High-voltage sealed direct-current contactor capable of resisting short-circuit current

Abstract

The invention comprises a high-voltage sealed direct-current contactor capable of resisting short-circuit current. The high-voltage sealed direct-current contactor comprises a contactor body, wherein the contactor body comprises a contact point rod, the contact point rod is arranged above a contact bridge, a first armature is fixedly connected to a convex hull below the contact bridge, a second armature is arranged above the contact bridge, when current passes through the contact bridge, magnetic flux is generated, the magnetic flux forms a magnetic loop in the first armature and the second armature to generate electromagnetic attraction force, the second armature is located above the first armature and wider than the first armature, and due to the fact that the part, wider than the first armature, of the second armature additionally forms the magnetic loop, the middle magnetic loop can be enhanced. compared with the prior art, the high-voltage sealed direct-current contactor has the advantages that the anti-short-circuit capability is enhanced, enough contact pressure can be provided under the condition that the product cost is saved so as to resist electric repulsive force caused by short-circuit current on the contact bridge, the magnetic efficiency is high, and a magnetic circuit is not easy to saturate.

Description

technical field [0001] The invention relates to the technical field of DC contactors, in particular to a high-voltage sealed DC contactor capable of resisting short-circuit current. Background technique [0002] DC contactor refers to the contactor whose iron core is controlled by DC, and its load can be DC or AC. The iron core of the DC contactor is different from the AC contactor, it has no eddy current, so it is generally made of mild steel or industrial pure iron. Since the attracting coil of the DC contactor is supplied with DC, there is no impact starting current, and there will be no violent impact of the iron core, so it has a long service life and is suitable for frequent start-stop occasions. The selection of AC and DC contactors can be checked in the electrical product catalog according to the working voltage and current of the line. [0003] There are some disadvantages in the prior art: [0004] The connection mode of the armature under the contact bridge of ...

AI Technical Summary

Problems solved by technology

[0004] The connection mode of the armature under the contact bridge in the prior art is that two pieces respectively surround the half of the contact bridge. Although a magnetic circuit is enhanced compared with the traditional first armature integrally surrounding the contact bridge, the added piece of armature will increase the cost of the product

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