An intelligent contact of an isolating switch

Abstract

The invention discloses an intelligent contact of an isolating switch, which includes a static contact assembly and a moving contact assembly that cooperate with each other; the static contact assembly includes a first conductive tube, a static contact finger, a memory alloy spring piece, and a contact finger seat ; The first conductive tube is connected to the contact finger seat; a pair of static contact fingers are installed oppositely on both sides of the contact finger seat; an arc-shaped memory alloy spring is arranged on the outer side of the pair of static contact fingers sheet; the moving contact assembly includes a second conductive tube and a moving contact body; the moving contact body is connected to the second conductive tube. The invention adopts nickel-titanium shape memory alloy to replace the existing ordinary spring steel sheet, and fundamentally solves the failure problem of the isolating switch caused by the overheating of the clamping spring, thereby greatly reducing the occurrence of heating accidents of the isolating switch and large-area power failure accidents, for The power sector saves a lot of manpower and material resources for maintenance and maintenance, and meets the urgent needs of domestic power operation enterprises.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to an isolating switch contact. Background technique [0002] At present, there are mainly two kinds of moving and static contacts of isolating switches used at home and abroad. The earlier solution is to use two or more springs to tighten the contact fingers on both sides, so that the contact fingers are in close contact with the moving contacts. A newer solution is to use arc-shaped spring sheets made of spring steel on both sides of the contact finger to compress the contact finger. After a lot of practice, it is found that these solutions have the following problems: [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 asse...

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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