Clip-on ammeter for residual current detection

By optimizing the jaw structure and magnetic core assembly design of the clamp meter, the problems of incomplete magnetic circuit and heat dissipation caused by jaw wear have been solved, resulting in higher detection accuracy and service life.

CN121995100APending Publication Date: 2026-05-08NANJING GUANGCHUANG TECH CO LTD
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Patent Information

Application Number
CN202610285344.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-10
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing clamp-on ammeters are prone to wear at the jaws during prolonged use, leading to incomplete magnetic circuits and affecting detection accuracy. Furthermore, the magnetic core assembly has difficulty dissipating heat during operation, which affects its service life.

Method used

By optimizing the jaw structure and integrating the jaw closing mechanism with the negative pressure bonding component, a tight jaw fit is ensured. The ring-shaped protective cover plate works in conjunction with the inner jaw core mechanism to achieve installation protection and auxiliary heat dissipation for the core component. At the same time, a Hall element is added to improve the detection accuracy.

Benefits of technology

It effectively avoids incomplete magnetic circuits, improves magnetic field uniformity and measurement accuracy, extends the service life of clamp-on ammeters, and enhances the accuracy and safety performance of residual current detection.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention relates to the technical field of clip-on ammeters, in particular to a clip-on ammeter for residual current detection, which comprises a residual current handheld meter body and a residual current sensor, and a connecting wire is arranged between the residual current handheld meter body and the residual current sensor. The structure of a fixed annular jaw and the structure of a movable annular jaw are optimally designed, a jaw closing mechanism is integrated at the closed position of the end of the jaw and combined with a negative pressure attaching assembly, it is ensured that the jaws are completely and tightly attached when closed, and the problems that tiny gaps exist, consequently, a magnetic circuit is incomplete, and the uniformity and measurement precision of a magnetic field are affected are solved; and the annular protective cover plate is matched with the inner side tong head magnetic core mechanism, so that gap compensation at the magnetic core mounting cavities on the inner sides of the fixed annular jaw and the movable annular jaw is met, mounting protection of the magnetic core assembly can be achieved, and auxiliary heat dissipation of the magnetic core assembly in the working state can be assisted.
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