| 摘要 |
<p>An overvoltage protector disconnects a device (31) to be protected from a voltage source (V1) by breaking an electric circuit by a semiconductor switch (S1) connected in series with the electric circuit when an overvoltage or overcurrent is detected (B1, B3). The electric circuit may again be quickly closed when the overvoltage or overcurrent has subsided, so that the breaking does not influence the operation of the device to be protected. The voltage across the semiconductor switch is monitored by a zero voltage detector, the switch is closed again and the device to be protected is reconnected to the supplying voltage source when the voltage across the switch (S1), according to measurement (B2), is zero.</p> |
