CN105575642A - Three-phase integrated voltage transformer internally provided with resistors - Google Patents
Three-phase integrated voltage transformer internally provided with resistors Download PDFInfo
- Publication number
- CN105575642A CN105575642A CN201610111168.9A CN201610111168A CN105575642A CN 105575642 A CN105575642 A CN 105575642A CN 201610111168 A CN201610111168 A CN 201610111168A CN 105575642 A CN105575642 A CN 105575642A
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- pin
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- voltage transformer
- resistance
- integral
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Links
- 238000004804 winding Methods 0.000 claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000009413 insulation Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 239000005300 metallic glass Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000011162 core material Substances 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase ac
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
A three-phase integrated voltage transformer internally provided with resistors comprises a shell and a cover plate. The shell comprises three cavities. Every two connected cavities are isolated through an insulating plate. An iron core is arranged in each cavity. A primary winding and a secondary winding are wound on each iron core. The cover plate can be clamped to the shell and is provided with windows corresponding to the cavities one to one. A pin A, a pin B, a pin C and a pin D are arranged around each window. Each resistor is arranged between the corresponding pin C and the corresponding pin D. Each pin A and the corresponding pin B are connected with two end points of the corresponding primary winding respectively. Each pin C and the corresponding pin D are connected with two end points of the corresponding secondary winding respectively. Devices and components are orderly and attractively arranged on a printed circuit board, electromagnetic interference caused by improper layout is avoided, work performance is improved, more importantly, the size of the printed circuit board is reduced, and miniaturization of the printed circuit board is achieved.
Description
Technical field
The present invention relates to electrical equipment, particularly relate to a kind of in establish the Integral three-phase voltage transformer of resistance.
Background technology
Along with industrial equipment is day by day accurate, electronic product is towards miniaturized, digital development, and printed circuit board is also towards high density, high accuracy development.Printed circuit plate bulk has become the major reason of restriction miniaturization of electronic products.The basic ideas of reduced volume can from improve circuit board measure of precision, reduce components and parts volume and launched to several aspects such as three-dimensional development by two dimension.
Existing voltage transformer mostly is three phase separation, therefore three single-phase potential transformers are often needed to meet the demand of three-phase circuit, although also have three-phase integrated voltage transformer now, but it is short of neat and attractive in appearance in the layout of circuit board, there is serious electromagnetic interference, the service behaviour that result in voltage transformer is low, in addition simultaneously, resistance is arranged on voltage transformer outside and the volume of whole device is increased, and is unfavorable for the saving in space.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention propose a kind of in establish the Integral three-phase voltage transformer of resistance, make the neat and attractive in appearance of each components and parts layout on a printed circuit board, avoid the improper electromagnetic interference caused of layout, improve service behaviour, the prior volume reducing printed circuit board, realizes the miniaturization of printed circuit board.
To achieve these goals, technical scheme of the present invention is:
In establish the Integral three-phase voltage transformer of resistance, it is characterized in that, comprise housing and cover plate, described housing comprises three chambers, and two the chamber insulation boards be connected with each other are isolated; Each described chamber is mid-cored, described iron core is wrapped armature winding and secondary winding; Described cover plate can engage on the housing, and described cover plate is provided with and chamber window one to one; Described window periphery is provided with four and draws pin: A draws pin, B draws pin, C draws pin and D draws pin; Described C draws pin and D and draws between pin and be provided with resistance; Described A draws pin and B and draws two end points that pin is connected armature winding respectively, and described C draws pin and D and draws two end points that pin is connected secondary winding respectively.
Described cover plate upper surface, C draw the side that pin and D draw pin and are provided with identification hole.
Described iron core and armature winding contact-making surface are covered with insulating barrier; Described iron core and secondary winding contact-making surface are covered with insulating barrier.
Described armature winding is the copper cash of plated surface paint.
Described secondary winding is the copper cash of plated surface paint.
The lower surface of described cover plate is provided with draw-in groove, described housing be provided with the groove used with described pocket matches.
