CN204204616U - A kind of current transformer with major-minor iron core - Google Patents
A kind of current transformer with major-minor iron core Download PDFInfo
- Publication number
- CN204204616U CN204204616U CN201420074178.6U CN201420074178U CN204204616U CN 204204616 U CN204204616 U CN 204204616U CN 201420074178 U CN201420074178 U CN 201420074178U CN 204204616 U CN204204616 U CN 204204616U
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- iron core
- current transformer
- core
- major
- minor
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Abstract
The utility model discloses a kind of current transformer with major-minor iron core, primarily of main core, secondary iron core, a winding and secondary winding composition.Described secondary winding has the number of turn of 80% to be evenly wound on individually on main core, and the number of turn of remaining 20% is evenly wound on main core and pair iron core.Described main core is made up of protective case and ultracrystallite iron core, and described secondary iron core is rolled by high magnetic sensitive type silicon steel sheet, then forms with polyester film wrapping.The utility model expands ultracrystallite iron core compared with range of linearity during low magnetic flux density, makes the error of current transformer when the rated current of 20% obtain suitable compensation, improves the linearity of current transformer output area, meet the error requirements of 0.2S level.
Description
Technical field
The utility model relates to a kind of current transformer, especially relates to a kind of current transformer with major-minor iron core, belongs to high voltage electrical apparatus technical field, is measuring a kind of current transformer in electric power system.
Background technology
At present, in high pressure, extra-high voltage electric power system, Verification of Measuring Current Transformer is because voltage is high, insulation distance is large, cause that current mutual inductor coil diameter is large, magnetic circuit is long, particularly the current transformer of external in high pressure, ultra high voltage, its winding is all the structure of punching 1 circle.For the current transformer of the more small but excellent degree of this primary current high (as 0.2S level) again, error limit when passing into the rated current of 20% does not often reach standard-required, require very high to the iron core of current transformer, high initial magnetic permeability and the extremely wide range of linearity must be had, generally select now expensive glass not alloy core could meet.
Summary of the invention
Problem to be solved in the utility model is: for prior art Problems existing, provides a kind of current transformer with major-minor iron core, solve existing Verification of Measuring Current Transformer cost high, be difficult to meet high-precision problem.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of current transformer with major-minor iron core, primarily of main core, secondary iron core, a winding and secondary winding composition, described secondary winding has the number of turn of 80% to be evenly wound on individually on main core, and the number of turn of remaining 20% is evenly wound on main core and pair iron core.
Described main core is made up of protective case and ultracrystallite iron core.
Described secondary iron core is rolled by high magnetic sensitive type silicon steel sheet, then form with polyester film wrapping.
The secondary winding of described a kind of current transformer with major-minor iron core only has the number of turn of 20% to be wound on secondary iron core, secondaryly unshakable in one's determination when being energized to reach capacity sooner state than main core, and the pair of the state that reaches capacity is unshakable in one's determination will the output current of stable secondary winding.When passing into rated current and reaching 20%, secondary iron core does not reach capacity state, has larger compensation effect to the output of secondary winding; When passing into electric current and being greater than 20%, secondary iron core can comparatively fast reach capacity state, enters the pair of the saturation condition compensation effect exported secondary winding unshakable in one's determination very little.Such structure expands ultracrystallite iron core compared with range of linearity during low magnetic flux density, makes the error of current transformer when the rated current of 20% obtain adequate compensation, improves the linearity of current transformer output area, meet the error requirements of 0.2S level.
The beneficial effects of the utility model are: a kind of current transformer with major-minor iron core, when using the ultracrystallite iron core of low cost, improves accuracy class, have that structure is simple, reasonable in design, the advantage of stable performance.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of current transformer with major-minor iron core of the utility model;
Fig. 2 is the structural representation of a kind of secondary winding in current transformer with major-minor iron core of the utility model.
In figure: 1-winding; 2-secondary winding; 3-is secondary unshakable in one's determination; 4-main core.
Below in conjunction with accompanying drawing, the utility model is further described:
Embodiment
As shown in Figures 1 and 2, a kind of current transformer with major-minor iron core of the utility model forms primarily of main core 4, secondary 3, winding 1 unshakable in one's determination and secondary winding 2, described secondary winding 2 has the number of turn of 80% to be evenly wound on individually on main core 4, and the number of turn of remaining 20% is evenly wound on main core 4 and pair iron core 3.
Described main core 4 is made up of protective case and ultracrystallite iron core.
Described secondary unshakable in one's determination 3 is rolled by high magnetic sensitive type silicon steel sheet, then forms with polyester film wrapping.
The secondary winding 2 of described a kind of current transformer with major-minor iron core only has the number of turn of 20% to be wound on secondary unshakable in one's determination 3, when being energized, secondary unshakable in one's determination 3 to reach capacity state sooner than main core 4, and the pair iron core 3 of the state that reaches capacity will the output current of stable secondary winding 2.When passing into rated current and reaching 20%, secondary unshakable in one's determination 3 do not reach capacity state, have larger compensation effect to the output of secondary winding 2; When passing into electric current and being greater than 20%, secondary unshakable in one's determination 3 can comparatively fast reach capacity state, and the compensation effect that the pair 3 pairs of secondary winding 2 unshakable in one's determination entering saturation condition export is very little.Such structure expands ultracrystallite iron core compared with range of linearity during low magnetic flux density, makes the error of current transformer when the rated current of 20% obtain adequate compensation, improves the linearity of current transformer output area, meet the error requirements of 0.2S level.
Claims (3)
1. the current transformer with major-minor iron core, primarily of main core, secondary iron core, a winding and secondary winding composition, it is characterized in that: described secondary winding has the number of turn of 80% to be evenly wound on individually on main core, the number of turn of remaining 20% is evenly wound on main core and pair iron core.
2. a kind of current transformer with major-minor iron core according to claim 1, is characterized in that: described main core is made up of protective case and ultracrystallite iron core.
3. a kind of current transformer with major-minor iron core according to claim 1, is characterized in that: described secondary iron core is rolled by high magnetic sensitive type silicon steel sheet, then forms with polyester film wrapping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074178.6U CN204204616U (en) | 2014-02-18 | 2014-02-18 | A kind of current transformer with major-minor iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074178.6U CN204204616U (en) | 2014-02-18 | 2014-02-18 | A kind of current transformer with major-minor iron core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204204616U true CN204204616U (en) | 2015-03-11 |
Family
ID=52662547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420074178.6U Expired - Fee Related CN204204616U (en) | 2014-02-18 | 2014-02-18 | A kind of current transformer with major-minor iron core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204204616U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378179A (en) * | 2018-11-20 | 2019-02-22 | 浙江天际互感器有限公司 | The anti-DC current transformer iron core of electromagnetic type and the anti-DC current transformer of electromagnetic type |
-
2014
- 2014-02-18 CN CN201420074178.6U patent/CN204204616U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378179A (en) * | 2018-11-20 | 2019-02-22 | 浙江天际互感器有限公司 | The anti-DC current transformer iron core of electromagnetic type and the anti-DC current transformer of electromagnetic type |
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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: 20150311 Termination date: 20190218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |