Isolation switch, power conversion device and power supply system

By designing an isolating switch including a handle assembly, an action mechanism, a first drive device and a second drive device, the problem of operator misoperation of the shutdown after a fault trip is solved, the reliability and stability of the isolating switch are improved, and the safe operation of the power system is ensured.

CN120199635APending Publication Date: 2025-06-24SHANGHAI LIANGXIN ELECTRICAL CO LTD +1
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Patent Information

Application Number
CN202510540083.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-25
Publication Date
2025-06-24

AI Technical Summary

Technical Problem

In the prior art, the operator is prone to misoperation after a fault trip, causing the isolating switch to close, which poses a safety hazard.

Method used

An isolating switch is designed, including an operating unit and a contact unit, which consists of a handle assembly, an action mechanism, a first drive device and a second drive device. After the first drive device is operated, the handle assembly cannot be reset through the handle assembly, and after the second drive device is operated, the handle assembly can be reset through the handle assembly. During the unlocking of the first drive device driving action mechanism, the handle assembly can be locked or released from its linkage with the second drive device to prevent misoperation and closing.

Benefits of technology

It effectively prevents the closing of the isolating switch caused by misoperation, improves the reliability and stability of the isolating switch operation, reduces the probability of equipment damage and power outages caused by misoperation, and ensures the safe operation of the power system.

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Abstract

The invention discloses an isolating switch, a power conversion device and a power supply system, and relates to the technical field of low-voltage electric appliances. The disconnecting switch comprises an operation unit and a contact unit, the operation unit comprises a handle assembly, an action mechanism, a first driving device and a second driving device, and the first driving device and the second driving device can drive the action mechanism to unlock so as to enable the contact unit to be switched off; the first driving device cannot be reset through the handle assembly after acting, and the second driving device can be reset through the handle assembly after acting; in the process that the first driving device drives the action mechanism to unlock, the first driving device can lock the handle assembly, or the first driving device can release linkage between the handle assembly and the second driving device, so that the handle assembly cannot drive the second driving device to reset. The isolating switch, the power conversion device and the power supply system can solve the problem that an operator is easy to operate by mistake to switch on the isolating switch after a fault is released in the prior art.
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