Electrostar Traction

Question 1

M O S L
Meaning

Answer 1

Motor open standard lavatory

Question 2

P T O S L

Answer 2

Pantograph trailer open standard lavatory

Question 3

D M O S

Answer 3

Driver motor open standard

Question 4

4 car
Dual
Retractable

Answer 4

375.6
377.5

Question 5

Which class
3 car DC fixed

Answer 5

375-3
377-3

Question 6

Which class
4 car. Dual voltage. Retractable shoes

Answer 6

375-6
377-5

Question 7

4 car
DC
Fixed

Answer 7

375-7
377-1
377-3
375-3

Question 8

Which class
4 car DC. Retractable +. Anti icing or high density seating

Answer 8

375-8
375-9

Question 9

ACM
3 different voltages and what’s used for each

Answer 9

110dc. Batteries , emergency lighting , control feed

240ac. Janitor sockets , body side heaters.

415ac. HVAC. Compressor (local & remote)

Question 10

DMOS drivers side
B B B M M B

Answer 10

Battery box
Brake frame
Brake control unit
Main circuit breaker
Motor converter module
Brake fan resistor

Question 11

DMOS non drivers side
A B C D E L (f/all) backwards

Answer 11

(Sand hopper)
(Back of brake resistor fan)
Line converter module
Earthing switch shoe gear
Do not touch- electrical connector gap
Contactor box (dc equipment)
Back of battery box
Auxiliary converter module

Question 12

M O S L.
Layout outside

Answer 12

Motor open standard lavatory

Non drivers side
Contacter box. line converter module (375-6 & 377-5 only)

Drivers side
Brake frame - brake control unit - main circuit breaker - motor converter module - brake fan resistor

Question 13

Body end cupboards MCBs x 4

Answer 13

1. Brake controls
2. Mitrac
3. Compressor local & remote (PTSOL only)
4. Auxiliary compressor (PTSOL only)

Question 14

376 name the 5 cars

Answer 14

DMOS /A, MOS/A, PTOS, MOS/B, DMOS/B

Question 15

Name the current limit index

Answer 15

4 car= 5
Max amount of coaches= 12
Max current limit index= 16

Question 16

If current limit index is exceeded

Answer 16

You are drawing to much power and tripping MCBs at substation, MDC will advise on any isolation of traction motors/ MITRAC

Question 17

Can you couple 375 and 376

Answer 17

Yes but only for assistance, electrical and mechanical with restrictions (max 75mph)

Question 18

How do you know that shoes have been lowered

Answer 18

The line light will illuminate

Question 19

When you have wheel slide how will sand be dispersed

Answer 19

Automatically when in brake step 2 3 and 4

Question 20

When would you raise shoe gear

Answer 20

Fire on PLU on train
Blowing substation breakers MCB
Damaged shoe gear

Question 21

Which electrostar has no WC

Answer 21

376

Question 22

Where are DSIC found in electrostars and which model differs and why

Answer 22

DSIC are found at the end of each coach in the body end cupboard

In 377 units with 1st class doors, the DSIC will be found in the drivers cab

Question 23

Coach names for 375 and 377 4 car

Answer 23

DMOS/A
MOSL
PTOSL
DMOS/B

Question 24

Coach names for 375 3 car

Answer 24

DMOS/A
PTOSL
DMOS/B

Question 25

Where do you reset toilet smoke alarms in 377

Answer 25

Trip and reset toilet MCB in body end cupboard

Question 26

Can networkers and electro stars be coupled together

Answer 26

Yes but need a schrader hose and a fitter with an adapter, mechanically only

Question 27

Can all electrostars be coupled together

Answer 27

Yes but 375 and 376 cannot use SDO Can be coupled mechanically and electrically but with restrictions

Question 28

What happens when you press emergency plungers on a 377

Answer 28

Collector shoes will raise, press shoes down to rectify

Question 29

When would you use a short circuit bar

Answer 29

1- anyone in contact or at risk of being in contact with the conductor rail 2- uncontrolled evacuation 3- fire arcing or smoke 4- other faults and failures

Question 30

What is different about 377 tail lights

Answer 30

They have an automatic tail light switch

Question 31

How do you access/ switch off on train cameras on a 377

Answer 31

Via Mitrac main settings

Question 32

What happens if the emergency cupboard in a 377 is opened

Answer 32

You receive a yellow B fault on Mitrac

Question 33

Which electrostars have SDO buttons

Answer 33

375s

Question 34

377 and 375 can they be coupled

Answer 34

No due to different operating systems on Mitrac

Question 35

Which side is BBBMMB

Answer 35

Driver’s side

Question 36

What is the current index limit on a 4 car train

Answer 36

5

Question 37

Which electrostars have no SDO function

Answer 37

377