CN103474223B - The equipotential opening current transformer of a kind of high pressure - Google Patents
The equipotential opening current transformer of a kind of high pressure Download PDFInfo
- Publication number
- CN103474223B CN103474223B CN201310365032.7A CN201310365032A CN103474223B CN 103474223 B CN103474223 B CN 103474223B CN 201310365032 A CN201310365032 A CN 201310365032A CN 103474223 B CN103474223 B CN 103474223B
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- current transformer
- high pressure
- holder
- flange
- equipotential
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims description 12
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The present invention relates to the equipotential opening current transformer of a kind of high pressure, comprise iron core, this iron core comprises opening end, holder, and described opening end is connected with holder by bolt, forms a wire center hole after described opening end is connected with holder.Compared with prior art, the present invention have avoid insulating frame ceases to be busy cannot punching by the problem of current transformer, also solve insulating frame ceases to be busy through current transformer cabling angle is too little and be difficult to the advantages such as the problem of installing.
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 generally applied in electric power system.The sense samples of current high voltage side current, usual employing be that high pressure primary side big current is converted to the small area analysis signal of secondary side through current transformer isolation, the current value measured by secondary side is multiplied by the no-load voltage ratio of current transformer to calculate the actual numerical value of primary side big current.The secondary singal of current transformer exports 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 newly-increased new equipment such as Intellectualized metering equipment, intelligent protection unit is day by day popularized.And at the scene because the high-voltage line in supply line is in running status, if newly-increased high-tension current sampling, then needing to break high-voltage line serial connection current transformer just can complete current measurement, this adds increased line disconnection node, add the workload of circuit homework.
Meanwhile, traditional current transformer be once insulate to isolate with secondary, the current flow ratings of the specified output of secondary is 1A or 5A, and this also makes current transformer volume comparatively large, needs to take more installing space.And the high-voltage intelligent collecting device that novel high pressure is once integrated with secondary, as high-voltage electric energy meter, the direct protective device of high-tension line etc., all only have miniaturized interface to match with current sample part, traditional instrument transformer is difficult to realize this application.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and provide a kind of high pressure equipotential opening current transformer.
Object of the present invention can be achieved through the following technical solutions:
The equipotential opening current transformer of a kind of high pressure, it is characterized in that, comprise iron core, this iron core comprises opening end, holder, and described opening end is connected with holder by bolt, forms a wire center hole after described opening end is connected with holder.
The cross section of described opening end is semi-circular shape.
Described holder lower end is provided with flange installed surface, this flange installed surface is provided with flange installation screw, secondary wiring draws 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 the 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 Superfine crystal material.
Compared with prior art, the present invention has the following advantages:
1, the flexibility for on-site installation work is out of doors considered, achieve a kind of open type current transformer, this design avoid insulating frame ceases to be busy cannot punching by the problem of current transformer, also solve insulating frame ceases to be busy through the too little problem being difficult to install 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, and the miniaturization contributing to high-voltage intelligent device is implemented simultaneously.
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 of the present inventionly looks up structural representation.
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, this iron core comprises opening end 2, holder 4, described opening end 2 is connected with holder 4 by bolt 3, and described opening end 2 is connected rear formation wire center hole 1 with holder 3.
The cross section of described opening end 2 is semi-circular shape.Described holder 4 lower end is provided with flange installed surface 8, this flange installed surface 8 is provided with flange installation screw 5, secondary wiring draws 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 the lower surface of flange installed surface 8.Described wire center hole 1 surface is provided with antirust coat.
Current transformer is the scheme of the large velocity ratio of low-power consumption, and the specified output of secondary is not 1A and 5A, is 0.1A or less signaling interface form.The secondary of current transformer exports that to be also in a high-tension line be equipotential, and the potential difference of its secondary side and primary side is only the ac small signal within 5V.
The iron core of current transformer is silicon steel sheet or amorphous Superfine crystal material.Iron core in current transformer adopts epoxy resin encapsulated to fill.
Current transformer has the flange installation screw 5 of flange face, by the fixed position of adjustment flange installation screw 5, and can 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 the higher ultra-thin silicon steel disc of magnetic permeability as iron core, and semicircle unshakable in one's determination and secondary winding adopts poured with epoxy resin in the housing containing flange face.
2) primary current wire is stuck in two semicircular centres.Close during installation after semicircular opening section, fastening stainless steel bolt completes fixing.
3) in time needing the layout direction adjusting primary current wire, flange installation screw 5 position of current transformer flange face can be adjusted.
4) secondary of current transformer exports and is linked in outdoor type high-voltage electric energy meter in metering circuit, and the sampling voltage of metering circuit is less than 5V, and the ground reference of secondary outlet side is the high-voltage of current transformer primary side.
The current transformer weight that this programme is formed is only 1 kilogram, has substantial degradation compared with the weight of conventional high-tension current transformer.
Claims (4)
1. the equipotential opening current transformer of high pressure, it is characterized in that, comprise iron core, this iron core comprises opening end, holder, and described opening end is connected with holder by bolt, forms a wire center hole after described opening end is connected with holder;
Described holder lower end is provided with flange installed surface, this flange installed surface is provided with flange installation screw, secondary wiring draws 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 the lower surface of flange installed surface; By the fixed position of adjustment flange installation screw, and obtain different current transformer setting angles.
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 semi-circular shape.
3. 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.
4. 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 Superfine crystal 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 CN103474223A (en) | 2013-12-25 |
| CN103474223B true CN103474223B (en) | 2016-01-27 |
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Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN103474223B (en) |
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 |
|---|---|
| CN103474223A (en) | 2013-12-25 |
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