14
Q

What equipment does Battery Charger supply 110vDC to?

A

B - charges battery
O - Other various control circuits & equip
L - Internal/ external lighting
D - Door system
E - EP braking equip
S - Safety Loop
T - traction control equip

C - Communication systems

BOLDEST C

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15
Q

What happens if one SIV fails?

A

Battery will get power from other SIV
Air con will operate at 50% rest as normal

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16
Q

How long can batteries last ?

A

1 hour max depending state they were in and what equipment is used

17
Q

What power are pantos?

A

Electro mechanical

18
Q

Where is the panto crank handle located? *

A

2nd cabinet behind door No 2
A side no. 2 end
Motor (DMA /DMB)

19
Q

What must we do prior to raising panto manually?

A

Trip the Panto MOTOR MCB of the affected car

… once we have raised it
Press the self excite button
Activate cab
Press panto up button
Then reset the Panto MOTOR MCB

Do a panto test

If other pantos don’t raise trip the Panto motor MCB again and report TMM fault

20
Q

How and why would we manually lower a panto?

A

If it’s defective

Stable train
Trip out Panto motor MCB
Manually lower using crank handle
Leave MCB tripped
Report TMM

21
Q

What force is used to operate doors?*

A

Electro mechanical

22
Q

What can the door control module do?

A

Sends commands from door release and close buttons to the door

Isolates defective doors and reboots computer attempting to rectify the fault

23
Q

What is the door Control module button for? (Button button)

A

If door is not in sync with other doors, you press the button and it forces door in the opposite position

Button is to the left of each door

24
Q

Door out of order indicator button illuminates when?

A

Illuminates when:

  • a door has been isolated
  • door control unit is defective
  • flashes if door system has failed
25
Q

When do door release buttons operate?

A

Only from an active cab
When the train is stationary

26
Q

How long does the warning tone sound for when the driver presses the door close & lock button

A

4 seconds

The button will flash until doors close

27
Q

After how long and
How many times will doors attempt to close when there is an obstruction

A

3 seconds

3 times

Remains open until driver presses door close button

28
Q

Where are the DERs located?

A

LHS of every door

29
Q

What indicators are there that a DER has been pulled?

A

DER indicator will illuminate in active cab
FDCL
Audible warning buzzer
CCTV will come on automatically

When key is in controller DER is very difficult to open but driver can respond when key is in

30
Q

What can manually apply the EMERGENCY brake ?

A

• EMY stop Button
• MC into EMY
• any control that causes Dead Man feature to become active
• Master key switch in OFF position

• Tripping out the FACES MCBs

31
Q

How do we reset the EMY brake?

A

Put MC into 0 - Coast once train is stationary

32
Q

Which equipment is isolated /bypassed when Safety Loop key 🔑 is operated?

A

COMBED V

M • main res pressure relay
B. • BCU major event relay
D. • Deadman’s devices
C. • coupler fail relay
O •. Overspeed relay
E. • ESB in non- active cabs
V. •.Vigilance System (vm40 still records)

33
Q

If you activate a cab does the trip automatically reset & lower?

A

No

It only lowers automatically
We must reset it

Traction (29 decks)

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