Three-phase zero-voltage switching circuit using CA3058 zero-trigger integrated circuit

It is a three-phase zero-voltage switching circuit that uses zero- crossing trigger integrated circuit CA3059.
    The circuit includes a zero-voltage starting circuit that performs like a synchronous switch. The logic command is added to the three
integrated circuit zero-voltage switches through the photocoupler . When the logic command is turned off, all control stops, the bidirectional thyristor is automatically closed, and the sine wave current
is reduced to zero. After the first phase is disconnected, after a phase angle lag of 906, the other two phases are also disconnected.