The handle will move to the middle or OFF position. Before resetting, inspect the circuit for any faults. Once confirmed safe, manually switch it back to ON.

Not recommended. MCBs are designed for protection, not for frequent switching. Repeated manual use will reduce mechanical life.

Common causes include : Overloaded circuit、Short circuit or fault in wiring、Faulty connected equipment、Wrong MCB selection (rating or curve type).

No. MCBs only protect against overload and short circuits. For earth leakage protection, use RCCB (Residual Current Circuit Breaker) or RCBO (combination of MCB + RCCB).

Select appropriate rating and trip curve.
Regularly inspect terminals and contacts.
Avoid using as a switch.
Investigate frequent trips instead of resetting blindly.