ABB MOLDED CASE CIRCUIT BREAKERS (MCCB)

Molded case circuit breakers, or MCCBs, are electrical protection devices used to protect the electrical circuit from excessive current, which can cause overloads or short circuits. Molded case circuit breakers can be used for a wide range of voltages and frequencies with adjustable trip settings. The MCCB uses a temperature sensitive device (the thermal element) with a current sensitive electromagnetic device (the magnetic element) to provide the trip mechanism for protection and isolation. In addition to tripping mechanisms, MCCBs can also be used as manual disconnection switches in case of emergency or maintenance operations.

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