Over-voltage and under-voltage protection circuit and over-voltage and under-voltage protector

By introducing a main processing module and a digital tube module into the over/under voltage protection circuit, users can adjust preset values, which solves the problem of insufficient flexibility of existing over/under voltage protectors in unstable power grid areas and achieves higher applicability and user interactivity.

CN223553034UActive Publication Date: 2025-11-14DELIXI ELECTRIC
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Patent Information

Application Number
CN202422835761.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-20
Publication Date
2025-11-14
Estimated Expiration
2034-11-20

AI Technical Summary

Technical Problem

Existing overvoltage and undervoltage protectors lack flexibility in areas with unstable power grid conditions, which may cause the contactor to trip repeatedly near the critical value, affecting user operation.

Method used

An over/under voltage protection circuit is provided, including a main processing module, a key detection module, and a digital tube module, which allows users to adjust preset overvoltage and undervoltage values ​​by pressing keys and display the adjustment results through the digital tube, thereby enhancing user interactivity and flexibility.

Benefits of technology

It improves the flexibility of overvoltage and undervoltage protection devices, expands their application scope, reduces repeated tripping of contactors in areas with unstable grid voltage, and enhances users' ability to monitor grid status and set parameters.

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Abstract

The utility model provides an overvoltage and undervoltage protection circuit and an overvoltage and undervoltage protector, and relates to the technical field of circuit protection. The overvoltage and undervoltage protection circuit provided by the utility model comprises a main processing module, a key detection module and a nixie tube module, the main processing module is used for acquiring an input voltage signal, a preset overvoltage value and a preset undervoltage value; the key detection module is connected with the main processing module and is used for generating a key signal in response to the switch-on condition of a circuit corresponding to a key on the overvoltage and undervoltage protector and transmitting the key signal to the main processing module, and the main processing module is also used for executing a response action according to the key signal and generating a response action signal; and the main processing module is connected with the nixie tube module and is used for transmitting the response action signal to the nixie tube module, so that the nixie tube module displays the response action signal. The overvoltage and undervoltage protector can solve the problem that an existing overvoltage and undervoltage protector can only carry out overvoltage and undervoltage protection on a circuit in a fixed voltage interval and lacks flexibility.
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