The lower surface of described cover plate is provided with projection.
Described A draws pin, B draws pin, C draws pin and D draws pin and is conductive metal pin.
The cross section that described A draws pin, B draws pin, C draws pin and D draws pin is circle or rectangle.
The shape of described iron core is annular.
Described core material is magnetic material.
Described magnetic material is amorphous metal or microcrystalline metal.
Described housing is cuboid housing, and the height of described insulation board is lower than the height of described cuboid housing.
Beneficial effect of the present invention for: what the technical program proposed is a accurate voltage transformer, to three voltage transformer monomer incorporation on a printed circuit board be used together, the layout of components and parts on circuit board can be improved, effectively prevent the improper electromagnetic interference caused of components and parts arrangement.Another most significant advantage of voltage transformer of the present invention is, the space of Appropriate application instrument transformer, by output resistance R
lput at instrument transformer inner, save circuit board space.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is each part structural representation.
Fig. 3 is shell structure schematic diagram.
Fig. 4 is the perspective view of depression angle lower cover.
Fig. 5 is the perspective view looking up angle lower cover.
Fig. 6 is the schematic diagram of draw-in groove and groove;
Fig. 7 is cover plate vertical view.
Fig. 8 is iron core and elementary, secondary winding structural representation.
Fig. 9 is the circuit theory diagrams in single-phase potential transformer use procedure.
In figure: 1. housing; 2. cover plate; 3. coil; 31. closure periphery; 32. insulation boards; 33. draw-in grooves; 42. windows; 43. draw pin; 44. resistance; 45. identification holes; 46. grooves; 47. is protruding; 71. iron cores; 72. armature windings; 73. secondary winding.
Embodiment
In order to better understand technical scheme of the present invention, below in conjunction with accompanying drawing, the invention will be further described.
In establish the Integral three-phase voltage transformer of resistance, on printed circuit board, isolate forceful electric power, using for three-phase electricity need simultaneously with three voltage transformer monomer, and concrete this voltage transformer monomer use circuit is as shown in Figure 9.
Be this voltage transformer in dotted line, N1 is armature winding, and N2 is secondary winding, N1:N2=1:1.Input voltage vin (Vin=220V) is produced a small area analysis by the effect of current-limiting resistance R (R=110K Ω) and flows into transformer primary winding, the electric current of same size of being inducted by electromagnetic induction effect secondary winding, then by output resistance R
l, output voltage Vout.
Being directed to this voltage transformer scope of application is three-phase electricity, needs to use three monomers simultaneously, and three instrument transformers combine easy to use by the present invention, more effectively prevents the electromagnetic interference caused because instrument transformer arrangement is on circuit boards improper.By output resistance R
lbe set to voltage transformer of the present invention inner, Appropriate application instrument transformer space, can be the effect that space that circuit board saves three resistance realizes reducing circuit board volume.Later stage can be considered to increase voltage transformer volume of the present invention, is added to by current-limiting resistance R in voltage transformer of the present invention, realizes the effect reducing circuit board volume further.
As shown in Figures 1 to 4, establish the Integral three-phase voltage transformer of resistance, it is characterized in that in a kind of, comprise housing 1 and cover plate 2, described housing comprises three chambers, and two the chamber insulation boards 31 be connected with each other are isolated; Each described chamber mid-cored 71, described iron core is wrapped armature winding 72 and secondary winding 73; Described cover plate can engage on the housing, and described cover plate is provided with and chamber window 42 one to one; Described window periphery is provided with four and draws that pin 43:A draws pin, B draws pin, C draws pin and D draws pin; Described C draws pin and D and draws between pin and be provided with resistance 44; Described A draws pin and B and draws two end points that pin is connected armature winding respectively, and described C draws pin and D and draws two end points that pin is connected secondary winding respectively.
Described cover plate upper surface, C draw the side that pin and D draw pin and are provided with identification hole 45.
Described iron core and armature winding contact-making surface are covered with insulating barrier; Described iron core and secondary winding contact-making surface are covered with insulating barrier.
