Answer / b.manikandan

MCB
* MCB means miniature circuit breaker.
* MCB trip current may be not adjustable in the small
ratings.
* MCB can used low current is not more then 100amps.
* MCB is used for single phase suply only.If we want mcb
for three phase suply we can use 3 mcb.
MCCB
* MCCB means moulded case circuit breaker.
* MCCB trip current may be adjustable in larger ratting.
* MCCB can used higher current areas more then 100amps.
* MCCB is used three phase suply only.

B.MANIKANDAN

Answer / abhishek tiwari

MCB (Miniature Circuit Breaker)—rated current not more than
100 A. Trip characteristics normally not adjustable.
Thermal or thermal-magnetic operation.

MCCB (Molded Case Circuit Breaker)—rated current up to 2500
A. Thermal or thermal-magnetic operation. Trip current may
be adjustable in larger ratings.

Answer / aniket

one thing that everyone forgot is mccb is used for 3 phase
only an d mcb is used for single phase.if we want mcb for
3phase we use 3 mcb.also mccb is more accurate

Answer / vishnu dayal

MCB is miniature circuit breaker which is thermal oprated
and use for short circuit protection in small current
rating circuit and single phase use .

MCCB moulded case circuit breaker and is
thermal operated for over load current and magnetic
operation for instant trip in short circuit condition.under
voltage and under frequency may be inbuilt. Normally it is
used where normal current is more than 100A.and use for three phase use..

Answer / khan

mcb is a maniature circuit breaker is carrying up to 63A
maximum.
while MCCB module case circuit breaker is carrying min 63A
normaly MCCB is input & MCB is output

Answer / laxmidhar panda

MCB STANDS FOR MINIATURE CKT BREAKER WHERE AS MOULDED CASE
CKT BREAKER FOR MCCB.MCB IS MOSTLY USED IN MINIMUM CURRENT
CKT AND MCCB IS USED IS MORE THAN 63AMP FULL LOAD
CURRENT.MCCB USED AS A INCOMER WHERE AS MCB MOSTLY USED AS
OUTGOING.BRECKING CAPACITY OF MCCB CAN BE EXTENDED WHEN
EVER REQUIRED BUT NOT POSSIBLE IN MCB

Answer / pakkaran

confusing . just go and see wikipedia, its there , or else
read CHESNEY BOOK . CLEARLYY U CAN SEE THAT K

Answer / rakesh

MCCB HAVE HIGH BREAKING CAPACITY BUT MCB LOW SO WE CAN USE
MCCB AS HIGH FAUL LEVEL OF TRANSFORMER & MCB CAN USE
DOMESTIC PURPOSE ONLY

Answer / ishara

Today MCCB & MCB ripping mechanisms are not different. Their are Thermal & Magnetic protection available in both units.

I think, MCCB & MCB are same electrical functional units

Answer / subir kumar manna

MCB IS A MANUATURE CIRQUITE BREKAR THATS FUNTION ARE OVER
LOAD TRIPPING AND SHORT CIRQUITE PROTECTION . THERE ARE
CAPACITIYS UP TO 63AMPS .
MCCB IS A MOULDED CASE CIRQUITE BREAKER, THERE FUNTION ARE
OVER LOAD TRIPPING , SHORT CIRQUITE PROTECTION ,UNDER
VOLTAGE AND UNDER FREQUENCY , EARTH FOULT TRIP ,THERE
CAPACITYES IS THREE PHASE HIGH VOLTAGE CURRENT CARRING .

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