Magnetic flux tripping device, disconnector and power supply system

By setting multiple moving iron cores in the flux trip unit, the fault type can be distinguished according to the electrical signal strength, achieving accurate response. This solves the problem that a single moving iron core cannot distinguish faults in the existing technology, and improves the stability and safety of the system.

CN224366750UActive Publication Date: 2026-06-16SHANGHAI LIANGXIN ELECTRICAL CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI LIANGXIN ELECTRICAL CO LTD
Filing Date
2025-04-25
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing flux trip devices only have one moving iron core, which cannot distinguish between different fault types, leading to unnecessary power outages or delayed power outages, affecting system stability and reliability, increasing maintenance frequency and the risk of equipment damage.

⚗Method used

At least two moving iron cores are arranged axially spaced within the flux trip unit. Different moving iron cores are activated by different electrical signal strengths, thereby achieving accurate identification and response to different fault types.

🎯Benefits of technology

This improves the reliability and stability of the system, reduces false triggering and maintenance frequency, and ensures equipment safety and stable operation of the power system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of low-voltage electrical apparatus, in particular to a magnetic flux tripping device, a disconnecting switch and a power supply system, which comprise a support, an electromagnetic coil and a top rod; the electromagnetic coil is installed on the support, and the top rod is slidably arranged in the electromagnetic coil; at least two moving iron cores are arranged on the top rod in the electromagnetic coil and are axially spaced; when the electromagnetic coil is electrified, at least one moving iron core moves along the top rod in the axial direction and drives the top rod to move. According to the embodiment of the application, at least two moving iron cores are arranged in the magnetic flux tripping device, which is beneficial to realizing differentiated responses for different faults.
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