Strip-type tapping switch for triangular three-dimensional wound iron core transformer

Abstract

The invention discloses a strip-type tapping switch for a triangular three-dimensional wound iron core transformer, and belongs to the field of changeover switches. The strip-type tapping switch comprises a base, an adjusting mechanism and three tapping mechanisms, wherein the first tapping mechanism, the second tapping mechanism and the third tapping mechanism are respectively distributed at three corners of the same triangle; the first tapping mechanism comprises a first static contact assembly fixed on the base and a first movable contact assembly mounted on the first static contact assembly; the second tapping mechanism comprises a second static contact assembly fixed on the base and a second movable contact assembly mounted on the second static contact assembly; the third tapping mechanism comprises a third static contact assembly fixed on the base and a third movable contact assembly mounted on the third static contact assembly. The tapping switch disclosed by the invention is low in manufacturing cost, simple in lead wire structure and efficient in material saving for lead wire manufacturing; a wiring position can be close to a tapping wire of each coil of the triangular three-dimensional wound iron core transformer, and no lead wire clamps are needed on a device body.

Description

technical field [0001] The invention relates to a transformer tap changer, more specifically, to a strip tap changer for a triangular three-dimensional wound core transformer. Background technique [0002] The triangular three-dimensional wound core transformer is a distribution transformer with a new structure. It has a three-dimensional wound core. There is no air gap in the magnetic circuit and the winding is tight. The three magnetic circuits have the same length and are the shortest. The section is closer to a circle, so that the triangular three-dimensional wound core transformer has the advantages of saving materials, improving performance, reducing loss, reducing noise, three-phase balance, and reducing third harmonics. The more it is recognized by everyone, the larger its share in the bidding of the State Grid will be. [0003] With the rapid advancement of technology, the three-dimensional wound core transformer has been well developed, but the matching transforme...

AI Technical Summary

Problems solved by technology

Due to the triangular structure of the three-dimensional wound core transformer, conventional strip tap changers are difficult to use on this product, or even unusable. The reason is that there is always a certain phase in the three-dimensional wound core transformer that needs to be connected across the switch. , which will increase the volume of the charged body and increase the space occupied by the transformer

At present, the three-dimensional wound core transformers on the market all adopt disc-shaped tap changers, and the structure of disc-shaped tap-changers is relatively complicated, and the manufacturing cost is relatively high, so the price is high, and the production of lead wires is troublesome, and the production efficiency is very low.

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