Answer / sayan

MPCB:Motor Protection Circuit Breaker, which performs the
same function as that of an SFU.
MCB:Miniature Circuit Breaker, It also functions as a short
circuit prevention device. It can be 1,2,3,4 poles
depending on the requirement.

Answer / vinod

MPCB: all the bove full form are correct.
its also an breaker with inbuilt overload protection.
as per the cordination in the panel after contactor OLR is
needed to be provided.if we are using MPCB there is no need
for overload relay.

MCB: Minature circuit breaker.
this limit it is available up to certain breaking
capacity.can be used for lower breaking capacity

Answer / ravikant sahu

MPCB : Motor Protection Circuit Breaker.It is protect from
over load,Short circuit & Single Phasing also.

MCB : Miniature Circuit Breaker give protection from over
load & short circuit Only.

Answer / jayaseelan

mcb
thermal overload,sort ckt protection
mpcb
thermal overload,sort ckt protection,olr adjustment

anyother answers welcome...

Answer / dharmendra

MPCB have selectable range.
MCB has fixed ratting.

Answer / naveen kr.mishra(03-08-1987)

Hi friends, The every answer are correct but no body wrote
about the single phasing protection that is second portion
of Question clearly.
Answer-
MPCB will not protect to motor during single phasing
accuratly.It can do moulfunction during single phasing.
So normally MPCB dose do sufficient for single phasing.
Thanks

Answer / supreet virdee

Basically MPCB is used to protect motors from malfunctionng
and from overload whereas MCB does not work on three phase,
provides insufficeint protectin by only tripping the
cirrcuit.
MPCB can be used on three phases R,Y,B and provides full
protection to the motor n avoid it from burning.

Answer / atul

The question is still not clear to me......
as.
1). MCB protects from overloadin,short circuit..
2). MPCB protects from overloading,short circuit and motor disconection...in all of the above cases it will trip....nd moreover the main dfrnc btwn mcb nd mpcb is dat mpcb is provided with auxiliary cntacts(normally open nd normally closed)basically mpcb is connected with cntactors to provide two cmponent starting.......nd mpcb ranges r variable it can be set from frnt bt mcb is set for a fixed rating....

Answer / saleem

MPCB:Motor protection circuit breakar(3 phases)
MCB:Meniator circuit breakar (Single phase)

AC is the magnitude of sinosudial-wave but we use cose value to determine power factor instead of sine value.

2 Answers  

The neutral to earth connection in my industry is showing a zero reading (shorted). I have a machine which has to be installed where neutral to earth is not shorted and shows a leak voltage <3 Volts. Please suggest me how it is possible.

6 Answers  

What is SMPS,How does it works?

4 Answers   Bharti, TCS,

what is load which is indicated in power plant generation panel? in any power plant

1 Answers  

Due to ferranti effect which power increases at the receiving end?active power or reactive power?

5 Answers  

how can we change the phase angle b/w two phase?

2 Answers  

why a diode bridge is provided in vcb control circuit ?

2 Answers  

What is min and max voltage between earth and neutral/phase if it perfect earthing?

37 Answers   Epoch, ISS, ITC Infotech, L&T, Power Works, Statex, Sterlite, Wipro,

what type of earthing is done on hilly rocks.

4 Answers  

What is Difference Between static & Dynamic Pressure of Fan & Blowers

2 Answers  

What is the lockout relay

0 Answers  

why would the rotor rotate at sub synchronous speed against the direction of rotating flux when d rotor of 3 phase IM is connected to 3 phase balanced supply and the stator windings are shortcircuited ??

0 Answers