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Siemens Traction > Electrics > Flashcards

Electrics Flashcards

1
Q

Where are the pantographs located?

A

No. 2 end on Mc

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2
Q

What is in the High Voltage Container?

A

HSCB / Earthing switch

BCU

(Same as Auxiliary Container on TCar)

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3
Q

What do the HSCB do?

A

Disconnects traction equipment from overheads when there is a current oversupply.

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4
Q

What does the Traction Inverter do?

A

Converts 1500vDC to 3 Phase variable AC for use by traction motors

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5
Q

What does the TCU do?

A

Receives signals from MCH to control power, braking and holding brake

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6
Q

What happens if there is a defective traction motor?

A

Self-isolated. Driver just reports fault

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7
Q

What do SIVs do?

A

Convert 1500vDC to 400v AC to power BATH

(on exam ‘T’ may be TCU or fan)

And further step down transformer produces 240vAC for GPOs

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8
Q

What happens if one SIV fails?

A

All equipment still works but AC at 50% capacity

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9
Q

What does the battery charger power?

A

Everything that is train lined - 110vDC

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10
Q

What do the Batteries power? (4)

A

Initialising start up systems

Raising pantographs

Step light

Desk light

When loss of overhead or if both SIVs fail they will supply power for limited amount of time.

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11
Q

How do you raise pantographs?

A

Key in and on
Park brakes applied
Wait until all buzzers have stopped
Press Panto UP
Observe they have gone up

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12
Q

What happens to indicator lights when pantographs have raised?

A

Extinguish - Panto Up Button
Illuminates- Line Voltage

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13
Q

How can you lower pantographs? (2)

A

Stable Button

Pantograph Down Button

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14
Q

How do you lower the pantographs via Stable button?

A

Master key OUT

Press STABLE

Observe pantos down and Line Voltage light extinguished

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15
Q

Where is the Pantograph crank handle?

A

RHS door 2 of DM car. (not immediately RHD, next one down)

No. 2 End

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16
Q

How do you raise the Pantograph manually?

A

STABLE

Trip Panto Motor CB

Open cabinet in saloon and Insert crank handle into socket

Turn clockwise, stop when resistance felt

Replace handle

Reset CB

Activate cab and press Panto UP button

Pantograph Test

If all pantographs fail to raise trip CB to isolate the pantograph

TMM

17
Q

How do
You manually lower pantograph?

A

STABLE

Trip Pantograph Motor CB

Open cabinet and use handle to wind Panto anti-clockwise

Replace handle and close cabinet

Leave CB tripped

TMM

18
Q

Where are the door control modules located?

A

Left of each saloon door

(White reset button)

19
Q

When driver presses door close button what happens?

A

Audible tone for 4 seconds while doors close

Door close button flashes continuously until all doors are closed and locked

20
Q

How many times will the doors attempt to close?

A

3

Then you have to try again

21
Q

How long will doors remain open before they close automatically?

A

60 seconds

22
Q

Where are DERs located?

A

LHS of every door

23
Q

What happens when DER is pulled? (4)

A

Illuminate- DER light

FDCL

audible warning buzzer

PEI generates

24
Q

What do you have to do if the Emergency Brake activates?

A

Bring train to stand

MCH to 0

(Different from Xtrap)

25
Q

What are Main reasons emergency brake will apply? (8)

A

Semi- perm coupler fails
Coupler fails
Overspeed
BCU critical fault
Main res falls below 600kPa
Trip activated
VICERS activated
Safety Loop opened

26
Q

What CBS can also cause emergency brake to apply?

A

Safety Loop
Auto coupler in centre cab (B)
Friction brake & monitoring (B)
Emergency brake valve

Door control train line
Cab manned
Train stable

27
Q

How can emergency brakes be manually applied?

A

ESB
MCH to EMERGENCY
Release pilot valve
Master key switch to OFF

28
Q

What happens when you bypass the Safety Loop and the Trip?

A

Safety System Isolate light comes on

You have to
Operate MAD button

Passengers detrained

29
Q

When Safety Loop Bypass switch has been turned what will be isolated from Safety Loop? (7)

A

Main Res pressure relay
BCU major event relay
Hand & Foot pilot valve
Coupler fail relay
ESB
Overspeed relay
Vigilance System

30
Q

How do you reset the Trip?

A

Master key in and on

Illuminated - Trip lowered

Reverser to FORWARD or REVERSE

MCH to 0

Emergency brake releases to holding pressure

31
Q

How do you bypass the Trip?

A

Open MCB panel on bulkhead wall.

Insert controller key into Trip Bypass and turn to “I” position

32
Q

What are the task linked activities that will that will reset VICERS timing cycle?

A

MCH

Whistle

33
Q

How do you reset VICERS?

A

Bring train to a stand

MCH to COAST

Wait 10 seconds

Push acknowledge button

34
Q

What happens to VICERS when Safety Loop and Trip Bypass are operated?

A

VICERS isolated automatically so
You don’t have to turn it off.

35
Q

How do you test VICERS?

A

Train stationary

Cab active

Reverser/ master Selector FORWARD

MCH to COAST

Then push VICERS test button

Siemens Traction (11 decks)

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