| 摘要 |
<p>The disclosed switch is provided with: a bi-directional semiconductor switch element transistor structure (51), which is connected in series between a first input-side terminal (21), that is connected to a power source (2 or 3), and a first output-side terminal (41), that is connected to a load (4); a commutation unit (6), that is connected in parallel between the first terminal (21) and a second input-side terminal (22); a power source unit (7) for converting voltage output from the commutation unit (6) to a stable, predetermined voltage; a control unit (8) for controlling, by means of the electrical power supplied by the power source unit (7), the entire switch for both AC and DC use; and a drive unit (9) for making the bi-directional semiconductor switch element (51) conductive, according to a control signal from the control unit (8). Thus, the switch for both AC and DC use can be used in either an AC distribution system or a DC distribution system, can be switched without arcing when used in a DC distribution system, and can easily be substituted for an existing AC distribution system switch.</p> |
