| 摘要 |
FIELD: electricity. ^ SUBSTANCE: invention refers to switching device with vacuum arc-extinguishing chamber in which at least one movable contact element is located; two in-series connected contact devices with two opened contact planes are located inside vacuum arc-extinguishing chamber; contact element moving together with the first contact element is enveloped with bowl-shaped device which is a part of contact element or rigidly connected to it or equipped with a hole through which the contact element having active contact surfaces on both sides passes. Both contacts have the possibility of being actuated with one common actuator. ^ EFFECT: increasing switching capacity and dielectric strength. ^ 10 cl, 2 dwg |
