CN101256893A - Current mutual inductor - Google Patents
Current mutual inductor Download PDFInfo
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- CN101256893A CN101256893A CNA2007103007445A CN200710300744A CN101256893A CN 101256893 A CN101256893 A CN 101256893A CN A2007103007445 A CNA2007103007445 A CN A2007103007445A CN 200710300744 A CN200710300744 A CN 200710300744A CN 101256893 A CN101256893 A CN 101256893A
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- winding
- current transformer
- high pressure
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- shielding box
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Abstract
The present invention relates to high pressure measurement field, especially relates to current transformer for ultra-high pressure electrical power system. The present invention includes iron-core (1) and secondary winding (2), screening box (3) and balancing windings (4), iron-core (1) deposited in screening box (3), winding secondary coil (2) outer of screening box, outer layer of secondary coil (2) has balancing windings (4). The present invention sets current transformer iron-core in screening box, outer layer of secondary coil is packed with lacquered wire, affect of measurement result caused by magnetic field produced by extra-high pressure great current and electric field is greatly reduced, ultra-high pressure current measurement error is also reduced effectively.
Description
Technical field
The present invention relates to the high-tension measurement field, relate in particular to ultrahigh voltage power system Current Transformer.
Technical background
At present, the manufacturing technology and the experience of maximal pressure current transformer mainly remain on 550kV both at home and abroad.Surpass the manufacturing technology and the experience of 550kV or more high-tension current transformer, also do not have relevant report in the world.Developing superhigh pressure market and breakthrough ehv power transmission technology are the research themes of electric power transfer, but magnetic field that the big electric current of extra-high pressure produces and electric field can't meet the demands with conventional error compensation to the error effect of current transformer at all.
Summary of the invention
The object of the present invention is to provide a kind of current transformer, can weaken magnetic field that the big electric current of extra-high pressure produces and electric field, satisfy the ehv power transmission specification requirement the influence of measurement result.
In order to solve above-mentioned technical barrier, technical scheme of the present invention is to realize like this, a kind of current transformer, comprise iron core and secondary winding, it is characterized in that also comprise shielding box and balance winding, iron core is placed in the shielding box, the outer coiling secondary winding of shielding box, the skin of secondary winding is surrounded with the balance winding.
Shielding box of the present invention can be made up of box body and lid, and described iron core is placed in the box body, and lid covers on box body.Shielding box can adopt stainless steel material to make.
Balance winding of the present invention is made up of four sections little windings that are evenly distributed on the secondary winding, each little winding coiling in the same way, and the top of each little winding is electrically connected mutually, and end is electrically connected mutually.
The present invention is arranged on the high-tension current inductor iron core in the shielding box, has shielded the influence of external electromagnetic field to iron core when the current transformer operate as normal, and carries out in annealing in process and the transportation at iron core, avoids being out of shape because of discontinuity; The present invention also is surrounded with the balance winding at the skin of secondary coil with enamelled wire, has shielded the influence of external electromagnetic field to secondary winding.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is done explanation in further detail.
Fig. 1 is a cutaway view of the present invention
Fig. 2 is a shielding box box body front view
Fig. 3 is a shielding box box body vertical view
Fig. 4 is a shielding box lid front view
Fig. 5 is a shielding box lid vertical view
Fig. 6 is balance winding connection and structural representation thereof
Embodiment
Referring to Fig. 1, the present invention includes the cross section is the ring-shaped core 1 of rectangle, is placed in the ring shielding box 3 that adapts with it unshakable in one's determination 1, is wound with secondary winding 2 on the ring shielding box 3, has held a layer equilibration winding 4 with enamelled wire on the secondary winding 2.As Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, ring shielding box 3 is made up of box body 5 and lid 6, put into ring-shaped core after, lid 6 covers on box body 5, reach the shielding ring-shaped core purpose.The ring shielding box can adopt stainless steel material to make.As shown in Figure 6, balance winding 4 is made up of four sections little windings that are evenly distributed on the secondary winding 2, each little winding coiling in the same way, little winding on the top of four sections little windings and the winding 2 is formed, each little winding coiling in the same way, the top of four sections little windings is electrically connected mutually with top, terminal and end is electrically connected mutually, make the balance winding not constitute closed loop like this, error to secondary coil does not exert an influence, simultaneously secondary coil is surrounded within the balance winding, shielded the influence of external electromagnetic field, the error that has ensured current transformer within the limits prescribed.
Adopted technical scheme of the present invention; significantly weakened the influence of magnetic field that the big electric current of extra-high pressure produces and electric field to measurement result; effectively reduce the ultra-high pressure current measure error; make this product rated primary current reach 4000A; rated voltage 800kV; class of accuracy reaches respectively: the measurement level reaches 0.2S (FS≤5) level, protected level reaches 5P20 and meets the GB1208-2003 GB, and the transient protection level reaches the TPY level, meets the GB16847-2003 world.
Claims (4)
1. current transformer, comprise iron core (1) and secondary winding (2), it is characterized in that: also comprise shielding box (3) and balance winding (4), (1) unshakable in one's determination is placed in the shielding box (3), the outer coiling secondary winding (2) of shielding box, the skin of secondary winding (2) is surrounded with balance winding (4).
2. current transformer as claimed in claim 1 is characterized in that: described shielding box (3) comprises box body (5) and lid (6), and described iron core is placed in the box body, and lid (6) covers on box body (5).
3. current transformer as claimed in claim 1 is characterized in that: described shielding box adopts stainless steel material to make.
4. current transformer as claimed in claim 1 is characterized in that: described balance winding (4) is by four sections little windings (7,8 that are evenly distributed on the secondary winding (2), 9,10) form each little winding coiling in the same way, the top of each little winding is electrically connected mutually, and end is electrically connected mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103007445A CN101256893A (en) | 2007-12-27 | 2007-12-27 | Current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103007445A CN101256893A (en) | 2007-12-27 | 2007-12-27 | Current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101256893A true CN101256893A (en) | 2008-09-03 |
Family
ID=39891588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103007445A Pending CN101256893A (en) | 2007-12-27 | 2007-12-27 | Current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101256893A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074344A (en) * | 2010-12-06 | 2011-05-25 | 保定天威集团有限公司 | Secondary winding group structure of current transformer |
| CN103559995A (en) * | 2013-10-22 | 2014-02-05 | 江苏靖江互感器厂有限公司 | Non-magnetic stainless steel protection device for current transformer |
-
2007
- 2007-12-27 CN CNA2007103007445A patent/CN101256893A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074344A (en) * | 2010-12-06 | 2011-05-25 | 保定天威集团有限公司 | Secondary winding group structure of current transformer |
| CN102074344B (en) * | 2010-12-06 | 2012-09-05 | 保定天威集团有限公司 | Secondary winding group structure of current transformer |
| CN103559995A (en) * | 2013-10-22 | 2014-02-05 | 江苏靖江互感器厂有限公司 | Non-magnetic stainless steel protection device for current transformer |
| CN103559995B (en) * | 2013-10-22 | 2016-06-08 | 江苏靖江互感器厂有限公司 | A kind of current transformer magnetism-free stainless steel protection unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20080905 Address after: Shaanxi province Xi'an City West High Tang Hing Road No. 7 Applicant after: Xi'an Xidian electric Limited by Share Ltd Address before: Shaanxi province Xi'an Fengdeng Road No. 29 Applicant before: Xi'an Electric Manufacturing Corp. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090109 Address after: Shaanxi province Xi'an City West High Tang Hing Road No. 7 post encoding: 710075 Applicant after: China XD Electronic Corporation Address before: No. 29 North Road, Shaanxi post encoding Fengdeng city in Xi'an Province: 710077 Applicant before: Xi'an Electric Manufacturing Corp. |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST CHINA ELECTRIC POWER CO. Free format text: FORMER OWNER: XI AN ELECTRIC MANUFACTURING CORP. Effective date: 20090109 |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080903 |