Automatic change -over of no electric arc fast switch over

The utility model provides an automatic change -over of no electric arc fast switch over, including control module and two executable modules, the executable module is including the optoelectronic coupler unit, one -way silicon controlled rectifier drive unit, rectifier unit, the bidirectional thyristor unit that connect gradually, the bidirectional thyristor unit leaves the port that inserts the power, control module connects the opto -coupler unit. The utility model discloses realizing taking and carrying the no arc that opens circuit, the security increases substantially, restraines the conflagration, and switching time is extremely short, effectively protects the power consumption facility, and saved traditional actuating motor, not only the cost is reduced has still promoted the reliability.