Three-station isolating switch and working method thereof

Abstract

The invention relates to a three-station isolating switch and a working method. The three-station isolating switch comprises a solid-sealed polar pole. An input bus, a first output bus, a second output bus and a vacuum arc-extinguishing chamber are integrally poured in the solid-sealed polar pole; an isolation grounding switch mounting cavity is formed in the solid-sealed polar pole; the isolatingmovable contact seat moves to the output end of the conducting input bus and the input end of the first output bus, so that the isolating switch enters a switching-on position; the isolation moving contact seat is moved away, so that the isolation switch enters an opening position; and the grounding rod is movably arranged in the isolation grounding switch mounting cavity, the rear end of the grounding rod is in conduction connection with a grounding wire, and the front end of the grounding rod moves to the input end in conduction connection with the first output bus, so that the isolation switch is switched from the opening position to the grounding position. According to the solid-sealed polar pole, the isolating switch is optimized and designed again, so that the partial discharge value of the solid-sealed polar pole is smaller, the power frequency withstand voltage value of the solid-sealed polar pole is higher, the size of the solid-sealed polar pole is reduced, and the problemsof large partial discharge value and low power frequency withstand voltage value are solved.

Description

technical field [0001] The invention relates to the field of ring network switch cabinets, in particular to a three-position isolating switch and a working method thereof. Background technique [0002] The current solid-sealed pole, such as the authorized announcement number CN104201041B published in the Chinese patent literature, the authorized announcement date is 2015.10.21, and the patent name is "combined solid-sealed pole and its working principle", which includes The three-position isolating grounding switch and vacuum interrupter assembly in the pole-sealing column drive a moving contact sleeve to reciprocate between the outlet seat, the left and right static conductive seats, and the grounding seat through a screw rod to realize circuit breaker Three-position operation; in this kind of solid-sealed pole, since the moving contact sleeve is driven by the screw to move, the solid-sealed pole manufactured will be relatively long (because it needs to accommodate the scre...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a three-position isolating switch and its working method, to solve the unreasonable structure design, unreliable conductive contact and large partial discharge value of the previous three-position isolating switch , The problem of low power frequency withstand voltage value

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