Described armature winding is the copper cash of plated surface paint.
Described secondary winding is the copper cash of plated surface paint.
As shown in Figure 6, the lower surface of described cover plate is provided with draw-in groove 33, described housing be provided with the groove 46 used with described pocket matches.
The lower surface of described cover plate is provided with protruding 47.
Described A draws pin, B draws pin, C draws pin and D draws pin and is conductive metal pin.
The cross section that described A draws pin, B draws pin, C draws pin and D draws pin is circle or rectangle.
The shape of described iron core is annular.
Described core material is magnetic material.
Described magnetic material is amorphous metal or microcrystalline metal.
Described housing is cuboid housing, and the height of described insulation board is lower than the height of described cuboid housing.
The process manufacturing voltage transformer of the present invention is as follows: voltage transformer of the present invention is welded on cover plate 2 by coil 3 and draws after on pin 43, and cover plate 2 and protective case 1 are entrenched togather and inject epoxide-resin glue and form by hot curing.Coil comprises armature winding and secondary winding.Voltage transformer of the present invention is a tight type voltage transformer, and specification size only has long 28mm, wide 19mm and high 25mm.
According to the requirement of instrument transformer national standard, the type selecting of voltage transformer protective case of the present invention, cover plate and epoxy resin glue material selects flame retardant type macromolecular material.
According to the sequencing of manufacture craft, can describe from coil 3.
First be that insulation processing is carried out to magnetive cord 71, bag thin film or add customized shell, prevent iron core 71 and enamelled wire direct contact to cause puncture just this grade of winding coil by iron core 71 as Medium Voltage.Then be enamelled wire formation primary coil 72 and the secondary coil 73 of the certain number of turn of coiling on iron core.Require between primary and secondary coil reserved certain distance gap can not Contact, be also to prevent voltage breakdown between primary and secondary winding from causing damage.The coil of the good primary and secondary winding of coiling as shown in Figure 8.
Next be that first pretreatment work is carried out to cover plate 2, as shown in Figure 4, Figure 5 and Figure 6, with an identification point 45 on cover plate 2, for distinguish determine to draw pin 43 and primary and secondary winding the end of a thread weld relation.Here the pin that once draws at identification point 45 place is all weld with the secondary winding 73 of three coils 3.After determining this welding relation, by three resistance 44, i.e. output resistance R
lbe separately fixed at and draw on position shown in pin 43 Fig. 4 or Fig. 5.After fixing, use flatiron and Xi Si firmly to be welded together with drawing pin 43 by its resistance 44, highlighting here and drawing the superiority of pin 43 with turning, adding projection 47 partial fixing and draw pin 43, be easier to the operation adding resistance operation.
After cover plate 2 preliminary treatment, be exactly coil 3 and draw welding of pin 43.Coil 3 is the one_to_one corresponding of the primary and secondary winding leading-out wire head drawing pin 43 and coil 3 with the crucial part of the bonding wire drawing pin 43.Corresponding protective case 1 is three cavitys, and drawing pin 43 and can be divided into three groups on cover plate 2, one group four are drawn the corresponding coil 3 of pin 43.Two extraction the end of a thread of the armature winding 72 of coil 3 are connected on the side not having identification point 45, and two extraction the end of a thread of secondary winding 73 are connected on the side with identification point 45.Same, the extraction joint of all coils 3 all needs zinc-plated process with the coupling part of drawing pin 43, stops the generation of the product bug of loose contact.Shown in Fig. 2, vivid finds out coil 3 and the corresponding relation drawing pin 43.
The vertical view of Fig. 7 cover plate, this figure is mainly in order to embody the position relationship drawn between pin.Draw pin A consistent with the height drawing the direct beeline of pin B and coil, embody minimizing of voltage transformer of the present invention.Draw pin B and the distance of drawing between pin C is then divided into outer distance and inner distance two parts.Outer distance is chosen as 12.7mm, becomes integral multiple, can realize the row's of being inserted in pin uses with the spacing between row's pin; Inner distance then matches with the maximum gauge of coil, is to realize minimizing of voltage transformer of the present invention equally.
