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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

• A Dellner or semi-permanent coupler fails resulting in the train dividing

• The electrical coupler fails between two 3 car units

• Over speed is exceeded

• A Critical fault occurs in a brake control unit

• Main res. Pressure falls below 600 kPa

• The Trip is activated

• VICERS activated

• A short circuit develops in the Safety Loop

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3
Q

Which items on the Safety Loop cannot be bypassed?

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

BMOP HEAD

Deadman’s devices
( Low ) Main Res pressure relay
Holding Brake relay
Door close relay
Overspeed relay
BCU major event relay
Auto coupler relay
EMY stop buttons in non- active cabs (can’t be bypassed in active cab)

Also Safety Loop by-pass KEY SWITCH
Trip By-pass KEY switch
Trip

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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?

A

Collection point of the 1500 v DC
Contains HSCB & earthing switch
Sends 1500v DV TO Traction container and one SIV
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

C - Communication systems
L - Internal/ external lighting
O - Other various control circuits & equip
S - Safety Loop
E - EP braking equip
D - Door system

B - charges battery
T - traction control equip

CLOSED in BT

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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

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
Then reset the Panto MOTOR MCB
THEN the self excite button
Activate cab
Press panto up button
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?

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 does what?

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
A 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 when Safety Loop key 🔑 is operated?

A

HOME VB C

M • main res pressure relay
B. • BCU major event relay
H. • Hand / foot Deadman’s devices
C. • coupler fail relay
O •. Overspeed relay
E. • ESB in non- active cabs
V. •.Vigilance System

33
Q

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

A

No

It only lowers automatically
We must reset it

Traction (28 decks)

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