CN104576006A - Current transformer being able to reduce local discharge and manufacturing method thereof - Google Patents
Current transformer being able to reduce local discharge and manufacturing method thereof Download PDFInfo
- Publication number
- CN104576006A CN104576006A CN201510006736.4A CN201510006736A CN104576006A CN 104576006 A CN104576006 A CN 104576006A CN 201510006736 A CN201510006736 A CN 201510006736A CN 104576006 A CN104576006 A CN 104576006A
- Authority
- CN
- China
- Prior art keywords
- metallic shield
- shield cylinder
- secondary coil
- current transformer
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 239000003822 epoxy resin Substances 0.000 claims abstract description 8
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 8
- 239000004065 semiconductor Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000005422 blasting Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 239000002966 varnish Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 235000008429 bread Nutrition 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000005684 electric field Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract 5
- 229910052751 metal Inorganic materials 0.000 abstract 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 239000003973 paint Substances 0.000 abstract 2
- 238000005270 abrasive blasting Methods 0.000 abstract 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
Landscapes
- Transformers For Measuring Instruments (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
A current transformer being able to reduce local discharge comprises a housing, a secondary coil, a framework, an annular iron core, and a metal shielding barrel; the secondary coil is wrapped on the framework; the annular framework is sleeved on the annular iron core; the outer surface of the secondary coil is wrapped by an entire piece of semiconductor electric cloth; the outer surface of the metal shielding barrel is coated with a semi-conductive paint layer after being processed with abrasive blasting; the metal shielding barrel is fixed inside the housing by the semi-conductive paint layer; the metal shielding barrel is integrally connected with high-voltage lead wires, and casted into an integral structure, i.e., the housing, by epoxy resin; and the housing is closely and seamlessly fitted to the secondary coil, the metal shielding barrel and the high-voltage lead wires. Further provided is a manufacturing method of the current transformer. The electric field structure of the current transformer is very even; the micro-gap discharge, point discharge and lead wire discharge are reduced.
Description
Technical field
The present invention relates to electric equipment and manufacture field thereof, particularly a kind of current transformer and manufacture method thereof that can reduce partial discharge.
Background technology
In electric power system, large-scale bus-type current transformer, the office often because of instrument transformer is high-volume too high, and the long-term safety stability of influential system.Threaten the reliability of power supply.This type structure instrument transformer generally adopts the method for outsourcing conducting paper and outer brush semiconductive varnish at present, and reduce local and balanced electric field, effect is not very desirable.For this situation, a kind of novel current transformer has been invented by my company, partial discharge quantity can be eliminated substantially, decrease the potential safety hazard of long-time running.
Summary of the invention
The object of the invention is, provide a kind of current transformer and the manufacture method thereof that can reduce partial discharge, its structure is simple, and easy to use, cost is low, easily processing in enormous quantities;
The technical scheme adopted is:
A kind of current transformer that can reduce partial discharge, comprise shell, secondary coil, skeleton, annular core and metallic shield cylinder, described secondary coil winding is on skeleton, skeleton is set on annular core, metallic shield cylinder is located in the endoporus of annular core, the appearance bread of secondary coil is provided with the semi-conductor electricity cloth of whole, outer surface through the metallic shield cylinder of blasting treatment is coated with semiconductive enamelled coating, metallic shield cylinder is fixed on the inside of shell by semiconductive enamelled coating, metallic shield cylinder is connected with high-voltage connection, an overall structure is poured into epoxy resin, be shell, and shell and semi-conductor electricity cloth, metallic shield cylinder and the laminating of high-voltage connection closed seamless.
Described metallic shield cylinder can be copper cylinder.
