Neutral grounding fault creepage protecting plug

Abstract

The invention relates to a plug for a ground fault creepage protector, which consists of a housing, a circuit board control circuit arranged inside the housing, a relay control circuit mechanism arranged inside the housing. The circuit board control circuit consists of a DC power supply, an absorption retaining circuit, an instant start-up circuit, an integrated amplifying circuit, a fault current sensing circuit, a neutral false ground circuit and a release control circuit. The plug for the ground fault creepage protector overcomes the defects of the prior mechanical-type restoration structure; and the neutral failure is prevented from being out of control if the neutral line contacts falsely or the circuit is opened artificially on restoration. In addition, the invention has the advantages of high security, flexible delicate protection actions against neutral fault and creepage, as well as convenient assembly, and serves the functions of resisting shock, resisting water, resisting false restoration, resisting backward false wiring, resisting broken input phase lines / neutral lines, protecting against poor contact, and automatically disconnecting an electric power supply.

Description

technical field [0001] The invention relates to a plug, especially a plug with waterproof function, reverse wrong wiring protection function, input phase line / neutral line disconnection or poor contact will automatically cut off the power supply protection function and electronic instant start reset, Reset maintained neutral ground fault RCD plug. Background technique [0002] Protection devices, such as neutral ground fault leakage protection plug (GFCI), are widely used because they can effectively prevent personal electric shock, neutral ground fault leakage protection equipment and fire accidents. [0003] With the development of science and technology, the neutral ground fault leakage protection plug is developing in the direction of high performance, high sensitivity and multifunctional protection. In the past, the neutral ground fault leakage protection plug was generally simple in structure, low in sensitivity, poor in protection performance, and less in function. ...

AI Technical Summary

Problems solved by technology

[0004] For example: the leakage protection plug described in U.S. Patent No. 5,943,199 uses a mechanical reset actuator, and the reset pull rod (reset column) pulls the drag device through the hook on the drag device (actuator), so that Relay reset; this device uses the armature on the tripper to drive the drag device, so that the hook on the drag device is separated from the reset rod, so that the leakage protector is tripped; all leakage protectors produced with similar technology have A common disadvantage is that when the contact surface or contact force between the hook and the reset lever is too large, it will cause unfavorable tripping, and when the contact surface or contact force is reduced, the product will cause slight oscillation and trip, that is, Mis-tripping occurs, so the products produced by this technology have great hidden dangers in terms of processing and product performance.

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