CN202084424U - Electronic type low-voltage combined transformer - Google Patents
Electronic type low-voltage combined transformer Download PDFInfo
- Publication number
- CN202084424U CN202084424U CN2011201422892U CN201120142289U CN202084424U CN 202084424 U CN202084424 U CN 202084424U CN 2011201422892 U CN2011201422892 U CN 2011201422892U CN 201120142289 U CN201120142289 U CN 201120142289U CN 202084424 U CN202084424 U CN 202084424U
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- transformer
- voltage
- winding
- type low
- electronic type
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Abstract
The utility model provides an electronic type low-voltage combined transformer which consists of a current winding and a voltage winding, wherein the current winding and the voltage winding are adhered to form a whole by using a mixed polyurethane potting adhesive, a transformer main body is cast by epoxy resin, a secondary outlet wire of the transformer is led out by an aviation terminal, a primary outlet terminal is arranged at the upper end of the transformer, and a grounded end is arranged at the lower part of the transformer. The electronic type low-voltage combined transformer can be used for outputting a small-voltage signal, and can be directly connected with an instrument and a relay protecting device so as to realize metering, controlling, measuring and protecting functions.
Description
Affiliated technical field
The utility model relates to intelligent substation sampling field; especially a kind of electronic low pressure combination transformer; it is applicable to low pressure digital transformer substation complex automatic system; it is output as the small voltage signal; can be directly and instrument, protective relaying device interface, thus realize metering, control, measure, the function of protection.
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, and 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 therefore the application of fast development, the integrated automation of transformation stations and the power distribution automation of power industry, develops a kind of have the low energy consumption new-style electronic low-tension current of measurement, defencive function, the first-selected problem that the voltage combination transformer is manufacturer.
Summary of the invention
The purpose of this utility model is exactly for the transformation and raising digital intellectualization transformer station that solves transformer station's electric equipment, and a kind of low energy consumption new-style electronic low-tension current, voltage combination transformer with measurement, defencive function is provided.The utility model is achieved in that the electronic low pressure combination transformer is made up of electric current winding and voltage winding two parts, voltage winding and electric current winding are in aggregates with polyurethane embedding epoxy glue bonding, become current transformer body with poured with epoxy resin again, the secondary outlet of instrument transformer is drawn with the aviation terminal, an outlet terminal is at the position, upper end of instrument transformer, and earth terminal is in the bottom of instrument transformer.The electric current winding partly adopts Rogowski coil design principle, the Rogowski coil adopts manganese-copper filament evenly to be wound on the hollow skeleton, then with manganese-copper filament resistance string uniting and adjustment joint output voltage, allow output voltage signal meet IEC60044-8:2002 and GB/T20840.8-2007 " electronic current mutual inductor " standard, improved the stability of Rogowski coil greatly; The voltage winding partly adopts the design principle of series inductance voltage divider.Adopt the electronic low pressure electric current, voltage combination transformer of above principle can be directly and instrument, protective relaying device interface, directly supporting with the digital transformer substation complex automatic system, thus realize metering, control, measure, the function of protection.
The utility model has the advantages that: install and use simple and conveniently, operation need not safeguard, and is in light weight, volume is little, precision is high, good linearity, measuring range are wide, shortcomings 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.All signals transmit by the multiple twin shielding conductor, help strengthening the ability of anti-electromagnetic interference.Meet the intelligent substation requirement, guaranteed the precision and the reliability of sampled data, the transformation of existing transformer station electric equipment and the construction of raising and digital intelligent transformer station are had realistic meaning.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is Rogowski (Rogowski) coil schematic diagram
.1 among Fig. 1, outlet terminal 2, aviation terminal 3, voltage winding 4, polyurethane embedding epoxy glue
5, electric current winding 6, epoxy resin mixed glue 7, earth terminal
.1 among Fig. 2, non-ferromagnetic annular skeleton 2, bus 3, secondary transducer
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing
In Fig. 1: the electronic low pressure combination transformer is in aggregates with voltage winding 3 usefulness polyurethane embedding epoxy glues 4 bondings by electric current winding 5, pours into current transformer body with epoxy resin mixed glue 6 again.The secondary outlet of instrument transformer is drawn with aviation terminal 2, and an outlet terminal 1 is at the position, upper end of instrument transformer, and earth terminal 7 is in the bottom of instrument transformer.
