| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a circuit which can cut off a high-voltage DC current while preventing arc discharge from occurring without using a DC exclusive switch.SOLUTION: There is provided a mechanical semiconductor element switch in which a current path 4 maintains conduction and becomes the main current path, forward bias is maintained at a control end 1, reverse bias is maintained at a control end 2, and arc discharge does not occur between contact points separated from a base point of a switch in a period in which the base point of the switch is not brought into contact with any contact point, in a case in which the contact points of the switch are switched in a state where the switch is electrically connected as a main current path of a high-voltage DC current by selection of contact points of the switch, forward bias is applied to the control end 1, and the current path 4 is electrically connected.</p> |
