Intelligent circuit breaker with phase selection function

Abstract

The invention discloses an intelligent circuit breaker with the phase selection function, which comprises a shell and a phase selection device in the shell, wherein the phase selection device comprises bistable permanent magnet mechanisms and a yoke plate mechanism, the bistable permanent magnet mechanisms are three groups of electromagnetic mechanisms, and each transmission rod is simultaneouslyengaged to or disengaged from the yoke plate mechanism to realize the simultaneous advancing and retreating opening / closing or single-phase advancing and retreating opening / closing of a three-phase circuit. By adopting the novel bistable permanent magnet mechanisms and the yoke plate mechanism, the intelligent circuit breaker not only has synchronous on and off capability but also has split-phaseselection on and off capability, and can be used as a reclosing device by equipping a reclosing controller; and the intelligent circuit breaker can also be used as an opening switch by equipping an intelligent controller. Meanwhile, the mechanisms are loaded into an SF6 air tank shell to avoid pollution and rusting by the external environment; and the switch shell is subjected to frosting and solid insulation heat isolating treatment so as to increase the insulating property and reduce the size of the switch, and the internal and external connection part of the switch is subjected to double-layer sealing treatment, thus the service life of the switch can be prolonged to more than 30,000 times, and the switch is applicable to frequent operation.

Description

technical field [0001] The invention discloses an intelligent circuit breaker with a phase selection function, belongs to the field of circuit breaker manufacturing technology according to the International Patent Classification (IPC), and in particular relates to a three-phase common Box type intelligent circuit breaker. Background technique [0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Among them, high-voltage circuit breakers (or high-voltage vacuum switches); The main power control equipment in the substation line, when the power system is running normally, it can cut off and connect the no-load and load current of the line and various electrical equipment; when the system fails, it cooperates with the relay protection control circuit , can quickly cut off the short-circuit fault current to prevent the expansion of the scope of the accident, so the quality of the high-voltage ci...

AI Technical Summary

Problems solved by technology

At present, the sealing performance of the opening of the circuit breaker shell is poor, which is prone to safety hazards

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