Next cover plate 2 and coil 3 are installed in protective case 1, after the adhesive curing of injection moulding epoxy resin, voltage transformer of the present invention can be completed.Protective case 1 and cover plate 2 are realized by mold injection molding technique, and closure periphery 31 has draw-in groove 33 part, and fluted 46 parts in cover plate 2 edge, can realize housing 1 chimeric with the perfection of cover plate 2.
Protective case 1 inside is divided into three cavitys by twice wall 32, puts into a coil 3 respectively, can be considered and is bundled by three monomers.Realize the object used together of three monomers, simplify the operation technique, optimizes the layout of printed circuit board component, saves space, improve the quality of products and efficiency.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. establish an Integral three-phase voltage transformer for resistance in, it is characterized in that, comprise housing and cover plate, described housing comprises three chambers, and two the chamber insulation boards be connected with each other are isolated; Each described chamber is mid-cored, described iron core is wrapped armature winding and secondary winding; Described cover plate can engage on the housing, and described cover plate is provided with and chamber window one to one; Described window periphery is provided with four and draws pin: A draws pin, B draws pin, C draws pin and D draws pin; Described C draws pin and D and draws between pin and be provided with resistance; Described A draws pin and B and draws two end points that pin is connected armature winding respectively, and described C draws pin and D and draws two end points that pin is connected secondary winding respectively.
2. according to claim 1 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, described cover plate upper surface, C draw the side that pin and D draw pin and are provided with identification hole.
3. according to claim 1 and 2 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, described iron core and armature winding contact-making surface are covered with insulating barrier; Described iron core and secondary winding contact-making surface are covered with insulating barrier.
4. according to claim 1 and 2 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, described armature winding is the copper cash of plated surface paint; Described secondary winding is the copper cash of plated surface paint.
5. according to claim 1 and 2 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, the lower surface of described cover plate is provided with draw-in groove, described housing be provided with the groove used with described pocket matches.
6. according to claim 1 and 2 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, the lower surface of described cover plate is provided with projection.
7. according to claim 1 and 2 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, described A draws pin, B draws pin, C draws pin and D draws pin and is conductive metal pin; The cross section that described A draws pin, B draws pin, C draws pin and D draws pin is circle or rectangle.
8. according to claim 1 and 2 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, the shape of described iron core is ring magnetic material.
9. according to claim 8 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, described magnetic material is amorphous metal or microcrystalline metal.
10. according to claim 1 and 2 a kind of in establish the Integral three-phase voltage transformer of resistance, it is characterized in that, described housing is cuboid housing, and the height of described insulation board is lower than the height of described cuboid housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610111168.9A CN105575642B (en) | 2016-02-29 | 2016-02-29 | The Integral three-phase voltage transformer of resistance is set in a kind of |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610111168.9A CN105575642B (en) | 2016-02-29 | 2016-02-29 | The Integral three-phase voltage transformer of resistance is set in a kind of |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105575642A true CN105575642A (en) | 2016-05-11 |
