A double-break point movable contact structure of a dual-power automatic transfer switch

Abstract

The invention relates to a dual break point moving contact structure for a dual power source automatic transfer switch. The moving contact structure comprises a first moving contact, a first load static contact, a load static contactor, a second load static contact, an insulation seat, a second moving contact, a first moving contactor, a first pin, an A power source static contact, an A power source static contactor, a third moving contact, a moving contactor spring, a fourth moving contact, a B power static contactor, a B power source static contact, a second pin, a second moving contactor and a rotating shaft; when the rotating shaft does not rotate and is at the zero position, A and B power sources are both disconnected; when the rotating shaft rotates in a clockwise or anticlockwise direction, the whole moving contactor assembly is driven to rotate in the clockwise or anticlockwise direction; after rotation to a certain angle, connection of the B power source and disconnection of the A power source or connection of the A power source and disconnection of the B power source can be realized. The moving contact structure has properties of strong connection / disconnection capability, excellent mechanical electrical performance, simple structure, low manufacturing cost, long service life, stable and reliable operation and small volume and saves space.

Description

technical field [0001] The invention belongs to the field of electromechanical manufacturing, in particular to a double-break point moving contact structure of a double-power automatic transfer switch. This structure is mainly used for PC-level automatic power transfer switching appliances. This type of product has high reliable mechanical and electrical performance, fast switching speed, and strong breaking capacity. Background technique [0002] The existing automatic power transfer switch usually adopts a single-contact movable contact structure, that is, the movable contact is welded to one end of the conductor, and the other end is made into an arc shape. The shaft is hinged and can rotate around a fixed shaft. In order to increase the carrying capacity, a flexible wire connection is added to the arc end. [0003] Disadvantages of this structure: single-contact snap-on contact, large current at the moment of closing and opening, long arcing time, and easy burning of th...

AI Technical Summary

Problems solved by technology

[0003] Disadvantages of this structure: single-contact snap-on contact, large instantaneous current when closing and opening, long arcing time, easy to burn out contacts, and affect service life

Two sets of moving contacts are used, and two sets of transmission mechanisms are used to drive separately. The structure is relatively complex, the volume is large, the production cost is high, processing and assembly are difficult, and debugging and maintenance are often inconvenient.

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