CN2775813Y - Precision split core type current transformer - Google Patents
Precision split core type current transformer Download PDFInfo
- Publication number
- CN2775813Y CN2775813Y CN 200420104790 CN200420104790U CN2775813Y CN 2775813 Y CN2775813 Y CN 2775813Y CN 200420104790 CN200420104790 CN 200420104790 CN 200420104790 U CN200420104790 U CN 200420104790U CN 2775813 Y CN2775813 Y CN 2775813Y
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- CN
- China
- Prior art keywords
- iron core
- current transformer
- coil
- utility
- open loop
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- Expired - Fee Related
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Abstract
The utility model relates to a precise pincer type current transformer which belongs to the technical field of online testing of an electric energy field verifying unit in an electric system. The utility model mainly solves the problem that the existing pincer type current transformer is not provided with an intense magnetic field shielding device, therefore the existing pincer type current transformer is surely interfered by intense magnetic fields; therefore, the measuring accuracy (can only reach 0.2 level) of the existing pincer type current transformer is low and can not meet measuring requirements, and the existing pincer type current transformer has a single transformation ratio range. The utility model is characterized in that the utility model comprises a fixing handle, a movable handle, an open loop iron core, a coil, an insulating sleeve and a shielding cover, wherein the open loop iron core is connected with the fixing handle and the movable handle; the coil is wound on the open loop iron core; the insulating sleeve coats the open loop iron core and the coil; besides, the shielding cover is arranged between the insulating sleeve and the coil and coats the open loop iron core and the coil. The utility model has the characteristics that the utility model has high precision (0.05 level), can select corresponding ranges according to load conditions and can be used for online high-voltage circuit testing. The utility model is mainly used for the cooperation of the testing of an electric meter field verifying instrument in electric energy metering detection of the electric system.
Description
Technical field
The utility model relates to a kind of clamp current transformer, particularly a kind of clamp current transformer with degree of precision and measuring range adjustable.Belong to electric power system electric energy metrical on-site calibration device on-line testing technical field.
Background technology
Electric power system must use clamp current transformer to cooperate the electric energy meter on-site calibrator test in electric energy metrical detects.Existing clamp current transformer, will inevitably be subjected to the interference of high-intensity magnetic field, and make its certainty of measurement (can only reach 0.2 grade) lower in cooperating the electric energy meter on-site calibrator test owing to be not provided with the high-intensity magnetic field screening arrangement, can not satisfy measurement requirement.Simultaneously, because of the clamp current transformer precision is low, three-phase can not exchange, and has brought inconvenience for on-the-spot real work.In addition, existing clamp current transformer has only single no-load voltage ratios such as 400A, 500A, 1000A, and actual load is changeable, in use must frequently select, change corresponding clamp current transformer according to changeable load condition, and work on the spot is very inconvenient.
Summary of the invention
The purpose of this utility model is exactly the accurate clamp current transformer that a kind of precision height, convertible range are provided at above-mentioned weak point.
Technical solution of the present utility model is: a kind of accurate clamp current transformer, comprise fixed handle, flexible handle and the open loop iron core that links with fixed handle, flexible handle, coil on the open loop iron core, the insulating case of parcel open loop iron core and coil is characterized in that: the radome that is provided with parcel open loop iron core and coil between insulating case and coil.
Can be provided with centre tap on the said coil in the technical solution of the utility model, and this centre tap and termination are connected on the gear switch switch that is located at the outside.
Said centre tap can have four in the technical solution of the utility model
The two-port of said open loop iron core is respectively equipped with iron core projection and the iron core groove that matches in the technical solution of the utility model.
The utility model is owing to be provided with the magnetic field shielding cover of parcel outside the open loop iron core of clamp current transformer and coil, thereby, in cooperating the electric energy meter on-site calibrator test, can avoid or reduce high-intensity magnetic field in the electric power system site environment greatly, make its precision improve (0.05 grade) greatly the interference of clamp current transformer.Simultaneously, because the raising of precision can be exchanged three-phase, brought convenience for on-the-spot real work.The utility model is owing to be provided with centre tap in the coil of clamp current transformer, and it is connected with the gear switch switch, thereby, in use can select the driving switch of corresponding range according to changeable load condition, make clamp current transformer have the characteristics of a pincers polytropic ratio gear, make work on the spot very convenient.The utility model is owing to the iron core projection and the iron core groove that are provided with cooperation in two port correspondences of open loop iron core, thereby better effects if when making it closed simultaneously, also can be used for online high-tension line test.The utility model is mainly used in the cooperation of electric energy meter on-site calibrator test in the detection of electric power system electric energy metrical.
Description of drawings
Fig. 1 is a structural representation of the present utility model; Fig. 2 is the local A cutaway view of Fig. 1; Fig. 3 is the conspectus of coil.
