CN111640558A - Sleeve CT for small-capacity transformer 10KV side pure porcelain cable-through sleeve - Google Patents
Sleeve CT for small-capacity transformer 10KV side pure porcelain cable-through sleeve Download PDFInfo
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- CN111640558A CN111640558A CN202010518622.9A CN202010518622A CN111640558A CN 111640558 A CN111640558 A CN 111640558A CN 202010518622 A CN202010518622 A CN 202010518622A CN 111640558 A CN111640558 A CN 111640558A
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- sleeve
- lifting seat
- small
- bushing
- cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The invention discloses a bushing CT for a 10KV side pure-porcelain cable-through bushing of a small-capacity transformer, which comprises a bushing CT, a large-aperture insulating end ring, a small-aperture insulating end ring, a steel supporting plate, a lifting screw, a nut, a lifting seat, a bushing tail end, a cable and a CT wiring terminal, wherein the large-aperture insulating end ring is sleeved in the tail end of the pure-porcelain bushing; the invention is characterized in that the structure form is flexible, the invention is suitable for the common pure porcelain cable-through type sleeve of a small-capacity transformer, solves the problem of limitation caused by small product volume, large diameter of the tail end of the sleeve and the like, the inner diameter of the CT is smaller, the height is greatly reduced, the height of a lifting seat is controlled, and the whole device has the characteristics of high flexibility, stable structure and low production cost.
Description
Technical Field
The invention relates to the field of transformer equipment, in particular to a bushing CT for a 10KV side pure porcelain cable bushing of a small-capacity transformer.
Background
At present, the domestic small-sized oil-immersed transformer is limited by the factors of small volume, insufficient box cover arrangement space and the like, a Current Transformer (CT) for 10KV side protection and measurement is an external dry-type current transformer and is usually installed in a high-voltage cabinet or penetrates through a high-voltage side leading-out cable to be fixed on a transformer body, the current transformer cannot be matched with a pure porcelain cable penetrating type sleeve to be arranged in a sleeve lifting seat, the form is single, and the limitation is large.
The reason for this situation is related to the structural characteristics of the pure porcelain cable-through bushing and the compact case cover space of the small-capacity transformer, because of the cost limitation of the small-capacity transformer, sufficient installation space cannot be provided for the built-in bushing CT by increasing the case cover, the pure porcelain cable-through bushing is installed on the high-voltage side of the case cover, the outer diameter of the tail porcelain bushing is larger than the case cover space, so that the inner diameter of the transformer sleeved on the tail porcelain bushing is too large, the outer diameter of the transformer is too small, the design height is too high (even higher than the overall height of the high-voltage bushing), and the appearance and the overall mechanical strength cannot meet the requirements.
Meanwhile, the external dry current transformer has the following disadvantages:
when the high-voltage cabinet is arranged in, the temperature rise of the high-voltage cabinet can be increased, and the service life of an electronic element is influenced.
When the box cover is arranged in the box cover, the requirement on rain prevention and moisture prevention is high, the cost is improved, the box cover can stand the sun and rain for a long time, the insulating material is fast aged, and the service life is not guaranteed.
Disclosure of Invention
In order to solve the problems, the invention provides a bushing CT for a 10 KV-side pure porcelain cable-through bushing of a small-capacity transformer, which can be matched and assembled with the pure porcelain cable-through bushing and ensures that the bushing CT has a reasonable inner-outer diameter proportion and a reasonable design height. The technical scheme adopted by the method is as follows:
a bushing CT for a 10KV side pure-porcelain cable-through bushing of a small-capacity transformer comprises a bushing CT, a small-aperture insulating end ring, a large-aperture insulating end ring, a steel supporting plate, a hanging screw, a nut, a lifting seat, a bushing tail end, a cable and a CT terminal board;
the sleeve CT is placed below the tail end of the sleeve and sleeved on the cable, a large-aperture insulating end ring is arranged between the sleeve CT and an upper cover plate of the lifting seat at the upper end, a small-aperture insulating end ring is arranged between the sleeve CT and a steel supporting plate at the lower end, the steel supporting plate is connected with the upper cover plate of the lifting seat at the upper end through a hanging screw, the sleeve CT is connected with a CT terminal board, the sleeve CT is arranged in the lifting seat, and the CT terminal board is fixedly arranged at the side part of the lifting seat.
