CFB3-125WGF PV grid-connected circuit breaker is a derivative of the CFB3-125W circuit breaker. It is a miniature circuit breaker with automatic reclosing function designed for photov-oltaic grid connection. It is suitable for AC 50Hz, rated current to 125A, mainly used with photovoltaic system. It can solve the problem of automatic closing of pressure detection and automatic opening of voltage by voltage loss, effectively solve the islanding effect and overload the power supply line and Short circuit protection.