The MCB is a type of switch which protects the system from overloaded current whereas the MCCB protects the system from over temperature and short circuit current.Thus, disconnected the circuit from the main supply and protects the equipment from damage. But as the current rises beyond the predefined value, then their contacts will warm and expand until the contacts are open. It consists bimetallic contact which expands and contracts when the temperature of the MCCB changes.ĭuring the normal operating conditions, the contact allows the current to flow through the circuit. One for the over temperature and the other for the over current. The MCCB has a manually operated switch for tripping the circuit. It is mainly used for high current applications. The current rating of MCCB is up to 2500 amps. It is mainly used in a place where adjustable tripping requires. It is a protecting device which protects the circuit from overloading. The MCCB stands for moulded case circuit breaker. When the current increases from the predefined limit, their movable contacts are disconnected from the fixed contacts which make the circuit open and disconnects them from the main supply. It has two contacts one is movable, and the other one is fixed. Their main function is to protect the equipment from overcurrent. The working principle of the miniature circuit is very simple. It easily senses the overcurrent caused by the short circuit. The miniature circuit breaker is an electromechanical device which, automatically, switch off the circuit whenever the abnormal condition occurs.
Protects the equipment from over temperature and fault current.Īvailable in single, two and three versions.Īvailable in single, two, three and four versions. Type of switch which protects the system from overloaded current.
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