| 摘要 |
Overvoltage arrester having a gas-filled housing wherein, spaced from one another by a tubular insulator, cylindrical electrodes ending frustoconically are disposed opposite one another and are formed, in a region of active surfaces thereof, with walls that are thicker than conical side walls thereof located in a region of transition to the insulator, at least one line of electrically conductive material being disposed at the inner surface of the tubular insulator and extending as an ignition line in direction from the one cylindrical electrode to the other, the electrodes and the insulator being receivable in a metallic sleeve acting as a socket at ground potential and having a movable surrounding cage, including a metallic sleeve for receiving the electrodes and the insulator, the sleeve serving as a socket and having a movable cage substantially concentrically and closely surrounding the electrodes and the insulator, one of the electrodes being a wire or pin electrode and the other electrode being a hollow electrode and having a rear space wherein low vapor deposition occurs, the ignition line being electrically conductively connected to the one electrode and terminating in the rear space of the other electrode, the electrodes being disposed relative to one another so that an approximately equal spacing is provided between the electrodes and between the other electrode and the ignition line. |
