Tripping mechanism of electric leakage breaker

Abstract

The invention discloses a tripping mechanism of an electric leakage breaker. The tripping mechanism comprises a housing, an electric leakage tripping device, a resetting member and a tripping connecting rod, wherein the electric leakage tripping device, the resetting member and the tripping connecting rod are arranged in the housing. The resetting member is internally provided with a resetting spring and is snapped with the housing through the resetting spring. The electric leakage tripping device comprises a moving iron core which can attract extendably. The tripping connecting rod is hingedwith the housing. Furthermore the tripping connecting rod is in the movement track of the moving iron core and is arranged in a manner of pushing the moving iron core. One end, which is far from the moving iron core, of the tripping connecting rod is provided with a hook which is buckled with or abuts against the resetting member. The tripping connecting rod is provided with a tripping connectingrod resetting spring which always drives the hook to buckle with the resetting member. The tripping mechanism is advantageous in that the tripping connecting rod has an elastic function force for resetting; the resetting member can be better fixed; and spring of the resetting member in a normal working state is prevented.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to a tripping mechanism of an earth leakage circuit breaker. Background technique [0002] Residual current circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions, and can close, carry and break current under abnormal circuit conditions within a specified time. When there is leakage or personal electric shock in the protected circuit, as long as the leakage current reaches the operating current value selected by the design, the leakage release in the leakage circuit breaker will make the circuit breaker operate, thereby cutting off the power supply to protect against leakage and electric shock. [0003] The Chinese patent with the publication number CN204857632U discloses a tripping mechanism of an earth leakage circuit breaker, including a circuit breaker casing, a circuit breaking mechanism, a leakage current detection s...

AI Technical Summary

Problems solved by technology

However, after the electromagnetic release is used for a long time, the moving iron core will appear aging, and the length of the pop-up will decrease. At this time, the circumferential rotation of the moving iron core to push the trip link will also decrease, and the trip link will The hook on the reset part cannot be fastened with the positioning boss on the reset part, so the reset part cannot be fixed, and the reset part is always in the pop-up state, losing the trip indication function

In addition, the U-shaped opening of the trip link needs to be combined with the moving iron core before installation, which is slow in installation speed and low in efficiency

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