what is the difference in MCB, MCCB, RCCB, ELCB, & MPCB
(motor protection circuit bracker)
Answers were Sorted based on User's Feedback
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 ? | 689 Yes | 63 No |
Answer / prajapati
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 ? | 581 Yes | 50 No |
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 ? | 150 Yes | 21 No |
Answer / pradeep
If RCCB is same as ELCB, can we use ELCB where RCCB is
specified.
Is This Answer Correct ? | 136 Yes | 59 No |
Answer / prit
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 ? | 70 Yes | 14 No |
Answer / souvik ghoshal
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 ? | 52 Yes | 10 No |
Answer / suresh
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 ? | 35 Yes | 7 No |
Answer / ashok
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 ? | 43 Yes | 24 No |
Answer / prawin
example phase wire is going on the tube light.if that phase wire touch in earth mccb will trip automatically.
Is This Answer Correct ? | 42 Yes | 27 No |
Answer / rajesh achuthan nair kumaramka
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 ? | 20 Yes | 8 No |
If you touch at the end welding machine, will you have shock ?
Describe the test procedure to determine the vector group
how could we findout the lightning arrester failed or not in live circuit? Is there any instrument to measure the high voltage at the time of sky lighting?
Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?
what is the circutor?why we use it ?
How does solar power system work?
why are using bus ducts ? why not using cables
at what basis/standard we have to arrive the current density of aluminium/ copper in busbar?
I AM A ELECTRICAL PANEL BOARD DESIGN ENGINEER.IF I GO ANY INTERVIEW ,TECHNICALLY WHAT ARE QUESTIONS I WILL FACE FROM INTERVIEWER?
WhY PF low at Time of PT Missing in HT Meter
What is transmittance?
what is PDU in transformer?? which company manufacture??