| CN105575642B CN105575642B (en) | 2018-06-26 |
Family
ID=55885670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610111168.9A Active CN105575642B (en) | 2016-02-29 | 2016-02-29 | The Integral three-phase voltage transformer of resistance is set in a kind of |
Country Status (1)
| Country | Link |
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| CN (1) | CN105575642B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057454A (en) * | 2016-06-27 | 2016-10-26 | 国网江苏省电力公司盐城供电公司 | Middle-high voltage zero sequence current transformer |
| CN110600240A (en) * | 2019-09-29 | 2019-12-20 | 济南铂晶电子科技有限公司 | Subminiature mutual inductor, combined mutual inductor and mutual inductor framework |
| US20210082612A1 (en) * | 2019-09-18 | 2021-03-18 | Autonetworks Technologies, Ltd. | Reactor |
| CN114512313A (en) * | 2022-02-22 | 2022-05-17 | 中山市华讯电器有限公司 | Current transformer with rated secondary current lower than 1A |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2232051A1 (en) * | 1973-06-01 | 1974-12-27 | Unelec | Encapsulated three-phase transformer connecting board - printed circuit paths with removable wiring bridges for winding rearrangement |
| CN2129452Y (en) * | 1992-09-24 | 1993-04-07 | 成都市互感器厂 | Current-voltage changer |
| JPH09186036A (en) * | 1997-02-05 | 1997-07-15 | Hokuriku Electric Ind Co Ltd | Flyback transformer |
| CN2494552Y (en) * | 2001-08-23 | 2002-06-05 | 常熟开关厂 | Current transformer |
| CN201435305Y (en) * | 2009-06-03 | 2010-03-31 | 河北申科电子股份有限公司 | Current and voltage transformer module |
| CN102709045A (en) * | 2012-06-15 | 2012-10-03 | 四川泰克电器有限公司 | Combined mutual inductor |
| CN203774080U (en) * | 2014-04-15 | 2014-08-13 | 云南电网公司普洱供电局 | Three-phase self-boosting standard voltage transformer |
| CN204117836U (en) * | 2014-02-18 | 2015-01-21 | 瑞安市工泰电器有限公司 | Penetration type universal interchangeable threephase current transformer |
| CN205582719U (en) * | 2016-02-29 | 2016-09-14 | 济南铂晶电子科技有限公司 | Interior three -phase integral type voltage transformer who establishes resistance |
-
2016
- 2016-02-29 CN CN201610111168.9A patent/CN105575642B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2232051A1 (en) * | 1973-06-01 | 1974-12-27 | Unelec | Encapsulated three-phase transformer connecting board - printed circuit paths with removable wiring bridges for winding rearrangement |
| CN2129452Y (en) * | 1992-09-24 | 1993-04-07 | 成都市互感器厂 | Current-voltage changer |
| JPH09186036A (en) * | 1997-02-05 | 1997-07-15 | Hokuriku Electric Ind Co Ltd | Flyback transformer |
| CN2494552Y (en) * | 2001-08-23 | 2002-06-05 | 常熟开关厂 | Current transformer |
| CN201435305Y (en) * | 2009-06-03 | 2010-03-31 | 河北申科电子股份有限公司 | Current and voltage transformer module |
| CN102709045A (en) * | 2012-06-15 | 2012-10-03 | 四川泰克电器有限公司 | Combined mutual inductor |
| CN204117836U (en) * | 2014-02-18 | 2015-01-21 | 瑞安市工泰电器有限公司 | Penetration type universal interchangeable threephase current transformer |
| CN203774080U (en) * | 2014-04-15 | 2014-08-13 | 云南电网公司普洱供电局 | Three-phase self-boosting standard voltage transformer |
| CN205582719U (en) * | 2016-02-29 | 2016-09-14 | 济南铂晶电子科技有限公司 | Interior three -phase integral type voltage transformer who establishes resistance |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057454A (en) * | 2016-06-27 | 2016-10-26 | 国网江苏省电力公司盐城供电公司 | Middle-high voltage zero sequence current transformer |
| US20210082612A1 (en) * | 2019-09-18 | 2021-03-18 | Autonetworks Technologies, Ltd. | Reactor |
| US11521779B2 (en) * | 2019-09-18 | 2022-12-06 | Autonetworks Technologies, Ltd. | Reactor |
| CN110600240A (en) * | 2019-09-29 | 2019-12-20 | 济南铂晶电子科技有限公司 | Subminiature mutual inductor, combined mutual inductor and mutual inductor framework |
| CN114512313A (en) * | 2022-02-22 | 2022-05-17 | 中山市华讯电器有限公司 | Current transformer with rated secondary current lower than 1A |
| CN114512313B (en) * | 2022-02-22 | 2022-10-14 | 中山市华讯电器有限公司 | Current transformer with rated secondary current lower than 1A |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105575642B (en) | 2018-06-26 |
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