KR20120010542A - composite bushing for decreasing electric field intensity - Google Patents
composite bushing for decreasing electric field intensity Download PDFInfo
- Publication number
- KR20120010542A KR20120010542A KR1020100072143A KR20100072143A KR20120010542A KR 20120010542 A KR20120010542 A KR 20120010542A KR 1020100072143 A KR1020100072143 A KR 1020100072143A KR 20100072143 A KR20100072143 A KR 20100072143A KR 20120010542 A KR20120010542 A KR 20120010542A
- Authority
- KR
- South Korea
- Prior art keywords
- bushing
- frp tube
- electric field
- lower flange
- frp
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/50—Insulators or insulating bodies characterised by their form with surfaces specially treated for preserving insulating properties, e.g. for protection against moisture, dirt, or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/58—Tubes, sleeves, beads, or bobbins through which the conductor passes
- H01B17/583—Grommets; Bushings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
- H02G15/103—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress
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- Insulators (AREA)
Abstract
The present invention relates to a bushing, in particular an ultra-high pressure bushing, comprising a FRP tube, an upper and a lower flange coupled to upper and lower ends of the FRP tube, and a housing formed outside the FRP tube. In order to suppress electric field concentration at the critical part connected to the enclosure, an inner shield made of metal is formed inside the FRP tube, and a semiconductive layer is formed on the inner surface of the FRP tube at a position corresponding to the upper end of the inner shield. An electric field relaxation-type composite bushing characterized by mitigating electric field concentration at a portion and an upper portion of the inner shield is a technical gist. As a result, it is possible to provide a bushing having high insulation performance by mitigating electric field concentration at a critical portion connected to an enclosure of a power device or at an interface at which each component is coupled to prevent damage to the FRP tube and deterioration of the external housing. .
Description
The present invention relates to a bushing, in particular an ultra-high pressure bushing, by providing a semi-conductivity in the fabrication of the inner shield and the FRP tube inside the FRP tube to mitigate the field concentration, the electric field in the critical region where the electric field is concentrated in the use of the ultra-high pressure bushing Field mitigation composite bushings to improve vulnerabilities.
In general, the bushing used in power devices (GIS, GCB, DS, etc.) is to insulate between the outer casing of the power device connected to the ground (ground) at the top of the high voltage applied.
1 shows a configuration of a conventional high voltage bushing, as shown, a high voltage bushing is basically a
First, the
In general, the
The shielding portion is generated in the lower portion of the bushing, that is, the portion connected to the ground of the enclosure of the power device, thereby causing electric field concentration at the lower side. Therefore, in order to suppress electric field concentration at the critical part of the bushing, an
The
However, the surface of the
The present invention is to solve the above problems, by providing a semi-conductivity in the manufacture of the inner shield and FRP tube inside the FRP tube to mitigate the field concentration, in the critical region where the electric field is concentrated in the use of the ultra-high pressure bushing Its purpose is to provide a field-relaxing composite bushing that improves electrical vulnerabilities.
In order to achieve the above object, the present invention, in the bushing comprising a FRP tube, upper and lower flanges coupled to the upper and lower ends of the FRP tube, and a housing formed outside the FRP tube, In order to suppress electric field concentration at the connected critical portion, an inner shield made of metal is formed inside the FRP tube, and a semiconductive layer is formed on the inner surface of the FRP tube at a position corresponding to an upper end portion of the inner shield. An electric field relaxation-type composite bushing, characterized in that the electric field concentration at the upper end of the inner shield is alleviated, is a technical gist.
In addition, the semiconductive layer is preferably formed of a carbon black film in a tapered shape on the inner surface of the FRP tube, the width is 5 ~ 200mm range, the thickness of the glass roving (glass roving) thickness of the FRP tube It is preferable that it is 2-3 times.
In addition, the FRP tube, the lower flange and the outer shield is preferably formed outside the lower flange of the interface portion to which the housing is coupled, the outer shield is formed spaced apart from the shed of the housing, It is preferably formed higher than the upper end of the lower flange. In addition, the outer shield is preferably formed of the same material as the lower flange, the upper end is preferably formed in an annular shape.
Here, the inner shield is formed in the 'L' shape is preferably coupled to the receiving portion formed in the lower end of the lower flange bottom surface is formed integrally with the lower flange.
By the above configuration, the present invention, the inner shield is formed inside the FRP tube to suppress the electric field concentration at the critical portion connected to the enclosure of the power equipment, the peninsula to mitigate the electric field concentration at the upper end (A) of the inner shield By constructing a solenoid FRP tube, it is possible to improve electrical weakness in critical areas where electric fields are concentrated in the use of ultra high pressure bushings, and to produce a bushing having high insulation performance by preventing damage to the insulating tube and deterioration of the outer housing. There is.
In addition, by forming an outer shield to mitigate field concentration in critical areas such as the interface where FRP tubes, housings, and metal flanges meet, the electric field concentrated in this area is moved to the upper end to prevent deterioration due to prolonged use. It has the effect of improving the reliability of the bushing by improving the dielectric breakdown performance.
