Dry transformer

Abstract

The invention discloses a dry transformer which comprises an upper clamping plate, a lower clamping plate and a transformer body mounted between the upper clamping plate and the lower clamping plate.The transformer body comprises an iron core, an upper low-voltage coil, an upper high-voltage coil, a lower low-voltage coil and a lower high-voltage coil, the upper low-voltage coil and the upper high-voltage coil sequentially sleeve the upper end of the iron core, the lower low-voltage coil and the lower high-voltage coil sequentially sleeve the lower end of the iron core, an inner gasket is arranged between the upper low-voltage coil and the lower low-voltage coil, an outer gasket is arranged between the upper high-voltage coil and the upper high-voltage coil, an upper folding screen is arranged between the upper low-voltage coil and the upper high-voltage coil, a lower folding screen is arranged between the lower low-voltage coil and the lower high-voltage coil, and a gap is reserved between the upper folding screen and the lower folding screen. By arranging the upper folding screen and the lower folding screen and reserving the gap therebetween, insulativity can be improved, and discharging effect among high-and-low-voltage coils is prevented effectively; axial interval is reduced, so that length of the iron core is reduced, size of the transformer is reduced, and making costcan be saved.

Description

technical field [0001] The invention relates to the technical field of power transformers, in particular to a dry-type transformer. Background technique [0002] Transformer is one of the important equipment in the power supply and distribution system of industrial and mining enterprises and civil buildings. Dry-type transformer is a kind of transformer, and its iron core and winding are not immersed in insulating oil. [0003] Most of the existing dry-type transformers are casting type, that is, the wound coils are casted with resin, because epoxy resin has better insulation strength than air and transformer oil, and it also has higher mechanical strength and Moisture-proof and dust-proof performance, so dry-type transformers have the advantages of energy saving and convenient maintenance compared with oil-immersed transformers, and dry-type transformers are more and more popular among users. The dry-type transformer has an insulating layer between the high-voltage coil an...

AI Technical Summary

Problems solved by technology

The dry-type transformer has an insulating layer between the high-voltage coil and the low-voltage coil. The insulating layer is mainly used to prevent discharge between the high-voltage and low-voltage coils. Due to the large protrusion of the insulating layer, the length of the iron core increases and the volume of the transformer increases. increase design cost

[0004] Therefore, how to solve the problems of large volume and high cost of dry-type transformers is a technical problem that those skilled in the art need to solve at present.

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