A fast-breaking circuit breaker

By using a combination of spring actuation mechanism and permanent magnet actuation mechanism in the circuit breaker of high-voltage switching equipment, a rapid opening and closing operation is achieved, solving the problem of excessively long opening and closing operation time of circuit breaker in the prior art, and improving the fault handling efficiency of the power grid.

CN117766350BActive Publication Date: 2025-06-10CHANGZHOU BORI ELECTRIC POWER AUTOMATION EQUIP +2
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Patent Information

Application Number
CN202310384714.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-12
Publication Date
2025-06-10
Estimated Expiration
2043-04-12

AI Technical Summary

Technical Problem

The circuit breakers of existing high-voltage switching equipment cannot be completed quickly during the opening and closing operation, which affects the multi-pole difference protection and fault handling efficiency of the power grid.

Method used

A fast circuit breaker is designed, using a spring operating mechanism to achieve closing operation, and a permanent magnet operating mechanism to achieve opening operation, and the closing or opening state is maintained through the opening and closing holding mechanism.

Benefits of technology

The rapid opening and closing operation of the circuit breaker is realized, which reduces the possibility of empty operation, improves the stability, reliability and speed of operations, and meets the rapid demand for short-circuit fault judgment and resolution of power grids.

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Abstract

The present invention relates to a quick-break circuit breaker, which includes a main shaft, a spring operating mechanism, a permanent magnet operating mechanism and a closing and opening holding mechanism. The main shaft is respectively connected to three insulating tie rods of the circuit breaker through three sets of triangular link plates arranged in the same direction; the spring operating mechanism includes a closing assembly connected to the main shaft, and a closing spring arranged on one side of the closing assembly. The closing assembly can store energy in the closing spring to drive the circuit breaker to close; the action rod of the permanent magnet operating mechanism is connected to the main shaft through a connecting plate to drive the circuit breaker to open; the closing and opening holding mechanism includes a holding spring, and the torque of the holding spring is balanced with the torque generated by the main shaft to maintain the closing or opening state of the circuit breaker. In the present invention, the spring operating mechanism and the permanent magnet operating mechanism are independent of each other, not restricted by time and position, reducing the possibility of the circuit breaker's no-load operation and improving the stability, reliability and rapidity of the action.
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