CN202258765U - Variable specific current transformer - Google Patents
Variable specific current transformer Download PDFInfo
- Publication number
- CN202258765U CN202258765U CN2011204083202U CN201120408320U CN202258765U CN 202258765 U CN202258765 U CN 202258765U CN 2011204083202 U CN2011204083202 U CN 2011204083202U CN 201120408320 U CN201120408320 U CN 201120408320U CN 202258765 U CN202258765 U CN 202258765U
- Authority
- CN
- China
- Prior art keywords
- secondary winding
- stage secondary
- level secondary
- winding
- current transformer
- 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 - Fee Related
Links
Images
Landscapes
- Transformers For Measuring Instruments (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model relates to a variable specific current transformer, belonging to the technical field of transformers. A technical scheme is characterized in that the variable specific current transformer comprises an expander (5), a transformer body (6), a porcelain bushing (7) and a base (8), wherein the expander is arranged above the transformer body, the porcelain bushing is arranged outside the transformer body and on the upper face of the base, the transformer body is internally provided with a primary winding (1), a protection-stage secondary winding (2), a metering-stage secondary winding (3) and a measurement-stage secondary winding (4), and the protection-stage secondary winding, the metering-stage secondary winding and the measurement-stage secondary winding are fixed outside the primary winding. The variable specific current transformer disclosed by the utility model has the beneficial effects of increasing the precision of the measurement-stage secondary winding and the metering-stage secondary winding so as to meet an accuracy requirement, simultaneously reducing the outer limit dimension of the protection-stage secondary winding to ensure the normal assembly of the protection-stage secondary winding, and meeting special user requirements on the basis of not increasing product cost.
Description
Technical field
The utility model relates to a kind of polytropic ratio current transformer, belongs to the instrument transformer technical field.
Background technology
At present, some user has proposed specific (special) requirements to current transformer, requires in same current transformer; Measure and measure a level secondary winding and adopt little current ratio, the protected level secondary winding adopts big current ratio simultaneously, and current ratio difference reaches more than 6 times; Even reach 20 times, because current ratio difference is excessive, background technology is not to measure and measure a level secondary winding error can not satisfy; Be exactly that the protected level secondary winding lead number of plies is too many, can not hold in the device body.
The utility model content
The purpose of the utility model provides a kind of polytropic ratio current transformer; Improved the precision of measuring and measuring the level secondary winding; Make it can satisfy accuracy requirement, reduced the outer limit size of protected level secondary winding simultaneously, it can normally be assembled; On the basis that does not increase product cost, satisfy user's specific (special) requirements, solved the problems referred to above that background technology exists.
The technical scheme of the utility model is: a kind of polytropic ratio current transformer; Comprise expander, device body, insulator, base; Expander is arranged on device side on one's body, and insulator is arranged on device body outside, and insulator is arranged on above the base; Winding, protected level secondary winding, a metering grade secondary winding are set in the device body and measure a level secondary winding, protected level secondary winding, metering level secondary winding and a measurement level secondary winding are fixed on the winding outside one time.
Winding conductor of the utility model is selected flat copper (aluminium) line for use; Improve a specified number of ampere turns, the measurement of little current ratio and metering level secondary winding are selected thicker lead for use, make the error of little current ratio secondary winding meet the demands easily; A corresponding raising of ampere-turn of the protected level secondary winding of big current ratio; Because actual current does not reach the rated primary current of big current ratio secondary winding, the lead of big current ratio secondary winding can be selected for use than thin wire through calculating, and reduces the lead number of plies; Reduce outer limit size, it can normally be assembled.
The good effect of the utility model: improved the precision of measuring and measuring the level secondary winding; Make it can satisfy accuracy requirement; Reduce the outer limit size of protected level secondary winding simultaneously, it can normally be assembled, on the basis that does not increase product cost, satisfied user's specific (special) requirements.
Description of drawings
Fig. 1 is the embodiment schematic appearance of the utility model;
Fig. 2 is the embodiment sketch map of the utility model;
Among the figure: winding 1, protected level secondary winding 2, metering level secondary winding 3 and measure a level secondary winding 4, expander 5, device body 6, insulator 7, base 8.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further specified through embodiment.
A kind of polytropic ratio current transformer comprises expander 5, device body 6, insulator 7, base 8, and expander is arranged on device side on one's body; Insulator is arranged on device body outside; Insulator is arranged on above the base, winding 1, protected level secondary winding 2, a metering level secondary winding 3 is set in the device body and measures 4, windings employings of level secondary winding flat copper (aluminium) wire-wound system; One time the number of turn is brought up to 12 circles; Protected level secondary winding, metering level secondary winding and measure a level secondary winding and be fixed on the winding outside one time are measured and the specified number of ampere turns of metering level secondary winding is 360 ampere-turns, lead adopt φ 1.8 and φ 1.0 the lead double joint and around; The specified number of ampere turns of protected level secondary winding is 7200 ampere-turns, with the lead winding of a φ 1.12.
