CN201689779U - Electronic current transformer - Google Patents
Electronic current transformer Download PDFInfo
- Publication number
- CN201689779U CN201689779U CN2010201765281U CN201020176528U CN201689779U CN 201689779 U CN201689779 U CN 201689779U CN 2010201765281 U CN2010201765281 U CN 2010201765281U CN 201020176528 U CN201020176528 U CN 201020176528U CN 201689779 U CN201689779 U CN 201689779U
- Authority
- CN
- China
- Prior art keywords
- winding
- level winding
- transformer
- current transformer
- mixed glue
- 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.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims abstract description 27
- 239000003292 glue Substances 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 239000004020 conductor Substances 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
An electronic transformer is composed of a primary high-pressure outlet terminal, a secondary measurement winding, a secondary protection winding, a primary conductor, an epotherm mixed glue and a transformer main body, be means of a method t hat a hollow frame made of the ephtherm mixed glue is arranged in the transformer main body, the secondary measurement winding and the secondary protection winding are arranged on the hollow frame respectively; one end of the primary conductor is connected with the secondary protection winding, the other end of the primary conductor is connected with the primary high-pressure outlet terminal, the transformer can be directly connected with an instrument and a relay protection device. The electronic transformer is capable of metering, controlling, measuring and protecting.
Description
Technical field: the utility model relates to a kind of novel large-current electric minor instrument transformer; refer more particularly in the digital intelligent comprehensive automation system of transformer substation; output is the small voltage signal; performance is overstable; can be directly and instrument, protective relaying device interface, thus realize that metering, control, measurement, defencive function are the electronic mutual inductor of one.
Background technology: along with the develop rapidly of electronic technology; microcomputer type relay protection and electronic electricity meter have progressively occupied leading position; in relaying protection and measuring, the energy stream and the separate from information flow of control section, thereby monitoring equipment no longer needs the instrument transformer of high power output.Simultaneously because the application of fast development, the integrated automation of transformation stations and the power distribution automation of power industry, therefore, it is extremely urgent to develop a kind of low energy consumption New type of current instrument transformer with measurement, protection and ability to communicate.
Summary of the invention: the purpose of this utility model just provide a kind of brand-new, compact conformation, can be at the direct matching used large-current electric minor instrument transformer of digital intelligent comprehensive automation system of transformer substation.The purpose of this utility model is to realize like this, electronic mutual inductor is measured level winding, second protection level winding, primary conductive body, epoxy resin mixed glue and current transformer body by high-voltage terminal end, a secondary and is formed, it is characterized in that: be provided with the made hollow skeleton of epoxy resin mixed glue in current transformer body, secondary is measured the level winding and second protection level winding is separately positioned on the hollow skeleton; One end of primary conductive body links to each other with second protection level winding, and the other end of primary conductive body links to each other with a high-voltage terminal end.The utility model installation dimension is consistent with electromagnetic current transducer with original mid-cabinet, installs and uses simple and conveniently, and operation need not safeguarded.In light weight, precision is high, good linearity, measuring range are wide, shortcoming such as the frequency band that has overcome traditional electromagnetic current transducer is narrow, low-response.Can not produce high voltage during the Current Transformer Secondary open circuit, fundamentally eliminate the significant trouble hidden danger in the power system operation, farthest ensure the safety of personnel and equipment.Safe, the not danger such as inflammable, explosive that produces because of trapped fuel.Cost is low, instant effect, in existing, the transformation and the raising of low voltage electrical equipment have realistic meaning.All signals transmit by the multiple twin shielding conductor, help strengthening the ability of anti-electromagnetic interference.Cost is low, and instant effect has realistic meaning to the transformation of existing transformer station electric equipment and the construction of raising and digital intelligent transformer station.All signals transmit by the multiple twin shielding conductor, help strengthening the ability of anti-electromagnetic interference.
Description of drawings: Fig. 1 is a structural representation of the present utility model
1, high-voltage terminal end 2, a secondary are measured level winding 3, second protection level winding
4, primary conductive body 5, epoxy resin mixed glue 6, current transformer body
Embodiment: the utility model is described in further detail below in conjunction with accompanying drawing
In the drawings, the utility model electronic mutual inductor is measured level winding, second protection level winding, primary conductive body, epoxy resin mixed glue and current transformer body by high-voltage terminal end, a secondary and is formed, it is characterized in that: be provided with the made hollow skeleton of epoxy resin mixed glue in current transformer body, secondary is measured the level winding and second protection level winding is separately positioned on the hollow skeleton; One end of primary conductive body links to each other with second protection level winding, and the other end of primary conductive body links to each other with a high-voltage terminal end.During concrete enforcement, coil in the utility model adopts the manganese-copper filament of exclusive design evenly to be wound on the hollow skeleton, adopt manganese-copper filament resistance string uniting and adjustment joint output voltage then, improved the stability of Rogowski coil greatly, instrument transformer is to become current transformer body with secondary winding with poured with epoxy resin by a winding.Coil be with lead equably on the non-ferromagnetic annular skeleton, one time bus places coil central authorities, so the current potential between winding coil and the bus is isolated.So owing to do not exist iron core not have saturated phenomenon.If bus current is I (t),
According to Faraday's electromagnetic induction law, the induced potential e (t) that Rogowski (Rogowski) coil two ends produce:
E (t)=-Mdi/dt M---coefficient of mutual inductance wherein
The induced potential e (t) that Rogowski coil two ends produce obtains and the proportional voltage signal of bus current after handling through integrator, pass through the processing, conversion of other link then after, can obtain and the proportional analog quantity output of primary current.
Secondary is measured the level winding and is adopted the little ironcore choke principle of low energy consumption to be made, and second protection level winding adopts little ironcore choke principle of low energy consumption or Rogowski (Rogowski) coil principle to be made.
Adopt the electronic current transducer that above structure produces can be directly and instrument, protective relaying device interface, directly supporting with intermediate switchgear cabinet.Thereby realize the function of metering, control, measurement, protection.
Claims (1)
1. electronic current mutual inductor, measuring level winding, second protection level winding, primary conductive body, epoxy resin mixed glue and current transformer body by high-voltage terminal end, a secondary is formed, it is characterized in that: be provided with the made hollow skeleton of epoxy resin mixed glue in current transformer body, secondary is measured the level winding and second protection level winding is separately positioned on the hollow skeleton; One end of primary conductive body links to each other with second protection level winding, and the other end of primary conductive body links to each other with a high-voltage terminal end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201765281U CN201689779U (en) | 2010-04-19 | 2010-04-19 | Electronic current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201765281U CN201689779U (en) | 2010-04-19 | 2010-04-19 | Electronic current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689779U true CN201689779U (en) | 2010-12-29 |
Family
ID=43378057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201765281U Expired - Lifetime CN201689779U (en) | 2010-04-19 | 2010-04-19 | Electronic current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201689779U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819869A (en) * | 2010-04-19 | 2010-09-01 | 熊江咏 | Electronic current transformer |
-
2010
- 2010-04-19 CN CN2010201765281U patent/CN201689779U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819869A (en) * | 2010-04-19 | 2010-09-01 | 熊江咏 | Electronic current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160816 Address after: 214500 No. 23, Ping Road, west of Jiangsu, Jingjiang, Zhenjiang Patentee after: Jingjiang Jiangsu mutual inductor Limited by Share Ltd Address before: 214516 No. 23, Ping Road, west of Jiangsu, Jingjiang, Zhenjiang Patentee before: Xiong Jiangyong |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |