![]() Since the output of the CBCT will be vector sum of the phase and neutral current. The phase wire and neutral wire will be passed through the CT. It is working under principle of core balanced current transformer. Due to, increase in temperature of the bimetallic strip get bend, this activate the tripping mechanism. ![]() when the current flow through the conductor increases, which increases the temperature of the conductor. Principle of thermal overload protection. Yes, It is used to protect the electrical circuit against Earth Fault No, It does not protect against earth fault RCCB consists of CBCT (Core Balanced current Transformer), Magnetic relay coil, incoming and outgoing terminal and tripping mechanism Miniature circuit breaker consists of Body of MCB, Incoming Terminal, Magnetic Coil, Bimetal Strip, Arc Chute, Copper Braid, Operator ON/OFF handle etc. Learn More: Top 7 Difference Between Contactor And Relay Inside RCCB:
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