Electronic type overload relay tripping and resetting switch device

Abstract

The invention relates to an electronic type overload relay tripping and resetting switch device comprising a moving contact support rack, four permanent magnets and a U-shaped armature on which a wire coil winding sleeves, wherein the moving contact support rack is mounted on an inner wall of a shell body of the electronic type overload relay switch device in a clamped manner, the moving contact support rack is formed by a support rod and two support arms that are fixed on a lower end of the support rod to form a structure shaped like a Chinese character tu, each of two sides of the two support arms is provided with a framework space, a permanent magnet is mounted each the framework space, magnetic conductive sheets inlaid on the support rack are respectively mounted in front and back side surfaces of the two support arms, and end parts of the U-shaped armature are plugged between left parts and right parts of an upper layer support arm and a lower layer support arm. In the electronic type overload relay tripping and resetting switch device, the four permanent magnets are supported via one support rack and are enabled to be consistent in depth of parallelism. The two magnetic conductive sheets are inlaid on the support rack, a tripping magnetic circuit and a resetting magnetic circuit respectively form closed loop magnetic circuits, and reliability of electronic type overload relay operation can be improved.

Description

Technical field [0001] The invention belongs to an electronic overload relay, in particular to a trip and reset conversion device of the electronic overload relay. Background technique [0002] In the currently known TR40 series electronic overload relay trip and reset conversion mechanism, because the bracket supporting the four permanent magnets is composed of a plastic bracket and a metal fixing base, two of the metal fixing bases are equipped with permanent magnets The frame of the plastic bracket needs to be parallel to the two frames with permanent magnets of the plastic bracket, but the frame of the metal fixing seat is processed by a bending process, so the parallelism of the frame of the metal fixing seat is inconsistent. The frame of the plastic bracket is not parallel; in addition, the trip magnetic circuit and the reset magnetic circuit are not closed loop magnetic circuits. The above two situations lead to unreliable actions of the trip and reset conversion mechanis...

AI Technical Summary

Problems solved by technology

[0002] In the currently known TR40 series electronic overload relay tripping and reset conversion mechanism, since the bracket supporting four permanent magnets is composed of a plastic bracket and a metal fixing seat, two of the metal fixing seats are equipped with permanent magnets. The frame of the plastic bracket needs to be parallel to the two frames equipped with permanent magnets of the plastic bracket, but the frame of the metal bracket is processed by bending technology, so the parallelism of the frames of the metal bracket is inconsistent, and often the frame of the metal bracket and the The frame of the plastic bracket is not parallel; in addition, neither the tripping magnetic circuit nor the reset magnetic circuit is a closed-loop magnetic circuit

The above two situations lead to unreliable action of the tripping and reset switching mechanism

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