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MCCB VS ACB
MCCB-molded current circuit breaker
ACB - air circuit breaker
ACB and MCCB are used to ensure safety in electrical system from any over / breaking current.
ACBs are usually seen on upstream side of circuit & MCCBs on load side control (usually, load side switching operations are more frequent than upstream). Depending upon the operating voltages and level of protection(Fault Level) needed for the system ,these three protection device are selected. As the technology has improved over the period of time, the rating & breaking capacities of MCCBs are increasing - hence there is possibility of overlap in application of ACB & MCCB.
Here some of comparison between both of them for your reference!
choose wisely, here are tips to consider for your decision making !