A cable sheath protector with a state monitoring function

By connecting a resonant overvoltage monitoring circuit in series at the grounding terminal of the cable sheath protector, high-frequency oscillation overvoltage is monitored and alarmed in real time, solving the problem of protection function failure caused by resonance of the cable sheath protector and ensuring the safe and stable operation of the cable system.

CN224385053UActive Publication Date: 2026-06-19WENZHOU YIXING ELECTRONIC TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WENZHOU YIXING ELECTRONIC TECH CO LTD
Filing Date
2025-07-29
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Existing cable sheath protectors frequently experience high-frequency oscillation overvoltages during operation due to the resonance between the protector's parasitic capacitance and the cable's inductance, which may cause the protector to lose its protective function. Current technology lacks effective means of condition monitoring.

⚗Method used

Design a cable sheath protector with condition monitoring function. By connecting a resonant overvoltage monitoring circuit in series at the grounding terminal of the protector body, and using a high-frequency signal acquisition unit, signal conditioning unit, threshold comparison unit and drive execution unit, the resonant current signal in the grounding wire is monitored in real time, and the alarm is triggered when the threshold is exceeded.

🎯Benefits of technology

It enables real-time status monitoring of cable sheath protectors, timely detection and alarm of high-frequency oscillation overvoltage, ensuring the safe operation of the cable system and the protection function of the protectors.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a cable sheath protector with condition monitoring function, belonging to the technical field of cable sheath protectors. It solves the problem that the parasitic capacitance of the protector resonates with the inductance of the cable, causing operational overvoltage to trigger resonance and generating high-frequency oscillating overvoltages on the sheath, exceeding the protector's design protection level. It includes a protector body and a resonant overvoltage monitoring circuit. The resonant overvoltage monitoring circuit is connected in series to the grounding terminal of the protector body. The resonant overvoltage monitoring circuit collects the resonant current signal in the grounding wire of the protector body, performs a threshold comparison, and triggers an audible and visual alarm when the signal exceeds the threshold value. During operation, the resonant overvoltage monitoring circuit collects the resonant current signal from the grounding wire. After processing, if the signal exceeds a set value, it drives an element to close the normally open contact of a relay, activating the alarm.
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