A circuit breaker operating mechanism capable of quick release

Abstract

The invention discloses a circuit breaker operating mechanism which is provided with a tripping locking device capable of tripping quickly in a short circuit, wherein the circuit breaker operating mechanism is supported by a rack. The circuit breaker operating mechanism specifically comprises a tripping connecting rod device, a switch spindle, the tripping locking device and a brake separating half shaft. The tripping connecting rod device is related to a tripping hook and a brake separating spring. When the tripping hook moves from a loading position to a brake separating position, a moving contact can be driven to move from an on-position to an off-position. The switch spindle is connected with the tripping connecting rod device and is connected to all moving contacts which support a circuit breaker. The tripping locking device is matched with the tripping hook. When the tripping locking device is at a locking position, the circuit breaker operating mechanism is in a bearing state; when the tripping locking device is at an unlocking position, the circuit breaker operating mechanism is in a jumping state. The brake separating half shaft is controlled by a jumping action piece and used for relieving the locking state of the tripping locking device. When a short-circuit current exceeds a calibrated threshold value, the tripping locking device is at the unlocking position, the circuit breaker operating mechanism trips automatically, and the threshold value is defined by an elastic element. The circuit breaker operating mechanism is simple in structure and easy to realize.

Description

technical field [0001] The invention relates to an operating mechanism of a large electric power low-voltage multi-pole circuit breaker, in particular to an operating mechanism of a circuit breaker with a tripping locking device capable of quick tripping when short-circuited. Background technique [0002] The traditional operating mechanism of the circuit breaker provides a large mechanical reaction force due to the electric repulsion force, which may damage some transmission parts and shafts of the mechanism, and increase the distance between the trip hook, the trip lock device and the opening half shaft. The tripping force reduces the mechanical life. And the traditional trip lock device needs about 20ms from receiving the signal to responding, and this tripping time is too long. [0003] Some patents (referring to patent FR-A-2239755, FR-9601661) have proposed some schemes to solve and improve these problems, but all have the problems of complex structure and high cost. ...

AI Technical Summary

Problems solved by technology

[0002] The traditional operating mechanism of the circuit breaker provides a large mechanical reaction force due to the electric repulsion force, which may damage some transmission parts and shafts of the mechanism, and increase the distance between the trip hook, the trip lock device and the opening half shaft. trip force, reducing mechanical life

And the traditional trip lock device takes about 20ms from receiving the signal to responding, and this tripping time is too long

[0003] Some patents (referring to patent FR-A-2239755, FR-9601661) have proposed some schemes to solve and improve these problems, but all there is the problem of complicated structure, high cost

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