Contactor

Abstract

The invention discloses a contactor. The contactor comprises one or more unit phases, a mechanical transmission device and an electronic control assembly. Each unit phase comprises an independent insulated housing and a positive electrode, a static conductive rod, a negative electrode, a movable conductive rod and a reaction force elastic element which are arranged in the insulated housing separately. The mechanical transmission device comprises a center shaft which passes through the insulated housings of the one or more unit phases and used to simultaneously drive all of the movable conductive rods to make all of the movable conductive rods in electrical connection with the static conductive rods and a transmission element for controlling the rotation of the center shaft, wherein the transmission element is driven by the electronic control assembly. The movement of the transmission element is driven by the electronic control assembly, the rotation of the center shaft is driven by the transmission element, the attraction between the movable conductive rods and the static conductive rod is driven by the center shaft, and the center shaft passes through the insulated housings of the one or more unit phases and can be used to drive each unit phase, so the contactor can be formed through each absolutely independent unit phase, and an unit phase can be conveniently added on the center shaft so as to increase the rated current.

Description

technical field [0001] The invention relates to the field of switchgear, in particular to a contactor. Background technique [0002] A contactor is a breaking and closing device that can frequently close, carry and break normal current and specified overload current. It applies to electricity, distribution and consumption. In electrical engineering, because it can quickly cut off the AC and DC main circuits and the contactor can be frequently connected to a device with a large current control circuit, it is often used to control motors, and can also be used to control factory equipment, electric heaters, and working machines. For electric loads such as various electric power units, the contactor can not only connect and cut off the circuit, but also has the function of low voltage release protection. The contactor has a large control capacity and is suitable for frequent operation and long-distance control. It is one of the important components in the automatic control sys...

AI Technical Summary

Problems solved by technology

However, the insulating shell of each phase of the traditional contactor is a whole, and each phase is not absolutely independent, making it impossible to increase the rated operating current of the contactor by simply adding parallel connections

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