In addition, since the inner shield inside the bushing is manufactured integrally with the metal flange, it is possible to manufacture an effective bushing by shortening the working time and the trouble occurring when the power device is combined.
1-Cross-sectional view of a conventional bushing.
2-a sectional view of the main part of a field-relaxing composite bushing according to the invention;
The present invention relates to a composite bushing for the ultra-high voltage power device, as shown in Figure 2, the
In particular, in order to suppress electric field concentration at the lower portion of the bushing, that is, the critical portion connected to the enclosure of the power equipment, the
Hereinafter, the
First, the
In general, in the case of the
The
As described above, the
The
In detail, in the filament winding process, a polyester liner is first applied to a mandrel, and then a carbon black film, which is a semiconductive material, is partially adhered to the upper portion A of the
That is, the
The use of the
In addition, the outer shield (outside the
In general, the most vulnerable part of the bushing is the interface part (B) where the
The
In addition, the position of the
The present invention configured as described above can improve the electrical weakness in the critical region in which the electric field is concentrated in the use of the
100: FRP tube 200: housing
210: Shed 300: Center conductor
500: lower flange 510: receiving portion
600: inner shield 700: semiconducting layer
800: outer shield
Claims (8)
In order to suppress electric field concentration at the critical part connected to the enclosure of the power device, an inner shield 600 made of metal is formed inside the FRP tube 100 and corresponds to an upper end A of the inner shield 600. A semi-conductive layer (700) is formed on the inner surface of the FRP (100) tube at a position, and the field relaxation type composite bushing is characterized in that it reduces the electric field concentration at the critical portion and the upper end (A) of the inner shield (600).
The field relaxation type composite bushing, characterized in that formed in the tapered shape on the inner surface of the FRP tube (100).
A field relaxing composite bushing, characterized in that formed from a carbon black film.
The width is in the range of 5 ~ 200mm, the thickness of the field relaxation type composite bushing, characterized in that two to three times the thickness of the glass roving (glass roving) of the FRP tube (100).
The field relaxation type composite bushing, characterized in that formed spaced apart from the shed 210 of the housing 200, than the upper end of the lower flange (500).
The field relaxation type composite bushing is formed of the same material as the lower flange 500, the upper end is formed in an annular shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20100072143A KR101172795B1 (en) | 2010-07-26 | 2010-07-26 | composite bushing for decreasing electric field intensity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20100072143A KR101172795B1 (en) | 2010-07-26 | 2010-07-26 | composite bushing for decreasing electric field intensity |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20120010542A true KR20120010542A (en) | 2012-02-03 |
KR101172795B1 KR101172795B1 (en) | 2012-08-09 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR20100072143A KR101172795B1 (en) | 2010-07-26 | 2010-07-26 | composite bushing for decreasing electric field intensity |
Country Status (1)
Country | Link |
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KR (1) | KR101172795B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110603697A (en) * | 2017-05-08 | 2019-12-20 | Abb瑞士股份有限公司 | Gas insulated wire, gas insulated switchgear and method therefor |
KR20200114713A (en) * | 2019-03-29 | 2020-10-07 | 대한전선 주식회사 | Dry type plug-in bushing for high-voltage installation |
WO2020204363A1 (en) * | 2019-03-29 | 2020-10-08 | 대한전선 주식회사 | Dry-type plug-in bushing, manufacturing method of same, and high-voltage installation comprising same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101247016B1 (en) | 2012-11-23 | 2013-03-25 | 주식회사 삼능 | Metering out fit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004120904A (en) | 2002-09-26 | 2004-04-15 | Mitsubishi Electric Corp | Gas-insulated voltage detection bushing |
KR100750067B1 (en) | 2006-03-17 | 2007-08-16 | 엘에스전선 주식회사 | Bushing for electric instrument able to be maximized the insulating performance |
KR101034878B1 (en) | 2009-11-19 | 2011-05-17 | 한국전기연구원 | High voltage bushings with improved insulating performance electric field relaxation |
-
2010
- 2010-07-26 KR KR20100072143A patent/KR101172795B1/en active IP Right Grant
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110603697A (en) * | 2017-05-08 | 2019-12-20 | Abb瑞士股份有限公司 | Gas insulated wire, gas insulated switchgear and method therefor |
CN110603697B (en) * | 2017-05-08 | 2021-08-03 | Abb电网瑞士股份公司 | Gas insulated wire, gas insulated switchgear and method therefor |
US11133653B2 (en) | 2017-05-08 | 2021-09-28 | Abb Power Grids Switzerland Ag | Gas-insulated line, gas-insulated switchgear and method thereof |
KR20200114713A (en) * | 2019-03-29 | 2020-10-07 | 대한전선 주식회사 | Dry type plug-in bushing for high-voltage installation |
WO2020204363A1 (en) * | 2019-03-29 | 2020-10-08 | 대한전선 주식회사 | Dry-type plug-in bushing, manufacturing method of same, and high-voltage installation comprising same |
Also Published As
Publication number | Publication date |
---|---|
KR101172795B1 (en) | 2012-08-09 |
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