HIGH-VOLTAGE DIRECT-CURRENT GROUNDING SWITCH AND STATIONARY CONTACT COMPONENT THEREOF

摘要

A high-voltage direct-current grounding switch and a stationary contact component thereof, wherein the grounding switch comprises a base (8), a movable contact (12) and a stationary contact (2), a foldable grounding knife switch (7) which is capable of swinging up and down is hinged on the base (8), and the movable contact (12) is fixedly arranged at a top end of the grounding knife switch (7), and the stationary contact (2) is located above the grounding knife switch (7) and cooperates with the movable contact (12) through insertion to switch on when an upper swing of the grounding knife switch (7) extends straight, and the grounding switch further comprises a tube bus-bar clamp (6) which is used for fixedly hanging the stationary contact (2) on a tube bus-bar (1), and a top part of the tube bus-bar clamp (6) is fixedly connected to an upper grading ring (5), and a bottom part is fixedly connected to a lower grading ring (3), and the stationary contact (2) is located on a line connecting the centres of the upper and lower grading rings (5, 3). Since the stationary contact (2) is fixedly hung on the tube bus-bar (1) directly through the tube bus-bar clamp (6), a pillar insulator for supporting the stationary contact (2) can be omitted, thereby reducing costs and avoiding an increase in the manufacturing difficulty of the insulator because of the high requirement of a direct-current system on the creepage distance of the insulator.