High-voltage sealed direct-current contactor with auxiliary contact

Abstract

The invention relates to a high-voltage sealed direct-current contactor with an auxiliary contact. The contactor comprises a ceramic seat, an auxiliary point rod and a contact point rod are fixedly connected onto the ceramic seat, the ceramic seat is of a convex three-dimensional structure, and a groove structure is arranged on the outer surface of the ceramic seat. Arc extinguishing magnetic steel is arranged in the groove structure, the ceramic seat is sleeved with a magnetic conductive support, the auxiliary point rod and the contact point rod are fixedly installed on the two sides of the ceramic seat, the contact point rod part and the auxiliary point rod part are directly separated through the shape of the ceramic seat, the contact point rod and the auxiliary point rod do not need to be separated through dispensing in order to meet the voltage resistance requirement externally, the occupied space is small, the arc extinguishing magnetic steel area is not affected, and the arc extinguishing capability of the product is effectively improved.

Description

technical field [0001] The invention relates to the technical field of DC contactors, in particular to a high-voltage sealed DC contactor with auxiliary contacts. Background technique [0002] DC contactor refers to a 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. Because the attracting coil of the DC contactor is connected with DC, there is no impact starting current, and there will be no violent impact of the iron core. Therefore, it has a long 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] At present, due to the problem of sealing and design, the sealed DC contactors on ...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a high-voltage sealed DC contactor with auxiliary contacts, which can solve the problem that the micro switch in the device is arranged on the side of the main contact, and occupies a relatively large space. It is necessary to reduce the space of the arc-extinguishing magnetic steel, which is not conducive to The arc extinguishing of the main contact causes unstable breaking performance of the product, cumbersome manufacturing process, large contact resistance and high cost

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