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MCB is used for high rating &MCB is used for lower
rating.What is technical difference between ACB & MCB?
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Answer Posted / c.r.shreedhar
MCB can carry small currents up to 100A and it is having
only thermal trip protection and breaking capacity of MCB's
are very less the maximum is 10KA, but ACB's can carry
large currents up to 6300A,breaking capacity of ACB's are
high the maximum is 120KA and it is having lot of
protections like under voltahe over voltage short circuit
and earth fault protections, user can adjest the protection
settings, most advanced feature of ACB's are communication
facility, user can monitor and set the parametrs from
remote and also he can download the history of faults with
day and time stamp. So, where ever ever user required high
grade of protection the only choice is ACB's.
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