The outer diameters of the sleeve CT, the small-aperture insulating end ring and the large-aperture insulating end ring are the same.
The lifting seat is a sleeve lifting seat for a pure ceramic cable-through sleeve, the whole lifting seat is in a square barrel shape or a cylindrical shape, the tail end of the sleeve extends into the lifting seat, a cable is arranged between the tail end of the sleeve and the bottom of the lifting seat, and the lower end of the lifting seat is fixed on a transformer body or a high-voltage cabinet.
The invention adopts a built-in sleeve CT, a large-aperture end ring is sleeved on the tail end of a pure porcelain sleeve, and the accumulated thickness of the large-aperture end ring is slightly larger than the length of the tail end of the sleeve; a gap is arranged between the steel supporting plate and the bottom of the lifting seat; the cable is sleeved in the bushing CT firstly, the small-aperture end ring is sleeved in the bushing CT next to the small-aperture end ring, the bushing CT is arranged between the bushing CT and the steel supporting plate, the hanging screw rod, the thick nut, the thin nut and the flat pad are fixed on the top cover plate of the lifting seat, and finally the bushing CT lead is led out of the lifting seat through the CT wiring terminal.
The invention has the beneficial effects that: the scheme breaks through the limitation that the bushing CT can not be matched with a pure porcelain bushing of a small oil-immersed transformer for use, and saves the limited layout space on a high-voltage cabinet or a transformer body; the scheme can be matched with pure porcelain cable-penetrating type sleeves of different sizes for use, optimizes the CT assembly layout and the overall structure of the sleeve, and has the characteristics of flexible form, simplicity and convenience in operation, stable structure and cost saving.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
As shown in the accompanying drawings: 1-sleeve CT, 2-small aperture insulating end ring, 3-large aperture insulating end ring, 4-steel supporting plate, 5-hanging screw, 6-thick nut, 9-lifting seat, 10-sleeve tail end, 11-cable, 12-CT terminal board.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in the attached drawings, a bushing CT for a small-capacity transformer 10 KV-side pure porcelain cable bushing comprises: the device comprises a sleeve CT1, a small-aperture insulating end ring 2, a large-aperture insulating end ring 3, a steel supporting plate 4, a hanging screw rod 5, a nut 6, a thin nut, a flat pad, a lifting seat 9, a sleeve tail end 10, a cable 11 and a CT terminal board 12.
The sleeve CT is placed below the tail end of the sleeve and sleeved on the cable, a large-aperture insulating end ring is arranged between the sleeve CT and an upper cover plate of the lifting seat at the upper end, a small-aperture insulating end ring is arranged between the sleeve CT and a steel supporting plate at the lower end, the steel supporting plate is connected with the upper cover plate of the lifting seat at the upper end through a hanging screw, the sleeve CT is connected with a CT terminal board, the sleeve CT1 is arranged in the lifting seat 9, and the CT terminal board is fixedly arranged at the side part of the lifting seat.
The outer diameters of the sleeve CT1, the small-aperture insulating end ring 2 and the large-aperture insulating end ring 3 are the same.
The lifting seat 9 is a sleeve lifting seat for a pure porcelain cable-through sleeve, the whole lifting seat is in a square barrel shape or a cylindrical shape, the tail end 10 of the sleeve extends into the lifting seat 9, a cable 11 is arranged between the tail end 10 of the sleeve and the bottom of the lifting seat 9, and the lower end of the lifting seat 9 is fixed on a transformer body or a high-voltage cabinet.
