150 MCBs

Question 1

How many C/Bs on top row of MCB?

Answer 1

11

Question 2

Name C/Bs on top row

Answer 2

Fire System; TCA; RETB; Earthing; Local Control; Door Control; Brake; TPWS; Train Control; Public Address; Remote Supply Control

Question 3

What happens if Fire System MCB trips?

Answer 3

Automatic fire integrity will be lost and yellow light extinguish. Engine on affected car will shut down.

Question 4

If Fire System MCB will not reset what must be done?

Answer 4

Affected engine must be isolated.

Question 5

Can the train continue in service, if so what would happen if the affected engine caught fire?

Answer 5

Yes train can continue. If affected engine caught fire then only the manual extinguisher would work.

Question 6

What are the indications if the TCA c\b trips?

Answer 6

TCA lost on affected vehicle
Body side indicator illuminated.
Gearbox ‘train’ and ‘unit’ light illuminate
TCA operative when lit lamp extinguish
TCA fault lamp illuminate

Question 7

When does the Earth C/B often trip?

Answer 7

When coupling

Question 8

How many times should reset be attempted on earth c/b?

Answer 8

Once

Question 9

What must be done if Earth c/b trips again?

Answer 9

Defect book completed. Train can continue in service if no other faults.

Question 10

What are the effects of the Local control c/b tripping?

Answer 10

TCA fault light illuminates
Engine shut down on affected vehicle
Engine stop light will not illuminate
Fire protection will be lost on affected vehicle
The starter motor will not function and allow engine to be restarted

Question 11

What needs to be done if Local Control c/b cannot be reset?

Answer 11

Isolate affected engine
Proceed as if TCA fault was present due to illuminated body side indicator.
Contact signaller and maintenance control.
Apply DOTE standard

Question 12

What happens if Door Control c/b trips on vehicle where DKS is on?

Answer 12

Door close buttons will not work

Question 13

If Door Control c/b will not reset what needs to be done?

Answer 13

DKS needs to be switched off, control transferred to DKS in other vehicle.

Question 14

If door system operates correctly from new location what may happen?

Answer 14

Train may continue normally until the next point that maintenance can be provided.

Question 15

If Brake c/b trips what are the signs?

Answer 15

Brakes apply on full formation
Engines revert to idle
Bodyside indicator illuminates on affected vehicle.

Question 16

If Brake c/b will not reset what must be done?

Answer 16

Move to other driving cab and raise EBS in order to release brakes.
Obtain assistance from leading end and operate EBS in leading end of assisting vehicle

Question 17

What happens when the TPWS c/b trips?

Answer 17

Emergency brake application

Question 18

If TPWS c/b will not reset what must be done?

Answer 18

TPWS flag isolation switch to be operated to regain brake control. This will also isolate AWS warning system.

Question 19

What are the effects of a tripped Train Control c/b in leading cab?

Answer 19

Brake application
Engine remains running
No buzzer
No train or unit fault lights

Question 20

If train control trips in the other cab what are the effects?

Answer 20

Same as in the leading cab with the exception of train and unit lights being illuminated.

Question 21

What are the options if the Train Control c/b will not reset?

Answer 21

Isolate engine on affected car and try to reset.
Move to alternative driving cab and operate EBS.
Obtain assistance from leading end and operate EBS in leading end of assisting unit

Question 22

If an engine is isolated on an end cab due to a Train control c/b not resetting what needs to be operated.

Answer 22

Remote supply changeover switch will need to be operated on that end to ensure end lighting is functional.

Question 23

Why would the Remote Supply c/b trip?

Answer 23

If the main start battery control fuse on the opposite end of the unit ruptures.

Question 24

What happens if the fuse ruptures?

Answer 24

Emergency brake application
Engine on affected end will shut down
All electrical supply lost from start battery

Question 25

What needs to happen if remote supply will not reset?

Answer 25

Unit is a failure and assistance will be required.