High-voltage isolating switch, its fracture assembly, and method for manufacturing female contacts

Abstract

The invention discloses a high-voltage isolating switch, which comprises a fracture assembly formed by a male contact (11) and a female contact (12) in a matching manner, and a conductive arm fixedlyconnected with the male contact and the female contact separately, wherein the male contact is provided with an annular flange (112) and a body part (110); the annular flange (112) extends outwards from the end part or the vicinity of the body part (110) along the radial direction; the female contact is provided with a plurality of contact fingers (124) which are around the central axis in a cylindrical arrangement manner, the radius of an incircle of an enclosed cylindrical space is smaller than that of the annular flange of the male contact; each of the plurality of contact fingers (124) comprises a joint part (1242) jointed with the annular flange (112) of the male contact (11) when the isolating switch is closed, and each joint part is formed into an arc shape matched with the periphery of the annular flange of the male contact on the section vertical to the central axis; and the plurality of contact fingers (124) are electrically connected with the male contact through the joint parts by virtue of elasticity, wherein the female contact also comprises a fixing part (120) for fixedly and electrically connecting the contact fingers (124) to the first conductive arm (13) in an arcsurface contact manner.

Description

technical field [0001] The invention relates to a high-voltage isolating switch and a fracture assembly thereof, and also relates to a method for manufacturing a female contact of the high-voltage isolating switch. Background technique [0002] The high-voltage isolating switch is a switchgear used in high-voltage power systems to separate and close circuits with voltage and no load. At the disconnection point, the high-voltage isolating switch can reliably pass the normal working current and withstand the short-circuit fault current in the closed state. In addition, the cooperation of the high-voltage isolating switch and the high-voltage switch can also change the load operation mode of the power grid. High-voltage isolating switches are the most used power equipment in the power system, and most of them are used outdoors. [0003] The high-voltage isolation switch carries current through the electrical part supported on the post insulator. The electrical part includes a ...

AI Technical Summary

Problems solved by technology

[0004] In addition, high-voltage isolating switch fracture finger contacts can be divided into three types according to the shape of the contact point: point contact type, line contact type and surface contact type. Since the surface contact type is not suitable for outdoor isolating switch contacts, it is generally not used.

[0005] In the existing high-voltage isolating switch, since there are two front and rear contacts on the contact, these two contacts form a series connection, which will cause the spring to shunt and generate heat, so that the spring anneals

On the other hand, because the contacts of the high-voltage isolation switch are generally exposed outdoors and are greatly affected by the environment, the connection of the front and rear contacts in series can easily cause heat in the circuit

[0006] In addition, in the existing high-voltage isolating switch, when the male contact and the female contact are in contact, due to the poor torsion of the contact fingers and insufficient self-adjustment, the pressure of the contact points on both sides of the contact fingers cannot be balanced, and the conductive effect is poor.

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