Siemens Underframe Equipment

Question 1

How is trip lowered? Automatically or Manually?

Answer 1

Automatically as soon as cab is activated
However it needs to be reset before EMY brake will release

Question 2

How is trip powered on a Siemens?
Air
Electrical
or Mechanical?

Answer 2

Electrically

Question 3

How do we know trip has been activated and how can it be reset?

Answer 3

Trip reset switch will illuminate RED

RESET procedure:

1. Train must be stationary
2. MC must be in 0 (COAST)
3. Turn trip reset switch to the right and it will spring back

Question 4

What is the purpose of the Towing unit?

Answer 4

It reads to and from the brake unit during a
NON- ELECTRICAL rescue

The Isolation Cock needs to be in line with the pipe

Must be in Brake Pipe Mode (key switch in ‘I’ to be active

• more info page 10

Question 5

When operating a Brake Pipe Rescue using the Towing unit how must the trains be coupled?

Electrically
Pneumatically
Mechanically?

Answer 5

Must NOT be coupled Elecetrically

Question 6

When Brake pipe mode is in Off position what does that mean?

Answer 6

Brake system on train is operating normally
(Not in rescue, not using towing unit)

Question 7

When in Read Mode (Towing unit operation) what is the Brake PIPE pressure when brake step in 0 (coast)

Answer 7

480 kPa

Question 8

When in Write Mode (TU1) what are the Brake PIPE pressures at each step of the brake zone?

Answer 8

0 (COAST) is 550 kPa

Pressure Gradually decreases as you move to higher braking effort

Emergency brake is 300 kPa or less

Question 9

What is the purpose of the Towing cock?

Answer 9

It is used to reduce the Main Res pressure between the Siemens and the Comeng when performing a Train Rescue

(So Comeng safety valve doesn’t activate due to overcharging)

Question 10

Main Res pressure when Towing cock is used?

Answer 10

700 kPa

(This will cause uncouple light to flash in all cabs)

Gauges in all other cabs on Siemens will show normal MR pressure (850-1000)

Question 11

What are the 2 valves on the B side of a coupler?

Answer 11

Extend Air
Retract Air

Question 12

What can we check to ensure correct coupling ?
(Nuts and dicks)

Answer 12

Dick is in
Nut is out

Question 13

What is the purpose of the manual valve on the coupler?

Answer 13

To completely isolate the whole pneumatic system of the Dellner coupler

Question 14

What is the purpose of the extend air valve on the coupler?

Answer 14

Stops the electric coupler doors from opening when coupling

Question 15

What is the purpose of the manual valve retract air on the coupler?

Answer 15

Stops the doors from retracing when uncoupling

Question 16

What is the purpose of the rip cord on the coupler?

Answer 16

Allows for mechanical uncoupling (not used by drivers unless emergency )

Question 17

What is the purpose of the electrical coupler handle on top of coupler?

Answer 17

Allows for manual electrical uncoupling (not used by drivers) to uncouple)

Question 18

What is the purpose of the resistor grids?

Answer 18

Used for ED braking
They dissipate heat and energy that cannot be returned to overhead wires

Question 19

What does traction Inverter do?

Answer 19

Converts 1500 v DC to Variable 3 phase AC for the traction motors

Controls the operation of the Holding brake

Question 20

What is inside the High Voltage Container?

Answer 20

Motors : RHS - HSCB & Ground switch
LHS - BCU

Trailers : RHS - AUX eq.
LHS - BCU

Question 21

What does the Brake Control Unit do? (BCU)

Answer 21

It sends electrical signals to the Brake Module to apply / release brakes with pneumatic pressure

It sends electrical signals to the Traction Motors for ED braking

Question 22

Where are the brake Modules located?

Answer 22

Near wheels 3 & 7

Question 23

What functions does the Brake Module perform? *

Answer 23

Acronym : SPACE in BW

S- service braking
P - park brakes
A - air suspension system
C - cleaning air supply to brakes
E - EMY braking
B - brake blending
W - wheel slide control

(All things to do with air supply to the wheels)

Question 24

Where are the sanders and the sanders I. C.?

Answer 24

Sanders: wheels 3 & 6 on motors
I.C . A side of motors near the brake module

Wheels 2 & 3; 6& 7 on T cars
I.C on B side of T cars
Next to battery container

Question 25

Where is the Main res located?

Answer 25

No 2 end on both M and T cars

Question 26

What does the air compressor supply air to?

Answer 26

Braking and suspension systems

Question 27

How do you know if compressor pressure switch is isolated?

Answer 27

It is visible - it sticks right out at a 90 degree angle When not isolated it cant be seen

Question 28

Where is the self excite button?

Answer 28

On the Static inverter container T car A side

Question 29

What do SIVS do?

Answer 29

Convert 1500vDC to 400vAC (3 phase) as well as 230 v AC (single phase) Then converted further to 110v DC to charge batteries, Safety Loop & other safety critical functions

Question 30

What is the purpose of the self- excite button?

Answer 30

It allows for manual start up of the Static inverter when not enough battery supply

Question 31

What is Auxiliary container for?

Answer 31

It contains control equipment for the SIV system & BCU for the trailer car

Question 32

Battery box location and purpose? *

Answer 32

T car B side 4 doors 8 batteries inside (2 per door) Used for auxiliary power supply * Used to raise pantos step light Cab light When train is stabled

Question 33

How are pantos raised? What power? * Electrically Pneumatically Mechanically ?

Answer 33

Electro mechanical

Question 34

What is the transition couple locked with & it’s location?

Answer 34

T car 5p paddlock

Question 35

What does the sanders I.C isolate?

Answer 35

The compressed air from going to the sanders box

Question 36

How do we reset the trip?

Answer 36

Key in and on Trip lowered light illuminates Put reverser to a driving position MC to 0 (coast)

Question 37

How do we bypass the trip if it fails?

Answer 37

MC to B6 Selector to NEUTRAL Master key to OFF Key out Operate Trip bypass key switch to I Remove key Reactivate cab Check if EMY brake releases with selector to driving position & MC in O If it goes to holding brake then it ok Of not Safety loop must be bypassed also

Question 38

When will happen if the MC is in B1 or B2 when stationary?

Answer 38

The Vicers acknowledgement button will flash after 35 seconds

Question 39

How do we reset VICERS?

Answer 39

0 km/h MC in 0 Remain stationary for 10 sec Push VICERS button

Question 40

How do we isolate VICERS WHEN TRIP or Safety Loop is bypassed?

Answer 40

It self isolates in these situations

Question 41

When do we isolate VICERS with the key switch?

Answer 41

When A fault indicator remains illuminated A VICERS fault cannot be reset and train cannot move If FMP instructs driver to do so

Question 42

What indications do you get that VICERS has been isolated?

Answer 42

VICERS fault light illuminates

Question 43

If a local traction system fault light illuminates what CB has tripped?

Answer 43

Train stable HSCB Light control

Question 44

When testing VICERS on a prep how many times will the safety loop fault light flash (& BC rise to EMY pressure and lower to holding pressure) ?

Answer 44

2

Question 45

What indication will we get that Main res pressure has fallen to 700kPa? What would we check?

Answer 45

The red uncouple button flashes in all cabs Check Towing cock