CN103474223A - High-voltage equipotential opening current transformer - Google Patents
High-voltage equipotential opening current transformer Download PDFInfo
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- CN103474223A CN103474223A CN2013103650327A CN201310365032A CN103474223A CN 103474223 A CN103474223 A CN 103474223A CN 2013103650327 A CN2013103650327 A CN 2013103650327A CN 201310365032 A CN201310365032 A CN 201310365032A CN 103474223 A CN103474223 A CN 103474223A
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- current transformer
- high pressure
- flange
- iron core
- opening current
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Abstract
The invention relates to a high-voltage equipotential opening current transformer which comprises an iron core; the iron core comprises a starting end and a fixed seat; the starting end is connected with the fixed seat by a bolt; after the starting end is connected with the fixed seat, a primary lead through hole can be formed. Compared with the prior art, the high-voltage equipotential opening current transformer has the advantages of avoiding the problem that an insulating overhead line can not pass through the current transformer, solving the problem that the insulating overhead line is difficult to install since the wiring angle of the insulating overhead line passing through the current transformer is too small, and the like.
Description
Technical field
The present invention relates to a kind of current transformer, especially relate to the equipotential opening current transformer of a kind of high pressure.
Background technology
Current transformer is the current sample mode of generally applying in electric power system.The sense samples of current high voltage side current, what usually adopt is that through current transformer, isolation is converted to the little current signal of secondary side by the large electric current of high pressure primary side, and the no-load voltage ratio that measured current value is multiplied by current transformer by secondary side calculates the actual numerical value of the large electric current of primary side.The secondary singal of current transformer is exported to the secondary devices such as electric energy meter, protective device, pressure line monitoring device.
Along with the development of intelligent grid, in high-tension line, the new equipments such as newly-increased Intellectualized metering equipment, intelligent protection unit are day by day universal.And at the scene due to the high-voltage line in supply line in running status, if the sampling of newly-increased high-tension current needs to break high-voltage line serial connection current transformer just can complete current measurement, this has just increased the line disconnection node, has increased the workload of circuit homework.
Simultaneously, traditional current transformer with secondary, be once insulation isolation, the current flow ratings of the specified output of secondary is 1A or 5A, this also makes the current transformer volume larger, need to take more installing space.And the high-voltage intelligent collecting device that novel high pressure once is integrated with secondary, as high-voltage electric energy meter, the direct protective device of high-tension line etc., all only has the interface of miniaturization partly to match with current sample, traditional instrument transformer is difficult to realize this application.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of high pressure equipotential opening current transformer in order to overcome the defect that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
The equipotential opening current transformer of a kind of high pressure is characterized in that comprise iron core, this iron core comprises opening end, holder, and described opening end is connected with holder by bolt, after described opening end is connected with holder, forms a wire center hole.
The cross section of described opening end is the semicircle annular.
Described holder lower end is provided with the flange installed surface, this flange installed surface is provided with the flange installation screw, secondary wiring is drawn screw hole cap, insulated enclosure circle, described flange installation screw is distributed on the excircle of flange installed surface, and described insulated enclosure circle is located on the excircle of lower surface of flange installed surface.
A described wire center hole surface is provided with antirust coat.
Described iron core is silicon steel sheet or amorphous ultracrystallite material.
Compared with prior art, the present invention has the following advantages:
1, for the flexibility of on-site installation work out of doors, consider, realized a kind of open type current transformer, this design avoid the insulating frame ceases to be busy can't punching by the problem of current transformer, also solved the insulating frame ceases to be busy through the too little problem of installing that is difficult to of current transformer cabling angle.
2, adopt the equipotential current mutual inductor with high transforming ratio design in high-pressure side, the volume and weight of current transformer reduces greatly, contributes to the miniaturization of high-voltage intelligent device to implement simultaneously.
The accompanying drawing explanation
Fig. 1 is perspective view of the present invention;
Fig. 2 is main TV structure schematic diagram of the present invention;
Fig. 3 is side-looking structural representation of the present invention;
Fig. 4 is the structural representation of looking up of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the equipotential opening current transformer of a kind of high pressure, comprise iron core, and this iron core comprises opening end 2, holder 4, described opening end 2 is connected with holder 4 by bolt 3, after described opening end 2 is connected with holder 3, forms a wire center hole 1.
