Homogenizing electric field bushing subassembly and transformer bushing
A bushing and component technology, applied in the direction of transformer/inductor coil/winding/connection, etc., can solve the problem of partial discharge of lower flange and insulating tube, and achieve the effect of preventing field intensity distortion, uniform electric field distribution, and preventing partial discharge. Effect
Pending Publication Date: 2019-06-07
JIANGSU SHENMA ELECTRIC CO LTD
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Problems solved by technology
[0003] The technical problem mainly solved by the present invention is to provide a bushing assembly and a transformer bushing for homogenizing electric field, which can solve the problem that there is a gap between the lower flange and the porcelain bushing, and that the gap between the lower flange and the insulating tube is easily caused by poor glue installation. Partial Discharge Problem
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0021] see Figure 1 to Figure 2 , figure 1 is a partial cross-sectional structural schematic diagram of an embodiment of the bushing assembly of the present invention; figure 2 yes figure 1 Schematic diagram of the enlarged structure in part A; image 3 yes figure 1 Schematic diagram of the enlarged structure in part B.
[0022] Such as figure 1 with figure 2 As shown, an embodiment of the bushing assembly 01 of the present invention includes an insu...
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The invention relates to the field of electricity transmission insulation equipment, and specifically discloses a homogenizing electric field bushing subassembly. The bushing subassembly comprises aninsulation tube, a composite wrap, and a lower flange, wherein the composite wrap is fixed outside the insulation tube in a sleeving mode, the tail end of the insulation tube extends out of the composite wrap, the lower flange is fixed outside the insulation pipe and the composite wrap in a sleeving mode, the insulation tube is provided with the outer wall provided with a semi-conductive layer, ofthe lower flange in a sleeving mode, and the semi-conductive layer is electrically connected with the lower flange. According to the homogenizing electric field bushing subassembly and transformer bushing, the semi-conductive layer is used for homogenizing an electric field, the semi-conductive layer is electrically connected with the lower flange to make the semi-conductive layer and the lower flange can be equal potential, and partial discharge between the insulation tube and the lower flange due to improper gluing or gap existing is prevented. The composite wrap replaces a porcelain wrap,the quality is reduced, and installation is more convenient; a gap between the composite wrap and the lower flange is filled with a same composite material as the composite wrap, thus the gap betweenthe composite wrap and the lower flange is avoided, and partial discharge is prevented.
Description
technical field [0001] The invention relates to the field of power transmission insulation equipment, in particular to a bushing assembly for homogenizing electric field and a transformer bushing. Background technique [0002] The power input and output ends of power transformers usually use low-voltage, high-current transformer bushings. In the prior art, low-voltage transformer bushings usually use porcelain bushings as outer insulation. Porcelain bushings have disadvantages such as heavy weight, difficult installation, and low pollution flashover resistance. At the same time, there is a gap between the lower flange and the porcelain sleeve, which cannot be filled during the oil filling process, which may easily lead to partial discharge there. In addition, the lower flange and the insulating tube are fixed by glue, and air bubbles are easily generated at the glue, which may cause partial discharge. Contents of the invention [0003] The technical problem mainly solved...
Claims
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IPC IPC(8): H01F27/32H01F27/29
Inventor 马斌孙略孙中源张瑞敏刘闯高俊
Owner JIANGSU SHENMA ELECTRIC CO LTD