Answer / harnath yadav

mcb is not avealeble set point
mccb is set point

Answer / mohan cp

MCB is not having the adjustment of protections like Over
Load, Short circuit, Earth fault and Instantaneous current,
but MCCB is having.

Answer / suhel

mcb is an younger brother of mccb which work with low load
compare with mccb.mccb can use like switch but mcb can not.

Answer / shrinivasa

MCB(miniature circuit breaker) is low current rating only
MCCB(molded case circuit breaker) high current rating only
applicable.

Answer / adeeth

mcb - basically used for domestic and Industrial
application very near to load end and rating not exceeding
100A and have a short circuit rating upto 18 KA.It uses
thermal trippin mechanism for protecting the load.

on the other end MCCB basically used in industrial
Application is more sensitive than MCB.ITs available from
10A to 2000A and Short circuit ratio from 10 KA to 200KA.IT
have both thermal and magnetic tripping function and
basically more sensitive than MCB.

Answer / p.s.negi

MCB is the miniature circuit breaker and its use to single
phase its tripped heavy current by short circuit or any
reason. MCCB is the moulded case circuit breaker and used
to three phase its tripped on heavy current flow single
phase or two phase and include three phasein moulded
case.both are safty protection.

Answer / p. naik

MCB is acircuit-breaker which can provide protection only
in the cases of shor-circuit.They can only be operated
manually. MCCB's have provisions for both under/over
voltages, it has provisions for motr mechonism to be fitted
on it, which allows us to operate them electrically. MCCB's
have chnge over(NO & NC)contacts for both SD(faults) and SDE
(electrical faults) which can be utillised for providing
fault indication lamps. MCCB's have higher ratings than
MCB's. MCB's of diffrent types are B-curve(lighting
loads),C-curve(motors),D-curve(capacitive).Both operate in
almost a simillar manner having a fixed & moving contact,
but MCCB's been with more "ACCESSORIES".

Answer / kurinji

MCB is used where ever there is an balanced current flow in
three phase, it will maloperate in unbalanced load condition

But MCCB is used in place of high rating current and also
in place where there is unbalances in current it will
operate correctly in this condition

Answer / blake australia

From what I recall:
-MCB is a main circuit breaker, which can be any type of
circuit breaker
-MCCB is a Metal Clad Circuit Breaker, which is generally
rackable from its slot and typically used for breaking much
larger loads.

what is REF relay?

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