Improved operating device for low-voltage air circuit breaker

The improved low-voltage air circuit breaker operation device addresses undervoltage trip coil burnout and enforces forced locking and interlocking functions, ensuring reliable operation and preventing accidental power supply and disconnection, thereby meeting regulatory and market demands.

TW202630440AActive Publication Date: 2026-07-16陈锡瑜
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Patent Information

Application Number
TW113151719
Authority / Receiving Office
TW · TW
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2026-07-16
Estimated Expiration
2044-12-30

AI Technical Summary

Technical Problem

Conventional low-voltage air circuit breakers suffer from undervoltage trip coil burnout due to continuous energization, leading to internal tripping mechanism damage and preventing forced locking, which hinders market demands for mandatory closing and long-distance interlocking functions, and lacks effective solutions for accidental energization prevention.

Method used

The improved low-voltage air circuit breaker operation device incorporates a power supply unit, electrical operation control unit, manual operation restriction unit, and external command unit, utilizing a stepper motor to replace the undervoltage trip coil, and includes mechanical linkage devices to enforce forced start/stop functions, ensuring reliable operation and preventing accidental energization.

Benefits of technology

The device enables reliable forced starting, closing, and interlocking between circuit breaker switches over unlimited distances, preventing accidental power supply and disconnection, thus enhancing the reliability and safety of power supply systems.

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Abstract

This invention pertains to an improved operating device for low-voltage air circuit breakers, designed to address the shortcomings in existing technologies. In conventional low-voltage air circuit breakers, the under-voltage trip coil, when continuously energized, can overheat and burn out, causing the internal tripping mechanism to become locked and resulting in damage. This prevents the circuit breaker from achieving forced locking functionality. If the breaker is set to trip separately, it cannot enforce forced locking, which may lead to issues such as unintentional power transmission.The improved operating device in this invention includes a power supply unit, an electrical operation control unit, a manual operation restriction unit, and an external command unit. The microprocessor in the electrical operation control unit operates according to the program settings, enabling normal opening and closing functions. The manual operation restriction unit replaces the traditional under-voltage coil to prevent long-term energization and potential burnout. Additionally, it ensures the ability to achieve forced opening and forced closing, effectively preventing accidental power transmission and unintentional power interruption.
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