A manufacture method for the current transformer of partial discharge can be reduced, comprise the following steps:
The first, the semiconductive cloth of whole is evenly wrapped up on the outer surface being set in the secondary coil on annular core;
The second, high-voltage connection has abandoned traditional welding method, uses copper insert to cast directly on metallic shield cylinder, becomes an overall structure with metallic shield cylinder;
Three, the outer surface of metallic shield cylinder is carried out blasting treatment, then spray semiconductive varnish;
Four, one casting epoxy resin, the shell formed and secondary coil, metallic shield cylinder and high-voltage connection structure in aggregates, to obtain final product.
The invention has the advantages that:
1, adopt copper metallic shield barrel structure, make electric field structure extremely even.
2, seamless combination between epoxy resin and metallic shield cylinder, reduces microscopic gaps electric discharge.
3, secondary coil adopts whole semiconductive cloth wrapping method, makes high-tension shielding cylinder with between low-pressure secondary coil, completely in equal distribution state between different parts, can not make electric field local distortion and produce point discharge.
4, high-voltage connection has abandoned traditional welding method, and uses copper insert directly to pour into a mould integrative-structure, prevents lead-in wire electric discharge.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of current transformer that can reduce partial discharge, comprise shell 1, secondary coil 2, skeleton 3, annular core 4 and metallic shield cylinder 5, the winding of described secondary coil 2 is on skeleton 3, skeleton 3 is set on annular core 4, metallic shield cylinder 5 is located in the endoporus of annular core 4, the appearance bread of secondary coil 2 is provided with the semi-conductor electricity cloth 6 of whole, outer surface through the metallic shield cylinder 5 of blasting treatment is coated with semiconductive enamelled coating 7, metallic shield cylinder 5 is fixed on the inside of shell 1 by semiconductive enamelled coating 7, metallic shield cylinder 5 is connected with high-voltage connection 8, an overall structure is poured into epoxy resin, be shell 1, and shell 1 and semi-conductor electricity cloth 6, metallic shield cylinder 5 and the laminating of high-voltage connection 8 closed seamless.
Described metallic shield cylinder 5 can be copper cylinder.
A kind of manufacture method that can reduce the current transformer of partial discharge according to claim 1, comprises the following steps:
The first, the semiconductive cloth 6 of whole is evenly wrapped up on the outer surface of the secondary coil 2 be set on annular core 4;
The second, high-voltage connection 8 has abandoned traditional welding method, uses copper insert to cast directly on metallic shield cylinder 5, becomes an overall structure with metallic shield cylinder 5;
Three, the outer surface of metallic shield cylinder 5 is carried out blasting treatment, then spray semiconductive varnish;
Four, one casting epoxy resin, the shell 1 and secondary coil 2, metallic shield cylinder 5 and high-voltage connection 8 structure in aggregates that are formed, to obtain final product.
Claims (3)
1. one kind can be reduced the current transformer of partial discharge, comprise shell (1), secondary coil (2), skeleton (3), annular core (4) and metallic shield cylinder (5), described secondary coil (2) winding is on skeleton (3), skeleton (3) is set on annular core (4), it is characterized in that: metallic shield cylinder (5) is located in the endoporus of annular core (4), the appearance bread of secondary coil (2) is provided with the semi-conductor electricity cloth (6) of whole, outer surface through the metallic shield cylinder (5) of blasting treatment is coated with semiconductive enamelled coating (7), metallic shield cylinder (5) is fixed on the inside of shell (1) by semiconductive enamelled coating (7), metallic shield cylinder (5) is connected with high-voltage connection (8), an overall structure is poured into epoxy resin, be shell (1), and shell (1) and semi-conductor electricity cloth (6), metallic shield cylinder (5) and the laminating of high-voltage connection (8) closed seamless.
2. a kind of current transformer that can reduce partial discharge according to claim 1, is characterized in that: described metallic shield cylinder (5) is copper cylinder.
