HIGH SPEED AUTOMATIC CIRCUIT BREAKER FOR PROTECTION

A high-speed automatic circuit breaker for protection is provided to intrinsically prevent the power stoppage of a circuit from being generated due to an operation of a recloser, caused by an accident, by operating only the circuit breaker. A high-speed automatic circuit breaker for protection includes a circuit breaker body and a circuit breaker controlling unit(20). The circuit breaker body induces power from the power line by a fixed contact coming in contact with a moving contact. The circuit breaker body has a Rogowski coil(14) for detecting current and a resistive voltage sensor(15) for detecting voltage in a single body. The circuit breaker operates the moving contact by an open coil according to a trip control signal to perform the tripping process and applies power by operating the moving contact according to an injection control signal. The circuit breaker controlling unit(20) is applied with a current detecting signal flowing on the drawing path from the Rogowski coil(14), is applied with the voltage detecting signal of the drawing path from the resistive voltage sensor(15), and generates a control signal for controlling the circuit breaker body.