Firstly, mounting a pure porcelain cable-through type sleeve on a lifting seat 9, sleeving a large-aperture end ring 3 into the tail end 10 of the sleeve, wherein the accumulated thickness of the large-aperture end ring is slightly larger than the length of the tail end 10 of the sleeve; then, the sleeve CT1 and the small-aperture end ring 2 are sleeved into the cable 11 through which the sleeve passes, and the small-aperture end ring 2 is arranged between the sleeve CT1 and the steel supporting plate 4; and finally, fixing a steel supporting plate 4, a hanging screw rod 5, a nut 6, a thin nut and a flat pad on a top cover plate of the lifting seat 9, matching the thin nut and the flat pad with the nut 6 for use, and leading a lead-out wire of the bushing CT1 out of the lifting seat 9 through a CT wiring terminal 12 to complete the bushing CT assembly.
The invention has the characteristics of flexible structural form, suitability for a pure porcelain cable-through type sleeve commonly used for a small-capacity transformer, and solves the problems of overlarge height and poor stability of the sleeve CT due to the limitation of factors such as small product volume, large diameter of the tail end of the sleeve and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should be construed as the protection scope of the present invention without inventive effort.
Claims (4)
1. The utility model provides a bushing CT for pure porcelain cable bushing formula sleeve pipe in small capacity transformer 10KV side which characterized in that: the device comprises a sleeve CT, a small-aperture insulating end ring, a large-aperture insulating end ring, a steel supporting plate, a hanging screw, a nut, a lifting seat, a sleeve tail end, a cable and a CT terminal board;
the sleeve CT is placed below the tail end of the sleeve and sleeved on the cable, a large-aperture insulating end ring is arranged between the sleeve CT and an upper cover plate of the lifting seat at the upper end, a small-aperture insulating end ring is arranged between the sleeve CT and a steel supporting plate at the lower end, the steel supporting plate is connected with the upper cover plate of the lifting seat at the upper end through a hanging screw, the sleeve CT is connected with a CT terminal board, the sleeve CT is arranged in the lifting seat, and the CT terminal board is fixedly arranged at the side part of the lifting seat.
2. The small-capacity transformer 10KV side pure porcelain bushing CT according to claim 1, characterized in that: the outer diameters of the sleeve CT, the small-aperture insulating end ring and the large-aperture insulating end ring are the same.
3. The small-capacity transformer 10KV side pure porcelain bushing CT according to claim 1, characterized in that: the lifting seat is a sleeve lifting seat for a pure ceramic cable-through sleeve, the whole lifting seat is in a square barrel shape or a cylindrical shape, the tail end of the sleeve extends into the lifting seat, a cable is arranged between the tail end of the sleeve and the bottom of the lifting seat, and the lower end of the lifting seat is fixed on a transformer body or a high-voltage cabinet.
4. The small-capacity transformer 10KV side pure porcelain bushing CT according to claim 1, characterized in that: the large-aperture end ring is sleeved on the tail end of the pure porcelain sleeve, and the accumulated thickness of the large-aperture end ring is larger than the length of the tail end of the sleeve; a gap is arranged between the steel supporting plate and the bottom of the lifting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518622.9A CN111640558B (en) | 2020-06-09 | 2020-06-09 | Sleeve CT for small-capacity transformer 10KV side pure porcelain cable-through sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518622.9A CN111640558B (en) | 2020-06-09 | 2020-06-09 | Sleeve CT for small-capacity transformer 10KV side pure porcelain cable-through sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111640558A true CN111640558A (en) | 2020-09-08 |
