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Question
what is the difference in MCB, MCCB, RCCB, ELCB, & MPCB 
(motor protection circuit bracker)
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
mcb : miniature circiut breaker.
mccb : metal clad or moulded case circuit breaker.
rccb : residual current circuit braeker.
elcb : earth leakage circuit breaker.
mpcb : motor protection circuit breaker.
 
Is This Answer Correct ?    363 Yes 44 No
Sukhvinder
 
Answer
# 2
MCB - Miniature Circuit breaker, is having overload and
s.c. protection & used in domestic application

MCCB - Moulded case Circuit breaker, is having overload and
s.c. protection & used in Industrial application & Having
high s.c. capacity

RCCB : Residual current operated circuit breaker, is used
for protection against electric shock

ELCB : Earth leakage circuit breaker & is same as RCCB

MPCB : Motor protection circuit breaker, is used for
protection of motor, having s.c. and overload protection
more effective to protect motor
 
Is This Answer Correct ?    290 Yes 27 No
Prajapati
 
 
 
Answer
# 3
Prajapati's answer is good.

ELCB is actually voltage operated and need a stable
connection to earth electrode.

RCCB is actually seeing the difference in the current
flowing in and out of the circuit. If there is a leakage,
the sensing circuit will detect the leakage and trigger the
RCCB to trip.
 
Is This Answer Correct ?    61 Yes 10 No
Nn Duc
 
Answer
# 4
If RCCB is same as ELCB, can we use ELCB where RCCB is
specified.
 
Is This Answer Correct ?    87 Yes 39 No
Pradeep
 
Answer
# 5
mpcb has an inbuilt contactor and relay.so need for
external contaectors and relays. mccb ther is no contactor
and relays, we have to provide.


MCB (Miniature Circuit Breaker)-rated current not more than
100 A. Trip characteristics normally not adjustable.
Thermal or thermal-magnetic operation. Breakers illustrated
above are in this



An Earth Leakage Circuit Breaker was the first name given
to what is now called a Ground Fault Circuit Interrupter
(GFCI) . The original type of ELCB or GFCI was designed
only to detect a current flowing in the safety "ground"
or "earth" wire.


A Miniature Circuit Breaker. An MCB is a device designed to
protect a circuit's wiring from the serious damage which
would be caused if it has to carry a current which is too
high for the diameter of its wires. Such a current could
easily heat up the wires so much that their insulation
melts. If that situation were allowed to develop further it
would soon cause the wires in a cable to short out and to
burn so hot that they could easily cause a house fire.
 
Is This Answer Correct ?    39 Yes 7 No
Prit
 
Answer
# 6
Mcb: miniature circuit breaker comes with max. 100A/10kA
rating earlier but but now it is available for 125A/16kA
rating. Based on thermal mechanism breaks the circuit under
short circuit condition.
Mccb: moulded case circuit breaker comes with upto
1000A/25kA rating. Based on thermal mechanism for overload
protection of load and magnetic mechanism for instant
tripping during short circuit.
Rccb: residual current circuit breaker, basically a kind of
ELCB which determines the difference between line and
neutral current,whenever it crosses the set value it trips.
Normally used in 3 phases while its single phase version is
known as RCD.
ELCB: earth leakage circuit breaker, basically used in DB
incomer is of two types, current operated and voltage
operated. In case of voltage operated one,the difference of
potential is measured between grounded spikes and terminal,
while in case of current operated one, you can call this a
RCCB.
MPCB: motor protection circuit breaker consist of separate
contactors used for protecting motors under over current
condition,which is generally caused due mechanical issues
of motors.
 
Is This Answer Correct ?    20 Yes 5 No
Souvik Ghoshal
 
Answer
# 7
MCCB and MCB is for over load protection and Earth Fault protection.MCCB is for heavy duty ie it with stand more fault current.
RCCB is only for Earth leakage protection

ELCB will protect Overload, short circuit,Earth leakage and used where the fault current is more
 
Is This Answer Correct ?    23 Yes 15 No
Ashok
 
Answer
# 8
MCB - Miniature Circuit breaker, is having overload and
s.c. protection & used in domestic application

MCCB - Moulded case Circuit breaker, is having overload and
s.c. protection & used in Industrial application & Having
high s.c. capacity

RCCB : Residual current operated circuit breaker, is used
for protection against electric shock

ELCB : Earth leakage circuit breaker & is same as RCCB

MPCB : Motor protection circuit breaker, is used for
protection of motor, having s.c. and overload protection
more effective to protect motor
 
Is This Answer Correct ?    4 Yes 1 No
Suresh
 
Answer
# 9
mcb Miniature circutebraker will protect a circuit's wiring
from the serious damage which
would be caused if it has to carry a current which is too
high for the diameter of its wires. Such a current could
easily heat up the wires so much that their insulation
melts. If that situation were allowed to develop further it
would soon cause the wires in a cable to short out and to
burn so hot that they could easily cause braker is for
protect over load
An Earth Leakage Circuit Breaker was the first name given
to what is now called a Ground Fault Circuit Interrupter
(GFCI) . The original type of ELCB or GFCI was designed
only to detect a current flowing in the safety "ground"
or "earth" wire.
rccb (recidential current circute braker function is same
elcb
 
Is This Answer Correct ?    4 Yes 4 No
Rajesh Achuthan Nair Kumaramka
 
Answer
# 10
example phase wire is going on the tube light.if that phase wire touch in earth mccb will trip automatically. 
Is This Answer Correct ?    16 Yes 17 No
Prawin
 

 
 
 
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