Epoxy cast dry transformer

Abstract

Disclosed is an epoxy resin cast dry-type transformer, which comprises a low-voltage winding, two high-voltage windings, an iron core, an upper heel piece, a lower heel piece, an upper clamp and a lower clamp. The low-voltage winding is arranged at the inner layer of the loop and the high-voltage windings are arranged at the outer layer of the loop. The low-voltage winding is made of clutch gold and is provided with an insulating interlayer which is presoaked with DMD resin. The initial loops of the high-voltage windings are located at one end of the whole loop, and the starting end of the first coil of each layer of the high-voltage windings is connected with the finishing end of the last coil of the next layer. The number of the coils of the windings descends from the inner layer to theouter layer, making the windings developing into antiparallelogram structures; a soft gridding cloth layer is arranged between each two adjacent layers; the whole medium is epoxy resin and solvent-free gridding material is arranged between the outer layers of the windings at both ends of the whole loop. The epoxy resin cast dry type transformer is reasonable in design, novel in design, large in power, and small in size, and is convenient to install and easy to maintain. The epoxy resin cast dry type transformer is safe, stable and reliable and is long in service life and low in using cost andrequires no daily maintenance. The epoxy resin cast dry-type transformer has strong practicability and is applicable in power supplying departments and power consuming departments.

Description

technical field [0001] The invention relates to a transformer, in particular to an epoxy casting dry-type transformer. Background technique [0002] Transformer is an important equipment in power generation, power supply and power consumption enterprises. It is also in a very critical position in the power grid. The structure and materials directly affect the quality and safety of power supply. Although the production of transformers is a specialized and relatively mature technology, in order to improve the quality and safety of power supply and consumption, according to the specific use environment and demand conditions of each department, it is necessary to analyze the shortcomings and problems of the transformers in use. Insufficient effective transformation. [0003] The ordinary epoxy cast dry-type transformers currently used have specific shortcomings and deficiencies in actual operation: First, the high-voltage winding of this transformer is composed of two consecut...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the commonly used epoxy cast dry-type transformers have small longitudinal capacitance value, poor anti-interference performance of longitudinal impact, easy to produce partial discharge phenomenon, high production cost, low efficiency and small filling space. However, it leads to poor insulation strength and affects the service life and other problems. It provides a compact structure, convenient winding method, strong ability to resist lightning shock and operation shock, has strong interlayer insulation and terminal insulation, and the probability of partial discharge is similar to that of Zero cast epoxy dry-type transformer

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