CN202816644U - Zero sequence current transformer - Google Patents
Zero sequence current transformer Download PDFInfo
- Publication number
- CN202816644U CN202816644U CN 201220516958 CN201220516958U CN202816644U CN 202816644 U CN202816644 U CN 202816644U CN 201220516958 CN201220516958 CN 201220516958 CN 201220516958 U CN201220516958 U CN 201220516958U CN 202816644 U CN202816644 U CN 202816644U
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- CN
- China
- Prior art keywords
- mutual inductor
- current transformer
- current mutual
- outer cover
- annular outer
- 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.)
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Abstract
The utility model discloses a zero sequence current transformer which comprises an annular casing, a current transformer coil and an installation base. The annular casing comprises an annular casing base and an annular casing upper cover clamped with the annular casing base, wherein a current transformer coil groove is arranged on the annular casing base, and the outer wall of an inner ring of the annular casing base extends backwards to form a ferromagnetic conduit. The current transformer coil comprises an annular iron core and a coil wound on the annular iron core, wherein current transformer coil is coaxially arranged in the current transformer coil groove, and the annular casing is fixedly arranged on the installation base. The zero sequence current transformer has the advantages of being simple in structure, good in balance, strong in safety and long in service life.
Description
Technical field
The utility model relates to a kind of current transformer, specifically, has related to a kind of zero sequence current mutual inductor.
Background technology
In the distribution transformer low-voltage circuit that use in the vast rural area of China, generally apply RCD, and zero sequence current mutual inductor is the crucial detection part in the RCD.But there are various defectives in existing zero sequence current mutual inductor, can not satisfy well actual application.For example: the zero sequence current mutual inductor that adopts high permeability magnetic material to make, cost is higher, although sensitivity and equilibrium response are better, but magnetic coercive force is relatively poor, when large electric current metallic short circuit ground connection occurring in the low voltage three-phase four-wire circuit, will certainly in the zero sequence current mutual inductor loop, consist of large circuit closed loop, cause easily the iron core magnetic saturation in the zero sequence current mutual inductor, cause the RCD tripping; The zero sequence current mutual inductor that adopts ordinary silicon steel disc magnetic material to make; cost is low; but sensitivity and equilibrium response are relatively poor; when significant unsymmetrical current occurring in the low voltage three-phase four-wire circuit; can be poor because of the equilibrium response of zero sequence current mutual inductor, cause the frequent misoperation of RCD.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, thus provide a kind of simple in structure, equilibrium response good, the zero sequence current mutual inductor of high safety and long service life.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of zero sequence current mutual inductor, it comprises annular outer cover, current mutual inductor coil and mounting seat, described annular outer cover comprises annular outer cover base and the annular outer cover loam cake that engages with described annular outer cover base, is provided with the current mutual inductor coil groove on the described annular outer cover base; Described current mutual inductor coil comprises annular core and the coil that is wound on the described annular core, and described current mutual inductor coil is coaxial to be arranged in the described current mutual inductor coil groove, and described annular outer cover is fixedly installed on the described mounting seat.
Based on above-mentioned, the endocyclic outer wall of described annular outer cover base extends back and is set to ferromagnetic conduit.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, the utlity model has simple in structure, equilibrium response good, the advantage of high safety and long service life.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is side-looking structural representation of the present utility model.
Fig. 3 is the structural representation of current mutual inductor coil.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
Such as Fig. 1, Fig. 2 and shown in Figure 3, a kind of zero sequence current mutual inductor, it comprises annular outer cover 1, current mutual inductor coil 2 and mounting seat 3, described annular outer cover 1 comprises annular outer cover base and the annular outer cover loam cake 12 that engages with described annular outer cover base, be provided with current mutual inductor coil groove 111 on the described annular outer cover base, the endocyclic outer wall of described annular outer cover base extends back and forms ferromagnetic conduit 112, in order to shield the interference in external magnetic field; Described current mutual inductor coil 2 comprises annular core 21 and the coil 22 that is wound on the described annular core, described coil 22 adopts circle copper enamelled wire Double-wire parallel wounds on described annular core 21, and forms the secondary output winding L 1 of this zero sequence current mutual inductor and be used for the secondary test winding L 2 of quality inspection; Described current mutual inductor coil 2 coaxial being arranged in the described current mutual inductor coil groove 111, described annular outer cover 1 is fixedly installed on the described mounting seat 3.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (2)
1. zero sequence current mutual inductor, it is characterized in that: it comprises annular outer cover, current mutual inductor coil and mounting seat, described annular outer cover comprises annular outer cover base and the annular outer cover loam cake that engages with described annular outer cover base, is provided with the current mutual inductor coil groove on the described annular outer cover base; Described current mutual inductor coil comprises annular core and the coil that is wound on the described annular core, and described current mutual inductor coil is coaxial to be arranged in the described current mutual inductor coil groove, and described annular outer cover is fixedly installed on the described mounting seat.
2. zero sequence current mutual inductor according to claim 1, it is characterized in that: the endocyclic outer wall of described annular outer cover base extends back and is set to ferromagnetic conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220516958 CN202816644U (en) | 2012-10-10 | 2012-10-10 | Zero sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220516958 CN202816644U (en) | 2012-10-10 | 2012-10-10 | Zero sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202816644U true CN202816644U (en) | 2013-03-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220516958 Expired - Fee Related CN202816644U (en) | 2012-10-10 | 2012-10-10 | Zero sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202816644U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867617A (en) * | 2012-10-10 | 2013-01-09 | 河南开启电力实业有限公司 | Zero sequence current transformer and manufacturing method thereof |
| CN105895344A (en) * | 2014-11-11 | 2016-08-24 | 杭州彼爱琪电器有限公司 | Unsaturated current transformer and fabrication method thereof |
-
2012
- 2012-10-10 CN CN 201220516958 patent/CN202816644U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867617A (en) * | 2012-10-10 | 2013-01-09 | 河南开启电力实业有限公司 | Zero sequence current transformer and manufacturing method thereof |
| CN102867617B (en) * | 2012-10-10 | 2015-12-09 | 河南开启电力实业有限公司 | Zero sequence current mutual inductor and preparation method thereof |
| CN105895344A (en) * | 2014-11-11 | 2016-08-24 | 杭州彼爱琪电器有限公司 | Unsaturated current transformer and fabrication method thereof |
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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: 20130320 Termination date: 20151010 |
|
| EXPY | Termination of patent right or utility model |