Novel leakage current detection breaker

Abstract

The invention relates to a novel leakage current detection breaker, comprising a shell, a fire prevention lead unit arranged in the shell, a leakage current detection unit and a tripping action mechanism, wherein, the fire prevention lead at least comprises a phase line core wire and a zero line core wire which are packed by a copper mesh shielding layer and are used for being combined with a phase line and a zero line in an electric power circuit; the leakage current detection unit is connected with the phase line core wire and the zero line core wire of the fire prevention lead unit and generates a tripping trigger signal when leakage current exists; the tripping action mechanism is used for cutting off the power supply of an electrical appliance when acquiring the tripping signal; the leakage current detection unit comprises a rectification subunit and a tripping signal generating subunit, wherein, the rectification subunit is a pair of rectification elements respectively connected with the phase line and the zero line, and the tripping signal generating subunit is connected with the rectification subunit and is used for offering the tripping trigger signal to the tripping action mechanism when the leakage current exists.

Description

Technical field [0001] The invention relates to a leakage current detection circuit breaker (LCDI), in particular to a leakage current detection circuit breaker with a simple detection structure, small volume, and low production cost. Background technique [0002] With the continuous improvement of people's safety awareness and the continuous improvement of living standards, manufacturers are urgently required to provide more and better electrical safety products. [0003] At present, there are many types of electrical safety products in the world, such as overcurrent protectors, overvoltage protectors, and leakage protectors. However, these protectors sometimes cannot provide effective protection for some special situations. For example, some wires are buried under carpets or hidden behind various furniture. Because of carelessness, these hidden wires are often crushed or caused by small animals such as mice. Bite, there is a considerable safety hazard at this time. Especially w...

AI Technical Summary

Problems solved by technology

[0006] Since the Chinese invention patent 200510132613.1 adopts the indirect tripping trigger method, the induction coil is required to detect the leakage current, and the trigger command is issued by the single-chip microcomputer, so it requires more components, so the volume is relatively large, and the production cost is relatively high. At the same time, this A method of detection through an induction coil. The magnitude of the induced current is related to the number of turns and the way the coil is wound. Therefore, the efficiency is low during the processing process, and the sensitivity is not easy to control, and malfunctions may occur.

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