Among the embodiment; Customer requirements 110kV current transformer protected level secondary winding rated transformation ratio is 2 * 600/5A; Class of accuracy is 10P30, and measuring level secondary winding rated transformation ratio is 2 * 30/5A, and class of accuracy is 0.5SFS5; Metering level secondary winding rated transformation ratio is 2 * 30/5A, and class of accuracy is 0.2SFS5.Winding conductor of the utility model is selected the paper bag flat type copper wire for use, and a number of turn of product is brought up to 12 circles, and the specified number of ampere turns of measuring level secondary winding and metering level secondary winding is 360 ampere-turns; Lead adopt φ 1.8 and φ 1.0 the lead double joint and around, so just than the requirement that is easier to satisfy class of accuracy, the while specified number of ampere turns of protected level secondary winding is 7200 ampere-turns; Because of the product actual current is no more than 60A; So the lead of protected level secondary winding can attenuate, just can satisfy the requirement of temperature rise and dynamic and thermal stability electric current with the lead of a φ 1.12, limit size also to reduce much outward; Can not influence the product assembling, satisfy user's specific (special) requirements.
Claims (1)
1. polytropic ratio current transformer; It is characterized in that comprising expander (5), device body (6), insulator (7), base (8); Expander is arranged on device side on one's body, and insulator is arranged on device body outside, and insulator is arranged on above the base; A winding (1), protected level secondary winding (2), metering grade secondary winding (3) are set in the device body and measure a level secondary winding (4), protected level secondary winding, metering level secondary winding and a measurement level secondary winding are fixed on the winding outside one time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204083202U CN202258765U (en) | 2011-10-25 | 2011-10-25 | Variable specific current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204083202U CN202258765U (en) | 2011-10-25 | 2011-10-25 | Variable specific current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202258765U true CN202258765U (en) | 2012-05-30 |
Family
ID=46119971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204083202U Expired - Fee Related CN202258765U (en) | 2011-10-25 | 2011-10-25 | Variable specific current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202258765U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811165B (en) * | 2012-11-07 | 2017-02-08 | 江苏思源赫兹互感器有限公司 | Outer-winding type current transformer |
| CN106653336A (en) * | 2015-10-29 | 2017-05-10 | 中国电力科学研究院 | Method of manufacturing current transformer with function of simplifying error test |
-
2011
- 2011-10-25 CN CN2011204083202U patent/CN202258765U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811165B (en) * | 2012-11-07 | 2017-02-08 | 江苏思源赫兹互感器有限公司 | Outer-winding type current transformer |
| CN106653336A (en) * | 2015-10-29 | 2017-05-10 | 中国电力科学研究院 | Method of manufacturing current transformer with function of simplifying error test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102360857B (en) | Integrated network distributing transformer with error compensating mutual inductor | |
| CN203191419U (en) | Intelligent electricity meter with diamagnetic structured electromagnetic current transformers | |
| CN102360891B (en) | Multi-transformation ratio current transformer | |
| CN202258765U (en) | Variable specific current transformer | |
| CN201629221U (en) | Zero sequence transformer of power leakage protection device | |
| CN202134397U (en) | Transformation ratio adjustable type current mutual inductor | |
| CN202189670U (en) | Combined current converter | |
| CN204117833U (en) | A kind of outdoor individual event metering current voltage combination transformer | |
| CN215896145U (en) | Novel voltage AC/DC Rogowski coil | |
| CN102800463B (en) | A kind of current transformer | |
| CN202614828U (en) | Three-phase zero sequence combined type current sensing device | |
| CN201570364U (en) | Electronic type current transformer | |
| CN204946702U (en) | A kind of Multichannel isolating voltage instrument transformer with compensation | |
| CN203069683U (en) | Online transformer transformation ratio testing device | |
| CN202084414U (en) | Combined-type zero sequence current mutual inductor | |
| CN202142406U (en) | Integrated network distribution transformer having error compensation mutual inductor | |
| CN204558236U (en) | A kind of three-phase integrated zero sequence current mutual inductor | |
| CN202678085U (en) | Adjustable transformation ratio type current transformer | |
| CN202513025U (en) | Extra-high-voltage current transformer with annular shielding box | |
| CN201130597Y (en) | Current transformer | |
| CN201877278U (en) | Secondary winding element structure for current transformers | |
| CN206516474U (en) | Current transformer | |
| CN204117827U (en) | A kind of outdoor high-capacity low office discharge stream instrument transformer | |
| CN104764918B (en) | Type three phase combined mutual-inductor based on orthogonal coordinate system conversion output | |
| CN202905446U (en) | High-precision and low-power voltage transformer used for electronic instrument and microcomputer protection |
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: 20120530 Termination date: 20141025 |
|
| EXPY | Termination of patent right or utility model |