what is the diff of mcb and mccb

Question Posted / kadher.304

2 Answers
6613 Views
NSN, Sterling Wilson, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what is the diff of mcb and mccb..

Answer / desingurajan

MCBs are miniature circuit breakers with optimum protection facilities of overcurrent only.These are manufactured for fault level of up to 10KA only with operating current range of 0.5 to 63 Amps (the ranges are fixed), single,double and three pole verson.These are used for smaller loads -electronic circuits,house wiring etc.
MCCBs are Moulded case Circuit breakers,with protection facilities of overcurrent, earth fault.it has a variable range of 50% to 100% operating current.They can be wired for remote as well as local operation both.They are manufactured for fault levels of 16KA to 50KA and operating current range of 25A to 630Amps.They are used for aplication related with larger power flow requirement.

Desingh
RAjapalayam

Is This Answer Correct ?

16 Yes

0 No

what is the diff of mcb and mccb..

Answer / kadher.304

mcb its thermal operated and use for short circit rating of
mcb 63amp(max)
mccb is thermal operated for over load current and magnetic
oprataion for instant trip in short circuit condition.rating
of 63amp(9min)

Is This Answer Correct ?

7 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

What is meant by earthhing of a magnetic flow meter and when to use empty pipe detection?

0 Answers

In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?

0 Answers

Can you explain about pole discrepancy scheme

0 Answers NCC,

What is formula calculation size cable wire ?

0 Answers

what is resistor

9 Answers

6.6 KV /.415KV Step down trf. we can get 6.6 KV from primary by applying .415 KV secondary side by same TRF.

3 Answers Suzlon,

Is there thumb rule to calculate how many Insulators to be used for Transmission line of different volatges

3 Answers CS,

is there any current and voltage drop on liquid resistance starter water/soda tank ?

0 Answers

HOW DO I CALCULATE THE SETTINGS FOR THE DIFFERENTIAL PROTECTION OF A 12kV/6.6kV, 6MVA,DYN11 XMER WITH PRIMARY SIDE CTR 400/1 AND SEC SIDE CTR 600/1?

0 Answers Adhunik,

What is the difference between acs 550 & acs 850

0 Answers Madhucon,

How voltage step down is done?

3 Answers IOCL,

what should be correct gas pressures to be a 1.5 ac unite

0 Answers DDK,

For more Electrical Engineering Interview Questions Click Here