Embodiment
As shown in Figure 1 to Figure 3.Corresponding identical in fixed handle 4, flexible handle 7, open loop iron core 11, insulating case 8 and secondary current lead-out wire 3 and the existing clamp current transformer.The two ends of coil 10 are S
1, S
6End, S has been set up in the centre
2, S
3, S
4, S
5Tap terminals.Gear switch switch 5 is located at clamp current transformer 1 outside.The S of coil 10
1, S
2, S
3, S
4, S
5, S
6End connects with the respective notch of gear switch switch 5 respectively.By the gear switch of gear switch switch 5, can realize the polytropic ratio range conversion of clamp current transformer 1, promptly realize 100/0.5,200/0.5,300/0.5,400/0.5,500/0.5 transforming gear.Primary winding L
1L
2Be coil to be measured.Radome 9 is positioned at insulating case 8 inboards, with open loop iron core 11 and coil 10 parcels.Radome 9 adopts the material of maskable electromagnetic field to make, as the tin alloy platinum material.After adopting radome 9, can make clamp current transformer 1 in use avoid of the interference of on-the-spot strong magnetic field circumstance to the secondary current of generation in the coil 10, the precision of clamp current transformer 1 is improved greatly, and through the actual test of clamp current transformer that we make, precision can reach 0.05 grade.Two openends of opening bad iron core 11 are respectively equipped with iron core projection 2 and iron core groove 6, and this iron core projection 2 matches with iron core groove 6 shapes, thereby when closing up, can make iron core 11 closed contacts better.And, adopt the clamp current transformer 1 of iron core projection 2 and iron core groove 6 also to can be used for the online detection of high pressure, widened the range of application of clamp current transformer.
Claims (4)
1, a kind of accurate clamp current transformer, comprise fixed handle (4), flexible handle (7) and the open loop iron core (11) that links with fixed handle (4), flexible handle (7), coil (10) on the open loop iron core (11), the insulating case (8) of parcel open loop iron core (11) and coil (10) is characterized in that: the radome (9) that is provided with parcel open loop iron core (11) and coil (10) between insulating case (8) and coil (10).
2, a kind of accurate clamp current transformer according to claim 1 is characterized in that: be provided with centre tap (S on described coil (10)
2, S
3, S
4, S
5), and with this centre tap (S
2, S
3, S
4, S
5) and termination (S
6) be connected on the gear switch switch (5) that is located at the outside.
3, a kind of accurate clamp current transformer according to claim 2 is characterized in that: described centre tap (S
2, S
3, S
4, S
5) there are four.
4, according to claim 1,2 or 3 described a kind of accurate clamp current transformers, it is characterized in that: the two-port of described open loop iron core (11) is respectively equipped with iron core projection (2) and the iron core groove (6) that matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420104790 CN2775813Y (en) | 2004-12-31 | 2004-12-31 | Precision split core type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420104790 CN2775813Y (en) | 2004-12-31 | 2004-12-31 | Precision split core type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2775813Y true CN2775813Y (en) | 2006-04-26 |
Family
ID=36750130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420104790 Expired - Fee Related CN2775813Y (en) | 2004-12-31 | 2004-12-31 | Precision split core type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2775813Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8115475B2 (en) | 2009-09-23 | 2012-02-14 | Electrical Reliability Services, Inc. | Manipulation assembly for online electrical system test probe installation |
| CN103197216A (en) * | 2013-04-12 | 2013-07-10 | 华北电力大学（保定） | Cable joint partial discharge monitoring system based on optical fiber transmission |
| WO2014178756A1 (en) | 2013-04-29 | 2014-11-06 | Samokish Vyacheslav Vasilievich | Transformer for measuring current without interrupting the circuit (variants) |
| CN106841743A (en) * | 2016-11-28 | 2017-06-13 | 国网河南省电力公司中牟县供电公司 | Transformer secondary side detects control method and device |
| CN108352249A (en) * | 2015-11-05 | 2018-07-31 | 赫兹曼电力公司 | Current sensor |
| CN113341363A (en) * | 2021-05-10 | 2021-09-03 | 国网浙江省电力有限公司金华供电公司 | Mutual inductor turn number conversion device |
-
2004
- 2004-12-31 CN CN 200420104790 patent/CN2775813Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8115475B2 (en) | 2009-09-23 | 2012-02-14 | Electrical Reliability Services, Inc. | Manipulation assembly for online electrical system test probe installation |
| US8736252B2 (en) | 2009-09-23 | 2014-05-27 | Electrical Reliability Services, Inc. | Manipulation assembly for online electrical system test probe installation |
| CN103197216A (en) * | 2013-04-12 | 2013-07-10 | 华北电力大学（保定） | Cable joint partial discharge monitoring system based on optical fiber transmission |
| WO2014178756A1 (en) | 2013-04-29 | 2014-11-06 | Samokish Vyacheslav Vasilievich | Transformer for measuring current without interrupting the circuit (variants) |
| CN108352249A (en) * | 2015-11-05 | 2018-07-31 | 赫兹曼电力公司 | Current sensor |
| CN106841743A (en) * | 2016-11-28 | 2017-06-13 | 国网河南省电力公司中牟县供电公司 | Transformer secondary side detects control method and device |
| CN106841743B (en) * | 2016-11-28 | 2023-07-07 | 国网河南省电力公司中牟县供电公司 | Method and device for detecting and controlling secondary side of transformer |
| CN113341363A (en) * | 2021-05-10 | 2021-09-03 | 国网浙江省电力有限公司金华供电公司 | Mutual inductor turn number conversion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |