Gas current transformer

Abstract

The invention relates to a gas current transformer, in particular to an inverted SF6 (Sulfur Hexafluoride) gas insulated current transformer with a voltage of 35-500 kV, belonging to the technical field of a transformer. The technical scheme provided by the invention is as follows: the gas current transformer comprises a primary conductor (1), a shielding cover for a secondary winding (2), a disk-type insulator (3), a high-potential shielding cylinder (4), a shielding tube of a lead-out wire of the secondary winding (5), a compound hollow insulator (6), an SF6 gas (7), a base (8) and the like; the upper end of the shielding tube of the lead-out wire of the secondary winding is leveled and parallel to the upper end of the disk-type insulator; an insulating sleeve (9) is sealed and fixed on the upper end of the shielding tube of the lead-out wire of the secondary winding; and a gap is reserved between the insulating sleeve and the disk-type insulator. In the gas current transformer provided by the invention, the insulation reliability between the shielding tube of the lead-out wire of the secondary winding and the disk-type insulator is improved so that the insulation reliability of the transformer is ensured. Compared with the prior art, the gas current transformer provided by the invention has advantages of material saving, simple and novel structure, convenience for manufacture and installation, and safeness and reliability in the insulation performance.

Description

technical field [0001] The invention relates to a gas current transformer, especially a 35-500kV inverted SF 6 A gas-insulated current transformer belongs to the technical field of transformers. Background technique [0002] In the background technology, 35-500kV inverted SF 6 A gas insulated current transformer generally consists of a primary conductor, a casing, a secondary winding shield, a secondary winding, a secondary winding lead wire shielding tube, a high potential shielding cylinder, a base, a porcelain sleeve (or a hollow composite insulator), an SF 6 Composed of gas, pot insulators, etc., the secondary winding lead wire shielding tube extends into the pot insulator, the upper end of the shielding tube is relatively close to the pot insulator insulation distance, especially for products above 220kV, the shielding tube is very long and needs to lie down During transportation, the shielding tube is prone to deflection, which will cause insulation breakdown of the ...

AI Technical Summary

Problems solved by technology

[0002] In the background technology, 35-500kV inverted SF 6 A gas insulated current transformer generally consists of a primary conductor, a shell, a secondary winding shield, a secondary winding, a secondary winding lead wire shielding tube, a high potential shielding cylinder, a base, a porcelain sleeve (or a hollow composite insulator), an SF 6 Composed of gas, pot insulators, etc., the secondary winding lead wire shielding tube extends into the pot insulator, the upper end of the shielding tube is close to the pot insulator insulation distance, especially for products above 220kV, the shielding tube is very long and needs to lie down During transportation, the shielding tube is prone to deflection, which will cause insulation breakdown of the shielding tube to the pot insulator, affecting product quality and safety performance

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