Trip mechanism and earth leakage protector

Abstract

A tripping mechanism, comprising a magnetic conductive frame (1) which is provided with two support legs (11, 12) and an intermediate part (13) connecting the two support legs (11, 12); a pin (2) capable of being axially and movably arranged between the two support legs (11, 12); a magnetic conductive plate (3) coupled to free ends of the two support legs (11, 12); a bias mechanism (5) for providing an acting force for the pin (2); and a coil (6) which surrounds the pin (2) and is located between the two support legs (11, 12) of the magnetic conductive frame (1). Also provided is a leakage protector. The tripping mechanism and the leakage protector have the advantages of lower manufacturing costs, more reliable quality when being manufactured in batch, smaller tripping power and easy adjustment.

Description

technical field [0001] Various embodiments of the present disclosure relate to the field of earth leakage protectors, and in particular, relate to tripping mechanisms in earth leakage protectors. Background technique [0002] The leakage protector is a safety device, which is used to disconnect the working circuit when the equipment has a leakage fault, so as to protect the equipment and personal safety. The leakage protector monitors the leakage signal. When the leakage reaches the tripping threshold. The internal tripping mechanism acts, triggering the switch mechanism to act, thereby shutting off the working current and realizing the leakage protection function. Some of the energy required for the action of the tripping mechanism comes from the main circuit, some comes from the energy stored in the capacitor in the circuit, and some directly comes from the energy of the leakage current. In the design of leakage products, under the same product performance, the smaller ...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned tripping mechanism of the prior art, due to the use of an annular permanent magnet, it is difficult to adjust the magnetic field distribution relative to the moving element, so it is necessary to design different permanent magnets and different installations for tripping mechanisms with different sensitivity requirements. structure

This reduces flexibility and increases costs in manufacturing trip mechanisms with different sensitivities

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