| 摘要 |
<p>The circuit arrangement includes a power circuit 62, with a first switch 2 in series with a power semiconductor 632, and a control circuit 63, with a second switch 3. Current in the power circuit 62 will only flow once switch 2 is actuated and switch 3 is then actuated so that the power semiconductor 632 operates. The power semiconductor may be a bipolar transistor, MOSFET, TRIAC, IC, or IGBT. Actuating the switches in this order prevents arcing in the contacts of first switch 2. Deactivation is in the reverse order also to prevent arcing the contacts of first switch 2. An actuating means (1, figure 2) is used to close switches 2 and 3 in the correct sequence.</p> |