During concrete enforcement, electronic low pressure combination transformer electric current winding partly adopts Rogowski (Rogowski) the coil principle in the accompanying drawing 2 to be made, with lead equably on non-ferromagnetic annular skeleton 1, one time bus 2 places coil central authorities, and 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=-Mdi/dt, wherein M is a coefficient of mutual inductance, obtain and the proportional voltage signal of bus current after the induced potential e (t) that produces when Rogowski coil two ends handles through integrator, pass through 3 conversion of secondary transducer then after, can obtain and the proportional analog quantity output of primary current.
Electronic low pressure combination transformer voltage segment has adopted the design principle of series inductance voltage divider, and the little reactance of output voltage signal from be connected on circuit taken out, and as required, signal can take out at high-pressure side, also can get at the earth terminal of voltage divider.
Adopt electronic low pressure electric current, the voltage combination transformer of above principle; meet IEC60044-8:2002 and GB/T20840.8-2007 " electronic current mutual inductor " standard and IEC60044-7:1999 and GB/T20840.7-2007 " electronic type voltage transformer " standard; can be directly and instrument, protective relaying device interface, directly supporting with the digital transformer substation complex automatic system.Thereby realize the function of metering, control, measurement, protection.
Claims (1)
1. an electronic low pressure combination transformer is that electric current winding and voltage winding are dimerous, it is characterized in that: the electric current winding (5) of instrument transformer and voltage winding (3) are bonding in aggregates with two parts with polyurethane embedding epoxy glue (4), use epoxy resin mixed glue (6) to pour into current transformer body then, the secondary outlet of instrument transformer is drawn with aviation terminal (2), an outlet terminal (1) is at the position, upper end of instrument transformer, and earth terminal (7) is in the bottom of instrument transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201422892U CN202084424U (en) | 2011-05-08 | 2011-05-08 | Electronic type low-voltage combined transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201422892U CN202084424U (en) | 2011-05-08 | 2011-05-08 | Electronic type low-voltage combined transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202084424U true CN202084424U (en) | 2011-12-21 |
Family
ID=45345046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201422892U Expired - Fee Related CN202084424U (en) | 2011-05-08 | 2011-05-08 | Electronic type low-voltage combined transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202084424U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177863A (en) * | 2013-04-18 | 2013-06-26 | 南京智达电气有限公司 | Current transformer with thermoplastic rubber and preparation method thereof |
| CN103543312A (en) * | 2013-10-22 | 2014-01-29 | 江苏靖江互感器厂有限公司 | Passive Rogowski coil electronic current transformer applied to GIS |
| CN105024371A (en) * | 2015-07-22 | 2015-11-04 | 江苏靖江互感器厂有限公司 | Four-in-one intelligent sampling discharging device |
-
2011
- 2011-05-08 CN CN2011201422892U patent/CN202084424U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177863A (en) * | 2013-04-18 | 2013-06-26 | 南京智达电气有限公司 | Current transformer with thermoplastic rubber and preparation method thereof |
| CN103543312A (en) * | 2013-10-22 | 2014-01-29 | 江苏靖江互感器厂有限公司 | Passive Rogowski coil electronic current transformer applied to GIS |
| CN103543312B (en) * | 2013-10-22 | 2016-09-14 | 江苏靖江互感器厂有限公司 | A kind of passive Rogowski coil electronic current mutual inductor for GIS |
| CN105024371A (en) * | 2015-07-22 | 2015-11-04 | 江苏靖江互感器厂有限公司 | Four-in-one intelligent sampling discharging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20190508 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |