Power supply lightning protection box

By designing a power surge protection box, which utilizes a telescopic metal rod and a varistor to protect the power supply, the problems of complex structure and inconvenient disassembly and assembly in existing devices are solved, enabling rapid power cut-off and improving the safety and service life of the power supply.

CN224289304UActive Publication Date: 2026-05-26YANTAI JINGYUAN MECHANICAL & ELECTRICAL EQUIPMENT CO LTD
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Patent Information

Application Number
CN202521463206.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-14
Publication Date
2026-05-26
Estimated Expiration
2035-07-14

AI Technical Summary

Technical Problem

Existing power surge protection devices have complex structures, are inconvenient to disassemble and maintain, and cannot quickly cut off the power supply during lightning strikes, leading to power supply damage.

Method used

A power surge protector box was designed, comprising a box body, cavity, terminals, varistor, electromagnet, and telescopic metal rod. The telescopic metal rod first absorbs lightning strikes, the varistor becomes a large resistor to cut off the circuit, and the electromagnet loses its magnetism to push the button to turn off the power.

Benefits of technology

With its simple structure, it protects the power supply from lightning strikes, is easy to disassemble and maintain, and can quickly cut off the power supply, thus improving its service life and safety.

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Abstract

The utility model belongs to the technical field of lightning protection, and particularly relates to a power supply lightning protection box which comprises a box body, a cavity is arranged at the top of the box body, a first binding post and a second binding post are arranged in the cavity, and the second binding post is connected with a piezoresistor through a wire. The voltage dependent resistor is respectively connected with the electromagnet and the telescopic metal rod which are arranged in the switch device, the magnetic block is fixedly connected with the long block, the spring is installed on the long block, and the electromagnet is further connected with the first binding post through a wire. Current flows through the voltage dependent resistor from the metal rod, the voltage dependent resistor generates resistance which becomes great due to the great lightning voltage, and after an electromagnet in the switching device loses the current, a spring resets to enable a long block to press a stop button, so that a power supply is turned off; the device is simple in structure and high in protectiveness, and the cavity and the tank cover are arranged, so that the device is convenient to disassemble, assemble and maintain.
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