CN201278305Y - Shielding cap for transformer - Google Patents

Abstract

A shielding cap for a transformer belongs to the technical field of manufacturing of transformer accessories and mainly comprises a cap body (1), a cap bottom (2) with bolt holes (3) and the like. The utility model relates to a rationally, the appearance is pleasing to the eye, simple structure, convenient operation enables because of the insulation fault greatly reduced of partial discharge production, has reduced insulation fault.

Description

A kind of transformer shielding cap

Technical field

The utility model relates to a kind of transformer shielding cap, belongs to the manufacturing technology field of transformer matching component.

Background technology

Large oil immersed power transformer is one of capital equipment of electric power system, is the nucleus equipment of transformer station.The fault of present large oil immersed power transformer studies show that mainly based on insulation fault partial discharge is the main cause that produces insulation fault.Partial discharge is excessive to be caused not only that the turn insulation large tracts of land punctures and burns, and may cause turn-to-turn, layer short circuit, and this situation is seen in the high-power transformer accident often.

Summary of the invention

The purpose of this utility model provides a kind of reasonable in design, and is simple in structure, the tangible transformer shielding cap of result of use.

The utility model is a kind of transformer shielding cap, it is characterized in that by constituting at the bottom of the cap in cap body and strap bolt hole etc.

Studies show that, the factor that causes partial discharge has a lot, wherein the wedge angle burr of electric conductor and electrical insulator is the key factor that produces partial discharge, in transformer inside, wedge angle burr on the securing member around the charged body of whole transformer is easy to generate the wedge angle discharge most, especially the partial discharge harm of the wedge angle of bolt upper cap nut, screw thread and nut generation is very serious, so the wedge angle burr of shielding bolt, nut is particularly important.The utility model is reasonable in design, and good looking appearance is simple in structure, and is easy to operate, and the insulation fault that produces because of partial discharge is reduced greatly, has reduced insulation fault.

Description of drawings

Fig. 1 is an overall structure front view of the present utility model;

Fig. 2 is an overall structure left view of the present utility model;

Fig. 3 is a user mode schematic diagram of the present utility model.

Embodiment

The utility model is mainly by 2 etc. constituting at the bottom of the cap in cap body 1 and strap bolt hole 3.

During use, earlier bolt 7 is passed at the bottom of the shielding cap cap 2 bolt hole 3, pass folder 4 and connecting plate 5 again, pass the bolt hole 3 at the bottom of another shielding cap cap at last, the nut 6 of screwing on, at last with 2 bendings respectively at the bottom of the cap of two shielding caps at bolt 7 two ends, cap body 1 is covered on bolt 7 and nut 6, like this bolt 7 and nut 6 just fully tegmentum in the cap body 1 of shielding cap, reach the effect of shielding bolt 7 and nut 6, the discharge that makes wedge angle burr on bolt 7 and the nut 6 produce can not have influence on the partial discharge of transformer.

Claims (1)

1, a kind of transformer shielding cap is characterized in that being made of (2) at the bottom of the cap of cap body (1) and strap bolt hole (3).

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