Direct-acting three-station isolation switch device

Abstract

The invention provides a direct-acting three-station isolation switch device, which comprises a solid-sealed polar pole. The solid-sealed polar pole is internally provided with isolated static contacts, grounding static contacts and a drive screw rod in the linear direction. The isolated static contacts and the grounding static contacts are arranged at a certain interval, and are arranged in pairs up and down respectively; the drive screw rod is arranged between the two isolated static contacts; the drive screw rod is provided with a sliding contact; the sliding contact can reciprocate between the isolated static contacts and the grounding static contacts with rotation of the drive screw rod and are in intermittent connection with the isolated static contacts and the grounding static contacts; and the two ends of the drive screw rod are in rotation connection with the solid-sealed polar pole, and one end thereof extends out of the solid-sealed polar pole. The direct-acting three-station isolation switch device is simple and compact in structure, can meet requirement for equipment miniaturization, realizes modular assembly and facilitates seal of the solid-sealed polar pole.

Description

technical field [0001] The invention belongs to the field of switchgear, in particular to a direct-acting three-position isolating switchgear. Background technique [0002] In the switchgear, the three-position isolating switchgear is widely used because it has the three-position functions of closing, isolating, and grounding, which can not only ensure the safe operation of the switch, but also ensure the safety of the operator. [0003] At present, the common three-position isolating switch equipment is mainly a rotary knife switch structure, such as ABB's SafeRing type and Areva's FBX type ring main unit. [0004] Although rotary three-position isolating switchgear is widely used, there are common problems. First, it requires a large space and is difficult to use in a relatively narrow space, which is not conducive to the miniaturization of switchgear. The second is that most rotary three-position isolating switchgear cannot realize modular design in structure, and the el...

AI Technical Summary

Problems solved by technology

[0004] Although rotary three-position isolating switchgear is widely used, there are also common problems. First, it requires a large space and is difficult to use in a relatively narrow space, which is not conducive to the miniaturization of switchgear.

Second, most rotary three-position isolating switchgear cannot realize modular design in structure, and the electric field distribution is not uniform

Third, when the rotary three-position isolating switch equipment is directly applied to the solid-sealed pole, it is difficult to achieve the sealing of the solid-sealed pole

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