Circuit Breakers - Comparing MCCBs to ACBs

With technological development a new version of circuit breakers were introduced with moulded case which were initially having only very low load break capacity.They were much cheaper and use and throw type and could be used for only limited number of operations.

With further development in technology, the at present day MCCB are designed with larger make and break capacity and fault withstand capacity. As stated by Baby Guinness now MCCB with capacity of 3200 A and breaking capacity of 200KA with all control benefits and dependable quality are available from reputed manufacturers. They need less space in the panel compared to ACB.

ACB has robust enclosure, draw out facility, sliding shutters and capacity to withstand many break and break operation with out damage and proven technology. ACB is still preferred for on load switching operation of 800 Amps and higher systems."