CN201126445Y - High-voltage current transformer - Google Patents
High-voltage current transformer Download PDFInfo
- Publication number
- CN201126445Y CN201126445Y CNU2007201264534U CN200720126453U CN201126445Y CN 201126445 Y CN201126445 Y CN 201126445Y CN U2007201264534 U CNU2007201264534 U CN U2007201264534U CN 200720126453 U CN200720126453 U CN 200720126453U CN 201126445 Y CN201126445 Y CN 201126445Y
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- CN
- China
- Prior art keywords
- winding
- shielding box
- iron core
- voltage current
- secondary winding
- Prior art date
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Abstract
The utility model relates to a high-voltage measuring field, especially provides a high-voltage current mutual inductor comprising an iron core (1), a secondary winding (2), a shielding box (3) and a balance winding (4), wherein, the iron core (1) is arranged in the shielding box (3), a secondary coil (2) is winded on the shielding box, the balance winding (4) is wrapped on the outer side of the secondary coil (2) by enamel-covered wires. According to the utility model, the high-voltage current mutual inductor iron core is mounted in the shielding box, the balance winding is wrapped on the outer side of the secondary coil by enamel-covered wires, thereby reducing the effect of a magnetic field generated by big coils and a magnetic field between the big coils on the measuring result, and effectively reducing the measuring error of a super high voltage current.
Description
Technical field
The utility model relates to the high-tension measurement field, especially a kind of high-tension current inductor.
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 UHV (ultra-high voltage) 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 purpose of this utility model is to provide a kind of high-tension current inductor that can satisfy the ehv power transmission technical requirement.
In order to solve above-mentioned technical barrier, the technical solution of the utility model: comprise iron core and Secondary Winding, 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 utility model 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 utility model 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 utility model 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 utility model also is surrounded with the balance winding at the skin of secondary coil with enameled wire, has shielded the effect of external electromagnetic field to Secondary Winding.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
Fig. 1 is a cut-open view of the present utility model
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 utility model comprises that 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 enameled wire on the Secondary Winding 2.Shown in Fig. 2,3,4,5, 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 7,8,9,10 that are evenly distributed on the Secondary Winding 2, each little winding coiling in the same way, the top of four sections little windings is electrically connected mutually with top, and terminal and end is electrically connected mutually, makes 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 effect of external electromagnetic field, the error that has ensured current transformer within the limits prescribed.
Adopted the technical solution of the utility model; reduced the influence of magnetic field that big coil self produces and the magnetic field between the big coil to measurement result; effectively reduce the ultra-high pressure current measuring 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. high-tension current inductor, 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. high-tension current inductor 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. extra-high voltage current transformer as claimed in claim 1 is characterized in that: described shielding box (3) adopts stainless steel material to make.
4. extra-high voltage 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 |
|---|---|---|---|
| CNU2007201264534U CN201126445Y (en) | 2007-11-21 | 2007-11-21 | High-voltage current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201264534U CN201126445Y (en) | 2007-11-21 | 2007-11-21 | High-voltage current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201126445Y true CN201126445Y (en) | 2008-10-01 |
Family
ID=39999913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201264534U Expired - Lifetime CN201126445Y (en) | 2007-11-21 | 2007-11-21 | High-voltage current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201126445Y (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 |
| CN112712982A (en) * | 2020-12-09 | 2021-04-27 | 河南平高电气股份有限公司 | Current transformer |
-
2007
- 2007-11-21 CN CNU2007201264534U patent/CN201126445Y/en not_active Expired - Lifetime
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 |
| CN112712982A (en) * | 2020-12-09 | 2021-04-27 | 河南平高电气股份有限公司 | Current transformer |
| CN112712982B (en) * | 2020-12-09 | 2022-07-12 | 河南平高电气股份有限公司 | Current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20080905 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080905 Address after: Shaanxi province Xi'an City West High Tang Hing Road No. 7, zip code: 710075 Patentee after: China XD Electronic Corporation Address before: Shaanxi province Xi'an Fengdeng road 29, zip code: 710077 Patentee before: Xi'an Electric Manufacturing Corp. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081001 |