| 摘要 |
FIELD: electricity.SUBSTANCE: gas-discharge device contains opposed high-voltage (HV) electrodes separated by a discharge gap and installed in a sealed casing. A working section of at least one HV electrode is made as a layered metal structure of a basic high-conducting layer, a working metal layer and the second relative low-conducting metal layer placed on top of the basic layer surface, in a periphery, and the latter contacts the basic layer in the central part. The working section of the HV electrode is made of a high-conducting and erosion-resistant material, it has a diameter less than the basic layer, and it is connected axially symmetrical to the basic layer surface and has an electric contact with the low-conducting layer at the outer edge. The contact point with the second relative low-conducting metal layer in the central part is screened from discharge action by means of embedding, for example. The basic layer may be made with the working layer as the same part with different conductivity. The basic layer may be made as an inducer creating a magnet field when current passes, thus ensuring continuous movement of arc channels.EFFECT: improvement of operational reliability and service life at high values of commutated charge and current.4 cl, 6 dwg |
