| 摘要 |
<p>The invention relates to a device for protecting electrical installations againstovervoltages. The inventive device comprises: at least first and second electrodes(2, 3), between which an electric arc (5) can be generated in a striking zone (6);a device (7) splitting for the electric arc (5), which is located at a distancefrom the striking zone (6); and focusing means (9) which are arranged to definea divergent space (10) for guiding the electric arc (5) from the striking zone(6) to the splitting device (7). The invention is characterised in that the focusingmeans (9) are formed such that the aperture angle (a) of the divergent space (10)increase, on average, between the striking zone (6) and the splitting device(7). The invention relates to overvoltage protection devices.</p> |
