Temperature measurement plug of ring main unit

By introducing an electromagnetic induction component and an overheat protection mechanism into the temperature sensing plug, and utilizing the alternating electric field of the cable connector for power supply and blocking heat conduction at high temperatures, the problem of easy failure of the temperature sensing plug is solved, and the long life and reliability of the equipment are achieved.

CN224218097UActive Publication Date: 2026-05-08NANJING YADIAN POWER AUTOMATION CO LTD
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Patent Information

Application Number
CN202520688531.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-14
Publication Date
2026-05-08
Estimated Expiration
2035-04-14

AI Technical Summary

Technical Problem

Existing temperature sensing plugs are prone to failure after prolonged use, leading to integrated circuit failure and lead solder joint breakage, requiring frequent replacement.

Method used

It employs electromagnetic induction components and overheat protection components, using the alternating electric field of the cable connector to generate induced current for power supply, and using an electromagnet to attract the circuit board away from the heat conduction path to block heat conduction, combined with a floating capacitor to alleviate stress concentration.

Benefits of technology

This extends the service life of the temperature sensor plug, avoids malfunctions caused by prolonged high temperatures on the circuit board, and improves the reliability and durability of the equipment.

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Abstract

The utility model discloses a ring main unit temperature measurement plug, which belongs to the technical field of temperature measurement plugs, and comprises a base and a circuit board, the outer side wall of the base is provided with a shell, one side of the base is provided with a rectangular groove, the other side of the base is provided with an overheat protection assembly, and one end of the shell far away from the base is provided with a metal connecting piece. An electromagnetic induction assembly is arranged at the end, located in the shell, of the metal connecting piece, and the circuit board is arranged in the overheating protection assembly. According to the utility model, the electromagnetic induction assembly is arranged, the cylindrical electrode plate, the metal connecting piece and the epoxy resin form a suspension capacitor, an alternating electric field is utilized to supply power to the circuit board and the energy storage capacitor bank, passive work is realized, stress concentration of the cylindrical electrode plate is reduced through the round hole, and the overheating protection assembly is arranged to protect the electromagnetic induction assembly. When the detected temperature is greater than or equal to 80 DEG C, the circuit board electrifies the miniature electromagnet, the mounting ring is attracted to compress the reset spring, the circuit board is driven to be separated from the heat conduction copper sheet, and a heat conduction path is blocked.
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