WHAT IS THE DIFFERENCE BETWEEN UNDERVOLTAGE COIL, CLOSING COIL AND SHUNT TRIP

WHAT IS THE DIFFERENCE BETWEEN UNDERVOLTAGE COIL, CLOSING COIL
AND SHUNT TRIP COIL OF AN ACB?

Question Posted / prateek

2 Answers
40515 Views
Alstom, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

WHAT IS THE DIFFERENCE BETWEEN UNDERVOLTAGE COIL, CLOSING COIL AND SHUNT TRIP COIL OF AN ACB?..

Answer / karna

Under voltage coil means it will energized when supply
available, closing coil means it will operate when we are
giving closing command at that time it will operate , shunt
trip means it will operate when we are giving trip command
manually or through fault. CLOSING COIL OPERATE MEANS WE
WILL GET OUTPUT SUPPLY FROM THE ACB TERMINALS , SHUNT TRIP
COIL OPERATE MEANS IT WILL DISCONNECT THE OUTPUT SUPPLY OF
THE ACB TERMINALS. IF UV COIL USED IN ACB MEANS WITHOUT
INCOMING SUPPLY WE CAN'T CLOSE THE ACB.

Is This Answer Correct ?

59 Yes

4 No

WHAT IS THE DIFFERENCE BETWEEN UNDERVOLTAGE COIL, CLOSING COIL AND SHUNT TRIP COIL OF AN ACB?..

Answer / nirmalraj

cc used for closing the breaker contact, tc used for trip/open
the breaker contact and uv coil used for spring charge
interlock. if no supply manual spring charge is possible,
supply is present manual spring charge is not possible

Is This Answer Correct ?

12 Yes

8 No

Post New Answer

More Electrical Engineering Interview Questions

What is the function of the auto reclosure relay?

1 Answers

what is the use of vcb & isolator in substation?

4 Answers

how to size a diesel generator set?

1 Answers

please design a rectifier with batteries for below requirement and also explain how you calculate this solution, Load = 700Amp DC Backup time = 6 hour. please explain briefly ?????

1 Answers GNFC,

what is the different between DC & AC load Line.

1 Answers Emarat,

what is the working principle of tube light?

2 Answers

15hp,380v,31amp,3-ph submersible motor run at 250v what is The temperature rise of submersible motor

1 Answers

1.why is +1+1=+2 why cant it be +3 2.Why is +1*-1=-1 why cant it be something else 3.why are the hilly areas more cooler than the ordinary areas?

5 Answers ThyssenKrupp,

On a 10 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 65 AH). What Shall be the current rating of DC MCB ?

6 Answers RR, TNEB Tamil Nadu Electricity Board,

where induction generator is used ?

1 Answers

which calss ct's,pt', use protection,meatering and others

1 Answers

In TNC switch, is there any 1NO+1NC block ? and if we move over closing position, is ther any affect on trip position or vice versa?

0 Answers

For more Electrical Engineering Interview Questions Click Here