Phase-change switch

Abstract

The invention discloses a phase-change switch which comprises three permanent magnetic contact mechanisms, three clamp plates, a clamp plate hand lock mechanism and a clamp plate mutual exclusion mechanism. A user-side single-phase live wire connector and uplink-side three-phase live wire connectors are connected with three groups of static contact pairs, and three groups of static contact pairs respectively correspond to the three permanent magnetic contact mechanisms. The permanent magnetic contact mechanisms comprise permanent magnetic mechanisms, movable contacts and guide columns. The movable contacts are mounted at the bottoms of the guide columns. The tops of the guide columns are connected with magnetic cores of the permanent magnetic mechanisms. The movable contacts can be driven to move upwardly when the permanent magnetic mechanisms upwardly suck the movable contacts, so that two ends of each movable contact can be connected with the corresponding static contact pairs. The roots of the three clamp plates are respectively mounted on clamp plate shafts, and the tail ends of the three clamp plates are respectively movably connected with the guide columns of the three permanent magnetic contact mechanisms. When one of the clamp plates upwardly swings, the other two clamp plates can be clamped by the clamp plate mutual exclusion mechanism and cannot upwardly swing. Operators can forcibly separate the three movable contacts from three static contacts via the clamp plates by the aid of the clamp plate hand lock mechanism.

Description

technical field [0001] The present invention relates to commutation switches. Background technique [0002] The commutation switch is a necessary device to deal with the three-phase unbalance problem on the current grid. When the current of the live wire of a certain phase is too large, the live wire connected to the user side can be switched through the phase change switch, so that the live wire connected to the user side can be switched from the current phase live wire to another phase live wire to reduce the load of the phase live wire. By balancing the current of each phase Improve the utilization and availability of grid power. Most commutation switches in use today are dial-based. The moving contact is set to rotate on the turntable. As the moving contact rotates around the center of the turntable, the connection is changed to achieve phase change. The biggest advantage of this kind of reversing switch is that it is naturally mutually exclusive, that is, the fire w...

AI Technical Summary

Problems solved by technology

But the biggest problem with this kind of commutation switch is that the electrification control is cumbersome, and usually requires a motor to realize the rotation of the turntable

However, the motor is usually not reliable, and the angle of rotation is difficult to control

In addition, the switching time of this kind of commutation switch is relatively long when commutating

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