| 摘要 |
A three-position vacuum switch for realizing external grounding of a load side by using a connected busbar overcomes the problems in the prior art that load side grounding is realized depending on the opening and closing of a vacuum arc extinguishing chamber, a misoperation easily occurs because an operator cannot see the grounding situation intuitively, and when an operating mechanism machine has a problem, it needs to have a grounding line plugged in externally, which cause inconvenient operations and huge safety risks, characterized in that a connected busbar is hinged on front and back sides of a load socket, the vacuum arc extinguishing chamber is connected to the connected busbar by using a pin, the connected busbar is electrically connected to a grounding socket to realize primary grounding, and the vacuum arc extinguishing chamber is electrically connected to the grounding socket to realize auxiliary grounding. The beneficial effects are that the primary grounding process can be intuitively seen by an operator, and the structure is simple and operations are convenient with safety and reliability, and the case where a cut-off process is undertaken only by the vacuum arc extinguishing chamber, and after the cut-off, power frequency and thunder impulse withstand voltages are undertaken by the vacuum arc extinguishing chamber and an insulation gas jointly is realized, thereby reducing the possibility that an NSDD phenomenon occurs, and improving the running safety of a switch device. |
