| 摘要 |
An overvoltage protecting device (1) for high voltage has a porcelain housing (2) with protective screens (3, 4, 7, 8). Protective screens (3) with a larger diameter may alternate with those (3) with a smaller diameter in the central region along the longitudinal axis of the device (1). At its ends, the device (1) has blow-out apertures (5) from which gas under high pressure can pass in the event of a short-circuit current. To protect the protective screens from damage, those (7, 8) closest to the blow-out apertures (5) have a smaller diameter than the others. |
