A three-position isolating grounding switch

Abstract

The invention provides a three-station isolation earth switch. The three-station isolation earth switch comprises a switch body having moving end, wherein the moving end has an isolation closing position, an opening position and a grounding closing position. The three-station isolation earth switch also comprises a magnetic operating mechanism. The magnetic operating mechanism comprises a mechanism framework and a power output end assembled on the mechanism framework in a guide moving manner and in drive connection with the moving end. The mechanism framework is internally provided with a fixed permanent magnet for forming a magnetic field gap extending in the moving direction of the power output end. The magnetic field gap is provided with an electromagnetic coil connected with the poweroutput end and capable of reciprocating in the extending direction of the magnetic field gap. The magnetic field gap has a first limit position and a second limit position at the two ends respectivelyin the reciprocation journey, and also has a middle position arranged between the first limit position and the second limit position. The magnetic operating mechanism also comprises an elastic component for applying an acting force to the electromagnetic coil and keeping the electromagnetic coil in the middle position when compressed set length.

Description

technical field [0001] The invention relates to a three-position isolating grounding switch. Background technique [0002] The operating mechanisms used in the current three-position isolation and grounding switches are mostly traditional operating mechanisms such as electric mechanisms, electric spring mechanisms, and hydraulic mechanisms. In a specific historical period, limited by the level of technological development, the traditional operating mechanisms have its technological advancement. However, with the advancement of science and technology, the disadvantages of traditional mechanisms are gradually revealed. Traditional mechanisms have defects such as complex structures, many types of parts, difficult installation and maintenance, high operating noise, and oil leakage. The value of intelligent transformation. [0003] An invention patent application with application publication date of July 7, 2017 and application publication number CN106935438A discloses a magnet...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a three-position isolating grounding switch to solve the problem that the magnetic operating mechanism in the prior art cannot meet the three-position operation requirements

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