3. a kind of manufacture method that can reduce the current transformer of partial discharge according to claim 1, is characterized in that, comprise the following steps:
The first, the semiconductive cloth (6) of whole is evenly wrapped up on the outer surface being set in the secondary coil (2) on annular core (4);
The second, high-voltage connection (8) has abandoned traditional welding method, uses copper insert to cast directly on metallic shield cylinder (5), becomes an overall structure with metallic shield cylinder (5);
Three, the outer surface of metallic shield cylinder (5) is carried out blasting treatment, then spray semiconductive varnish;
Four, one casting epoxy resin, the shell formed (1) and secondary coil (2), metallic shield cylinder (5) and high-voltage connection (8) structure in aggregates, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510006736.4A CN104576006B (en) | 2015-01-08 | 2015-01-08 | A kind of current transformer that can reduce shelf depreciation and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510006736.4A CN104576006B (en) | 2015-01-08 | 2015-01-08 | A kind of current transformer that can reduce shelf depreciation and manufacture method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104576006A true CN104576006A (en) | 2015-04-29 |
| CN104576006B CN104576006B (en) | 2016-09-28 |
Family
ID=53091835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510006736.4A Active CN104576006B (en) | 2015-01-08 | 2015-01-08 | A kind of current transformer that can reduce shelf depreciation and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104576006B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328359A (en) * | 2016-08-31 | 2017-01-11 | 刘连营 | Primary winding bobbin, production method thereof and voltage transformer manufacturing method |
| CN108369859A (en) * | 2015-12-18 | 2018-08-03 | Abb瑞士股份有限公司 | Current transformer for high pressure gas insulated switching installation substation |
| CN109585141A (en) * | 2019-02-21 | 2019-04-05 | 厦门涛福精密机械有限公司 | A kind of current transformer |
| CN110993285A (en) * | 2019-11-06 | 2020-04-10 | 大连第二互感器集团有限公司 | Voltage transformer and manufacturing method thereof |
| CN113990632A (en) * | 2021-12-24 | 2022-01-28 | 江苏东方四通科技股份有限公司 | Shielding shell and framework structure and transformer with shielding shell and framework structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4471333A (en) * | 1981-04-28 | 1984-09-11 | Sprecher & Schuh Ag | Current transformer with a ring-shaped core for use in a high voltage switching device enclosed in a metallic casing |
| EP0315835A1 (en) * | 1987-11-09 | 1989-05-17 | Mwb Messwandler-Bau Ag | High-voltage potential tranformer |
| CN201549358U (en) * | 2009-10-28 | 2010-08-11 | 大连中广互感器制造有限公司 | High-capacity voltage transformer capable of reducing local electric discharge |
| CN201796675U (en) * | 2010-01-22 | 2011-04-13 | 武汉平高网络电气有限公司 | Broadband square-wave transformer for measurement and protection |
| CN202534496U (en) * | 2012-03-07 | 2012-11-14 | 北京瑞奇恩互感器设备有限公司 | Electronic current-voltage transformer |
| CN102867637A (en) * | 2012-09-17 | 2013-01-09 | 熊江咏 | Electronic voltage transformer matched with high-voltage GIS |
| CN203799857U (en) * | 2014-03-20 | 2014-08-27 | 大连中广互感器制造有限公司 | Low-partial-discharge high-capacity post type current transformer |
-
2015
- 2015-01-08 CN CN201510006736.4A patent/CN104576006B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4471333A (en) * | 1981-04-28 | 1984-09-11 | Sprecher & Schuh Ag | Current transformer with a ring-shaped core for use in a high voltage switching device enclosed in a metallic casing |
| EP0315835A1 (en) * | 1987-11-09 | 1989-05-17 | Mwb Messwandler-Bau Ag | High-voltage potential tranformer |
| CN201549358U (en) * | 2009-10-28 | 2010-08-11 | 大连中广互感器制造有限公司 | High-capacity voltage transformer capable of reducing local electric discharge |
