Three-phase alternative current solid-state relay circuit with current leakage protection and wide voltage range control

The present invention relates to a three-phase alternative current solid-state relay circuit with current leakage protection and wide voltage range control. The present invention includes a light-separation three-phase wide voltage switch drive circuit and a three-phase current leakage protection circuit, and specifically includes an A-phase optocoupler IC1, a B-phase optocoupler IC2, a C-phase optocoupler IC3, a A-phase triode VT1, a B-phase triode VT2, a C-phase triode VT3, a reverse-blocking thyristor VT4, a A-phase bidirectional thyristor VT5, a B-phase bidirectional thyristor VT6, a C-phase bidirectional thyristor VT7, a residual current sensor SC1, a left forward diode D1, a left negative diode D2, a right forward diode D3, a right negative diode D4, and the like. The present invention can fully meet switch control on the three-phase alternative current solid-state relay circuit with a wide range of control voltages, and a reliable real-time protection requirement for a current leakage fault of a three-