Circuit emergency protection device of high voltage switch cabinet

By introducing a combination of leakage current protection and temperature sensors into the high-voltage switchgear, the power outage is triggered by changes in the current sensed by the magnetic ring, and combined with cooling and ventilation mechanisms, the problem of existing devices being unable to quickly cut off power and prevent fires is solved, thus improving safety and sensitivity.

CN122136764APending Publication Date: 2026-06-02SHAANXI BAOGUANG SHANHE ELECTRIC DEVICE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI BAOGUANG SHANHE ELECTRIC DEVICE CO LTD
Filing Date
2026-03-24
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing high-voltage switchgear circuit emergency protection devices cannot quickly detect abnormal currents and cut off power, thus failing to effectively prevent electric shock injuries and fire hazards. They also have low sensitivity and are unable to detect minute insulation defects.

Method used

The system combines a leakage current protection mechanism and a temperature sensor with a cooling mechanism and a ventilation mechanism. It triggers the conduction of a thyristor by sensing the change in current through a magnetic ring, instantly cutting off the power. It also uses a servo motor and a blower fan for rapid cooling and ventilation, thus achieving emergency circuit protection for the high-voltage switchgear.

Benefits of technology

It enables rapid power outage, prevents electric shock and fire, improves the ability to detect minute insulation defects, and enhances the sensitivity and safety of circuit emergency protection.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a circuit emergency protection device for high-voltage switchgear, belonging to the technical field of circuit emergency protection equipment. The device includes a switchgear body, an internal mounting frame, a leakage current protection mechanism mounted on the top of the mounting frame, an inspection light mounted on the top of the switchgear body, a temperature sensor mounted inside the switchgear body, a cooling mechanism mounted at the bottom of the switchgear body, a ventilation mechanism mounted on the top of the switchgear body, and a leakage current protector mounted on the top of the mounting frame. The leakage current protector contains a magnetic ring, with a copper wire sleeved on its outer wall. A connecting wire is attached to the top of the copper wire, and the top of the connecting wire is connected to a circuit board. This invention can quickly detect abnormal current and cut off the power supply, providing more direct protection for operators. By monitoring leakage current, it can cut off the power supply before a fire hazard occurs, significantly reducing the risk.
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