| CN111640558B CN111640558B (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010518622.9A Active CN111640558B (en) | 2020-06-09 | 2020-06-09 | Sleeve CT for small-capacity transformer 10KV side pure porcelain cable-through sleeve |
Country Status (1)
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| CN (1) | CN111640558B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB759708A (en) * | 1953-08-13 | 1956-10-24 | Reyrolle & Company Ltd | Improvements relating to high-voltage switchgear |
| CN201084511Y (en) * | 2007-08-01 | 2008-07-09 | 山东达驰电气股份有限公司 | A transformer-lifting seat structure |
| CN202008923U (en) * | 2011-03-01 | 2011-10-12 | 辽宁华冶集团发展有限公司 | Tie rod elevating seat used in sleeve current transformer |
| CN202093968U (en) * | 2011-03-14 | 2011-12-28 | 王伟坤 | Electronic sleeve current mutual inductor assembled in high-voltage transformer |
| CN202339785U (en) * | 2011-12-09 | 2012-07-18 | 山东电力设备有限公司 | Ascending flanged base |
| CN103065766A (en) * | 2012-12-14 | 2013-04-24 | 常州东芝舒电变压器有限公司 | Plug-in type cable lifting seat |
| CN203910420U (en) * | 2014-06-20 | 2014-10-29 | 中国西电电气股份有限公司 | Ascending flanged base for 500kV and over-500kV transformers |
| CN104733157A (en) * | 2015-03-30 | 2015-06-24 | 国家电网公司 | Simple installation structure of current transformer of transformer and installation method thereof |
| CN206893389U (en) * | 2017-05-10 | 2018-01-16 | 特变电工沈阳变压器集团有限公司 | A kind of power transformer enclosure exhaust structure |
| CN206976115U (en) * | 2017-07-31 | 2018-02-06 | 山东泰开箱变有限公司 | A kind of small capacity transformer dedicated built-in cannula C T rise seat |
| CN208970264U (en) * | 2018-10-26 | 2019-06-11 | 特变电工智能电气有限责任公司 | A kind of power transformer enclosure structure and the transformer containing the structure |
| CN110890201A (en) * | 2018-09-10 | 2020-03-17 | 特变电工沈阳变压器集团有限公司 | Three-phase shunt reactor lead wire connection structure |
| CN210535493U (en) * | 2019-11-08 | 2020-05-15 | 保定保菱变压器有限公司 | Built-in current transformer structure |
-
2020
- 2020-06-09 CN CN202010518622.9A patent/CN111640558B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB759708A (en) * | 1953-08-13 | 1956-10-24 | Reyrolle & Company Ltd | Improvements relating to high-voltage switchgear |
| CN201084511Y (en) * | 2007-08-01 | 2008-07-09 | 山东达驰电气股份有限公司 | A transformer-lifting seat structure |
| CN202008923U (en) * | 2011-03-01 | 2011-10-12 | 辽宁华冶集团发展有限公司 | Tie rod elevating seat used in sleeve current transformer |
| CN202093968U (en) * | 2011-03-14 | 2011-12-28 | 王伟坤 | Electronic sleeve current mutual inductor assembled in high-voltage transformer |
| CN202339785U (en) * | 2011-12-09 | 2012-07-18 | 山东电力设备有限公司 | Ascending flanged base |
| CN103065766A (en) * | 2012-12-14 | 2013-04-24 | 常州东芝舒电变压器有限公司 | Plug-in type cable lifting seat |
| CN203910420U (en) * | 2014-06-20 | 2014-10-29 | 中国西电电气股份有限公司 | Ascending flanged base for 500kV and over-500kV transformers |
| CN104733157A (en) * | 2015-03-30 | 2015-06-24 | 国家电网公司 | Simple installation structure of current transformer of transformer and installation method thereof |
| CN206893389U (en) * | 2017-05-10 | 2018-01-16 | 特变电工沈阳变压器集团有限公司 | A kind of power transformer enclosure exhaust structure |
| CN206976115U (en) * | 2017-07-31 | 2018-02-06 | 山东泰开箱变有限公司 | A kind of small capacity transformer dedicated built-in cannula C T rise seat |
| CN110890201A (en) * | 2018-09-10 | 2020-03-17 | 特变电工沈阳变压器集团有限公司 | Three-phase shunt reactor lead wire connection structure |
| CN208970264U (en) * | 2018-10-26 | 2019-06-11 | 特变电工智能电气有限责任公司 | A kind of power transformer enclosure structure and the transformer containing the structure |
| CN210535493U (en) * | 2019-11-08 | 2020-05-15 | 保定保菱变压器有限公司 | Built-in current transformer structure |
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| Publication number | Publication date |
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| CN111640558B (en) | 2022-08-02 |
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