The cross section of described opening end 2 is the semicircle annular.Described holder 4 lower ends are provided with flange installed surface 8, this flange installed surface 8 is provided with flange installation screw 5, secondary wiring is drawn screw hole cap 6, insulated enclosure circle 7, described flange installation screw 5 is distributed on the excircle of flange installed surface 8, and described insulated enclosure circle 7 is located on the excircle of lower surface of flange installed surface 8.Described wire center hole 1 surface is provided with antirust coat.
The scheme of the large velocity ratio that current transformer is low-power consumption, the specified output of secondary is not 1A and 5A, is 0.1A or less signaling interface form.The output of the secondary of current transformer also in a high-tension line be equipotential, the potential difference of its secondary side and primary side is only that 5V is with interior ac small signal.
The iron core of current transformer is silicon steel sheet or amorphous ultracrystallite material.Iron core in current transformer adopts epoxy resin encapsulated to fill.
Current transformer has the flange installation screw 5 of flange face, can pass through to adjust the fixed position of flange installation screw 5, and obtain different current transformer setting angles.
For 10kV outdoor type high-voltage electric energy meter, its rated operational current is 500A,, the application implementation mode of this patent is:
1) nominal transformation ratio of current transformer is 500A: 0.1A; Current transformer adopts ultra-thin silicon steel disc that magnetic permeability is higher as iron core, and semicircle unshakable in one's determination and secondary winding adopts poured with epoxy resin within containing the housing of flange face.
2) the primary current wire is stuck in two semicircular centres.During installation, close after semicircular opening section, fastening stainless steel bolt completes fixing.
3), when needs are adjusted the layout direction of primary current wire, can adjust flange installation screw 5 positions of current transformer flange face.
4) output of the secondary of current transformer is linked in the interior metering circuit of outdoor type high-voltage electric energy meter, and the sampling voltage of metering circuit is less than 5V, the high-voltage that the ground reference of secondary outlet side is the current transformer primary side.
The formed current transformer weight of this programme is only 1 kilogram, with the weight of conventional high-tension current transformer, compares and has substantial degradation.
Claims (5)
1. the equipotential opening current transformer of high pressure, is characterized in that, comprise iron core, this iron core comprises opening end, holder, and described opening end is connected with holder by bolt, after described opening end is connected with holder, forms a wire center hole.
2. the equipotential opening current transformer of a kind of high pressure according to claim 1, is characterized in that, the cross section of described opening end is the semicircle annular.
3. the equipotential opening current transformer of a kind of high pressure according to claim 1, it is characterized in that, described holder lower end is provided with the flange installed surface, this flange installed surface is provided with the flange installation screw, secondary wiring is drawn screw hole cap, insulated enclosure circle, described flange installation screw is distributed on the excircle of flange installed surface, and described insulated enclosure circle is located on the excircle of lower surface of flange installed surface.
4. the equipotential opening current transformer of a kind of high pressure according to claim 1, is characterized in that, a described wire center hole surface is provided with antirust coat.
5. the equipotential opening current transformer of a kind of high pressure according to claim 1, is characterized in that, described iron core is silicon steel sheet or amorphous ultracrystallite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310365032.7A CN103474223B (en) | 2013-08-20 | 2013-08-20 | The equipotential opening current transformer of a kind of high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310365032.7A CN103474223B (en) | 2013-08-20 | 2013-08-20 | The equipotential opening current transformer of a kind of high pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103474223A true CN103474223A (en) | 2013-12-25 |
| CN103474223B CN103474223B (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310365032.7A Active CN103474223B (en) | 2013-08-20 | 2013-08-20 | The equipotential opening current transformer of a kind of high pressure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB226174A (en) * | 1923-12-11 | 1925-06-25 | Siemens Ag | Improvements in or relating to high tension current transformers |
| CN2391363Y (en) * | 1999-06-22 | 2000-08-09 | 北京兴东方电力设备研究所 | Open type zero-sequence current protector |
| CN201498350U (en) * | 2009-07-31 | 2010-06-02 | 奥菲科泰电气(北京)有限公司 | Outdoor open current mutual inductor |
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
-
2013
- 2013-08-20 CN CN201310365032.7A patent/CN103474223B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB226174A (en) * | 1923-12-11 | 1925-06-25 | Siemens Ag | Improvements in or relating to high tension current transformers |
| CN2391363Y (en) * | 1999-06-22 | 2000-08-09 | 北京兴东方电力设备研究所 | Open type zero-sequence current protector |
| CN201498350U (en) * | 2009-07-31 | 2010-06-02 | 奥菲科泰电气(北京)有限公司 | Outdoor open current mutual inductor |
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
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| Publication number | Publication date |
|---|---|
| CN103474223B (en) | 2016-01-27 |
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