Intelligent contact of isolation switch

Abstract

The invention discloses an intelligent contact of an isolation switch. The intelligent contact comprises a static contact assembly and a moving contact assembly which are matched with each other, and is characterized in that the static contact assembly comprises a first conductive tube, static contact fingers, memory alloy spring pieces and a finger base; the first conductive tube is connected with the finger base; the paired static contact fingers are installed at two sides of the finger base oppositely; the arc-shaped memory alloy spring pieces are arranged at the outer sides of the static contact fingers which are arranged in the paired mode; the moving contact assembly comprises a second conductive tube and a moving contact body; and the moving contact body is connected with the second conductive tube. According to the invention, nickel-titanium shape memory alloy is adopted to replace existing common spring steel pieces, so that a problem that the isolation switch loses efficacy due to overheating of clamping springs is solved fundamentally, thus occurrence of isolation switch heating accidents and large-area power outage accidents is greatly reduced, a large number of manpower and material resources for overhauling and maintaining are saved for the electric power department, and urgent needs of domestic power operation enterprises are met.

Description

Technical field [0001] The invention relates to the field of power equipment, in particular to an isolating switch contact. Background technique [0002] At present, there are mainly two types of static and dynamic contacts of isolating switches used at home and abroad. The earlier solution adopted is to use two or more springs to tighten the contact fingers on both sides so that the contact fingers and the moving contacts are in close contact. A newer solution is to use curved spring sheets made of spring steel on both sides of the contact fingers to compress the contact fingers. After a lot of practical use, these solutions have the following problems: [0003] (1) If insulation measures are not taken between the spring and the static contact assembly, or measures are taken but damaged, it will cause current to flow through the spring and the spring will lose its elasticity during annealing, resulting in poor contact between the static contact assembly and the moving contact ass...

AI Technical Summary

Problems solved by technology

[0003] (1) No insulation measures have been taken between the spring and the static contact assembly or measures have been taken but it has been damaged, which will cause the current to flow through the spring and anneal the spring to lose its elasticity, resulting in poor contact between the static contact assembly and the moving contact assembly and heating; The spring will be fatigued when it is in the working state of being pressed or connected for a long time, and it will gradually lose its elasticity as the running time increases, and even cause permanent deformation, resulting in poor contact of the contacts

[0004] (2) Due to the long-term use of the bolts of the static contact assembly and the moving contact assembly, it is easy to loosen, resulting in poor contact between the contact finger and the moving contact, resulting in poor contact of the contact surface and overheating

[0005] (3) As the number of operations increases or the thickness of the coating is uneven, the coating of the fingers will peel off and copper will be exposed, resulting in overheating of the contacts

[0006] Due to the heating of the contacts, the isolation switch will fail, which will cause large-scale power outages, and the power failure of the transmission line will cause major economic losses and adverse social impacts.

In order to avoid this phenomenon, the power sector needs to increase inspection efforts, and a large number of frequent inspections will also consume a lot of manpower and material resources

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