| CN201796675U (en) * | 2010-01-22 | 2011-04-13 | 武汉平高网络电气有限公司 | Broadband square-wave transformer for measurement and protection |
| CN202534496U (en) * | 2012-03-07 | 2012-11-14 | 北京瑞奇恩互感器设备有限公司 | Electronic current-voltage transformer |
| CN102867637A (en) * | 2012-09-17 | 2013-01-09 | 熊江咏 | Electronic voltage transformer matched with high-voltage GIS |
| CN203799857U (en) * | 2014-03-20 | 2014-08-27 | 大连中广互感器制造有限公司 | Low-partial-discharge high-capacity post type current transformer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108369859A (en) * | 2015-12-18 | 2018-08-03 | Abb瑞士股份有限公司 | Current transformer for high pressure gas insulated switching installation substation |
| CN106328359A (en) * | 2016-08-31 | 2017-01-11 | 刘连营 | Primary winding bobbin, production method thereof and voltage transformer manufacturing method |
| CN106328359B (en) * | 2016-08-31 | 2019-07-05 | 刘连营 | A kind of first winding skeleton and its production method and voltage transformer production method |
| CN109585141A (en) * | 2019-02-21 | 2019-04-05 | 厦门涛福精密机械有限公司 | A kind of current transformer |
| CN110993285A (en) * | 2019-11-06 | 2020-04-10 | 大连第二互感器集团有限公司 | Voltage transformer and manufacturing method thereof |
| CN113990632A (en) * | 2021-12-24 | 2022-01-28 | 江苏东方四通科技股份有限公司 | Shielding shell and framework structure and transformer with shielding shell and framework structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104576006B (en) | 2016-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104576006A (en) | Current transformer being able to reduce local discharge and manufacturing method thereof | |
| CN204011021U (en) | Epoxy casting voltage mutual inductor | |
| CN203746591U (en) | High voltage basin type insulator with metal insert | |
| JP2016032094A (en) | Coil structure of open type stereoscopic wound-core dry-type transformer | |
| CN105336468A (en) | Inductor and manufacturing method of inductor | |
| WO2017025036A1 (en) | Insulation pipe and insulation sleeve with such insulation pipe | |
| CN107039159A (en) | Electric winding, the dry-type transformer with electric winding and the method for manufacturing electric winding | |
| CN104575947A (en) | Inductor and manufacturing method thereof | |
| CN102623153B (en) | A kind of current transformer insulating sleeve | |
| CN202796409U (en) | Dry type voltage transformer for switchgears | |
| CN204989400U (en) | A integral type high -voltage testing transformer for insulating oily withstanding voltage tester | |
| CN205122361U (en) | Electromagnetic type voltage transformer | |
| CN208873602U (en) | A kind of voltage transformer shielded with high-tension shielding and low pressure | |
| CN204155724U (en) | A kind of open dry-type transformer | |
| CN204011014U (en) | Fill chlamydate toroidal transformer | |
| CN110993285A (en) | Voltage transformer and manufacturing method thereof | |
| CN205159094U (en) | Vary voltage coiling mould | |
| CN203103106U (en) | Voltage transformer for GIS and C-GIS | |
| CN109346302B (en) | Voltage transformer with high-voltage shielding and low-voltage shielding | |
| CN103578725B (en) | Dry type voltage transformer for switchgear | |
| CN204731295U (en) | A kind of capacitance type potential transformer | |
| CN204407156U (en) | A kind of wire structures of three-dimensional wound core dry type transformer low-voltage lead | |
| CN204332660U (en) | Ring main unit combination voltage instrument transformer | |
| CN204731268U (en) | A kind of transformer core detection frock | |
| CN202587574U (en) | High voltage induction coil used for accelerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A current transformer capable of reducing partial discharge and its manufacturing method Effective date of registration: 20231206 Granted publication date: 20160928 Pledgee: China Merchants Bank Co.,Ltd. Dalian Branch Pledgor: DALIAN NO.2 INSTRUMENT TRANSFORMER GROUP CO.,LTD. Registration number: Y2023210000331 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |