CN218274231U - Current transformer - Google Patents
Current transformer Download PDFInfo
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- CN218274231U CN218274231U CN202222780444.4U CN202222780444U CN218274231U CN 218274231 U CN218274231 U CN 218274231U CN 202222780444 U CN202222780444 U CN 202222780444U CN 218274231 U CN218274231 U CN 218274231U
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- wiring board
- shielding layer
- connecting plate
- current transformer
- conductive column
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Abstract
The utility model discloses a current transformer, which relates to the technical field of current transformers and comprises a first wiring board, a first connecting board, a conductive column, a secondary coil, a second connecting board, a second wiring board, a casting body, a first wiring board shielding layer and a second wiring board shielding layer, wherein a connecting structure formed by the first wiring board, the first connecting board, the conductive column, the second connecting board and the second wiring board can conduct electricity; the first wiring board shielding layer is used for being fixedly arranged in the casting body, the first wiring board shielding layer is used for being arranged below the first wiring board and being in contact with the first wiring board, and the outer contour of the first wiring board shielding layer is larger than that of the first wiring board; the second wiring board shielding layer is used for the fixed pouring body of locating, and the second wiring board shielding layer is used for arranging the below of second wiring board in and contacts with the second wiring board, and the outline of second wiring board shielding layer is greater than the outline of second wiring board, the utility model discloses a current transformer can reduce partial discharge effectively.
Description
Technical Field
The utility model relates to a current transformer technical field especially relates to a current transformer.
Background
The current transformer converts a large primary side current into a small secondary side current for use, and consists of a closed iron core and a winding, the number of turns of the primary side winding of the current transformer is small, and the primary side winding is connected in series in a circuit of a current to be measured, so that all the current of the circuit always flows through the primary side winding, the number of turns of the secondary side winding is large, the secondary side winding is connected in series in a measuring instrument and a protection loop, and when the current transformer works, the secondary side loop is always closed, and the impedance of a secondary coil connected in series with the measuring instrument and the protection loop is small.
With the rapid development of electric power construction in China, the long-term insulation performance of the current transformer in a power grid and a high-voltage power transformation system is more and more emphasized, the partial discharge condition of the current transformer is improved, and the product quality of the current transformer can be effectively improved.
In the prior art, the control of the partial discharge of the current transformer often has great limitations, for example, the current transformer disclosed in chinese patent CN201749778U realizes insulation protection by "the casting is epoxy casting", but defects such as sharp corners, burrs and the like are often inevitably generated on the surface of the current transformer in the processing and manufacturing process of the wiring board, resulting in the partial discharge of the surface of the wiring board, and meanwhile, the existence of air gaps possibly formed at the wiring board in the casting molding process of the casting also further aggravates the situation of the partial discharge of the surface of the wiring board, and affects the product quality of the current transformer.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a current transformer to solve the problem that above-mentioned prior art exists, can reduce partial discharge effectively.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a current transformer, which comprises a first wiring board, a first connecting board, a conductive column, a secondary coil, a second connecting board, a second wiring board, a casting body, a first wiring board shielding layer and a second wiring board shielding layer, wherein the first wiring board and the second wiring board are all used for being fixedly arranged at one end of the casting body; one end of the first connecting plate is used for being fixedly arranged on the first connecting plate, the other end of the first connecting plate is used for being fixedly arranged at one end of the conductive column, the other end of the conductive column is used for being fixedly connected with one end of the second connecting plate, the other end of the second connecting plate is used for being fixedly arranged on the second connecting plate, and a connecting structure formed by the first connecting plate, the conductive column, the second connecting plate and the second connecting plate can conduct electricity; the secondary coil is fixedly sleeved on the conductive column, and a space is reserved between the secondary coil and the conductive column in the radial direction of the conductive column; the first wiring board shielding layer is used for being fixedly arranged in the casting body, the first wiring board shielding layer is used for being arranged below the first wiring board and being in contact with the first wiring board, and the outer contour of the first wiring board shielding layer is larger than that of the first wiring board; the second wiring board shielding layer is used for being fixedly arranged in the casting body, the second wiring board shielding layer is used for being arranged below the second wiring board and being in contact with the second wiring board, and the outer contour of the second wiring board shielding layer is larger than that of the second wiring board.
Preferably, still include first connecting plate shielding layer and second connecting plate shielding layer, first connecting plate shielding layer with second connecting plate shielding layer all is used for fixed locating in the pouring body, first connecting plate shielding layer is used for the cover to be located first connecting plate is kept away from the one end of first wiring board, just first connecting plate shielding layer is used for arranging in keeping away from of first connecting plate lead one side of electrical pillar, second connecting plate shielding layer is used for the cover to be located the second connecting plate is kept away from the one end of second wiring board, just second connecting plate shielding layer is used for arranging in keeping away from of second connecting plate lead one side of electrical pillar.
Preferably, the first wiring board shielding layer adopts a first metal net, the second wiring board shielding layer adopts a second metal net, the first connecting board shielding layer adopts a third metal net, and the second connecting board shielding layer adopts a fourth metal net.
Preferably, the mounting device further comprises a mounting base, the mounting base is used for being fixedly arranged at one end, far away from the first wiring board, of the pouring body, and a first grounding inlay and a second grounding inlay are arranged on the surface, close to the conductive column, of the mounting base; the one end of keeping away from on the first connecting plate shielding layer first wiring board be used for fixed connection in on the first ground connection inlay, the one end of keeping away from on the second connecting plate shielding layer second wiring board be used for fixed connection in on the second ground connection inlay.
Preferably, the first wiring board shielding layer is used for being fixedly connected with the first wiring board, and the second wiring board shielding layer is used for being fixedly connected with the second wiring board.
Preferably, the first wiring board shield layer is adapted to be bolted to the first wiring board, and the second wiring board shield layer is adapted to be bolted to the second wiring board.
Preferably, the secondary coil includes a conductive wire and an annular iron core, the annular iron core is used for being fixedly sleeved on the conductive column, and a space is reserved between the annular iron core and the conductive column in the radial direction of the conductive column; the lead is used for being fixedly wound on the annular iron core.
The utility model discloses for prior art gain following technological effect:
the utility model provides a current transformer, through setting up the first wiring board shielding layer to the closed angle that first wiring board surface produced in the course of working, burr and the air gap that leaves between first wiring board and the pouring body shield, improve the electric field distribution of first wiring board, and then reduce the partial discharge of first wiring board department effectively; through setting up the air gap that leaves between closed angle, burr and second wiring board and the pouring body that second wiring board shielding layer produced to second wiring board surface in the course of working and shielding, improve the electric field distribution of second wiring board, and then reduce the partial discharge of second wiring board department effectively, thereby the utility model provides a current transformer can reduce partial discharge effectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of one direction of a current transformer provided by the present invention;
fig. 2 is a schematic view of another direction of the current transformer provided by the present invention.
In the figure: 100-current transformer, 1-first wiring board, 2-first wiring board, 3-conductive column, 4-secondary coil, 5-second wiring board, 6-second wiring board, 7-casting body, 8-first wiring board shielding layer, 9-second wiring board shielding layer, 10-first wiring board shielding layer, 11-second wiring board shielding layer, 12-mounting base, 13-first grounding inlay, 14-second grounding inlay.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
The utility model aims at providing a current transformer to solve the problem that above-mentioned prior art exists, can reduce partial discharge effectively.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1-2, the utility model provides a current transformer 100, including first wiring board 1, first connecting plate 2, lead electrical pillar 3, secondary coil 4, second connecting plate 5, second wiring board 6, the pouring body 7, first wiring board shielding layer 8 and second wiring board shielding layer 9, first wiring board 1 and second wiring board 6 are all used for fixed locating in one end of pouring body 7, first connecting plate 2, lead electrical pillar 3, secondary coil 4 and second connecting plate 5 are all used for fixed locating in pouring body 7; one end of the first connecting plate 2 is fixedly arranged on the first wiring board 1, the other end of the first connecting plate 2 is fixedly arranged at one end of the conductive column 3, the other end of the conductive column 3 is fixedly connected with one end of the second connecting plate 5, the other end of the second connecting plate 5 is fixedly arranged on the second wiring board 6, and a connecting structure formed by the first wiring board 1, the first connecting plate 2, the conductive column 3, the second connecting plate 5 and the second wiring board 6 can conduct electricity; the secondary coil 4 is fixedly sleeved on the conductive column 3, and a space is reserved between the secondary coil 4 and the conductive column 3 in the radial direction of the conductive column 3; the first wiring board shielding layer 8 is fixedly arranged in the pouring body 7, the first wiring board shielding layer 8 is arranged below the first wiring board 1 and is in contact with the first wiring board 1, and the outer contour of the first wiring board shielding layer 8 is larger than that of the first wiring board 1; the second wiring board shielding layer 9 is used for being fixedly arranged in the pouring body 7, the second wiring board shielding layer 9 is used for being arranged below the second wiring board 6 and being in contact with the second wiring board 6, and the outer contour of the second wiring board shielding layer 9 is larger than that of the second wiring board 6.
The utility model provides a current transformer 100, based on the electrostatic shielding principle, shields the closed angle, burr and the air gap left between first wiring board 1 and pouring body 7 that produce in the course of working on the surface of first wiring board 1 through setting up first wiring board shielding layer 8, improves the electric field distribution of first wiring board 1, and then reduces the partial discharge of first wiring board 1 department effectively; the sharp corners and burrs generated on the surface of the second wiring board 6 in the machining process and the air gaps left between the second wiring board 6 and the casting body 7 are shielded by arranging the second wiring board shielding layer 9, so that the electric field distribution of the second wiring board 6 is improved, and the partial discharge at the second wiring board 6 is effectively reduced, therefore, the current transformer 100 provided by the utility model can effectively reduce the partial discharge; in the present embodiment, the casting 7 is made by casting epoxy resin.
Furthermore, the current transformer 100 provided by the present invention further comprises a first connecting plate shielding layer 10 and a second connecting plate shielding layer 11, wherein the first connecting plate shielding layer 10 and the second connecting plate shielding layer 11 are both used to be fixedly disposed in the casting body 7, the first connecting plate shielding layer 10 is used to cover the end of the first connecting plate 2 away from the first wiring board 1, the first connecting plate shielding layer 10 is used to be disposed at the side of the first connecting plate 2 away from the conductive post 3, the second connecting plate shielding layer 11 is used to cover the end of the second connecting plate 5 away from the second wiring board 6, and the second connecting plate shielding layer 11 is used to be disposed at the side of the second connecting plate 5 away from the conductive post 3, because the first connecting plate 2 and the second connecting plate 5 can cause the shape of the welding position to be irregular when being welded with the conductive post 3, the field intensity of the end part is very likely to be concentrated, and then easily produce partial discharge, through setting up first connecting plate shielding layer 10 and second connecting plate shielding layer 11 and keeping away from the one end of first wiring board 1 and the one end that second wiring board 6 was kept away from to first connecting plate 2 and second connecting plate 5 and carry out the electrostatic shielding, improve first connecting plate 2 and keep away from around the one end of first wiring board 1 and the electric field distribution around the one end that second wiring board 6 was kept away from to second connecting plate 5, and then reduce the partial discharge that first connecting plate 2 kept away from the one end of first wiring board 1 and second connecting plate 5 kept away from the one end of second wiring board 6 effectively, and first connecting plate shielding layer 10 and second connecting plate shielding layer 11 and first wiring board shielding layer 8 and second wiring board shielding layer 9 form an overall shielding system, thereby the utility model provides a current transformer 100 can reduce partial discharge effectively.
Further, the first wiring board shielding layer 8 is made of a first metal mesh, the second wiring board shielding layer 9 is made of a second metal mesh, the first connecting board shielding layer 10 is made of a third metal mesh, and the second connecting board shielding layer 11 is made of a fourth metal mesh.
Further, the current transformer 100 provided by the present invention further includes a mounting base 12, the mounting base 12 is used for being fixedly disposed at one end of the casting body 7 far away from the first wiring board 1, and a first grounding inlay 13 and a second grounding inlay 14 are disposed on the surface of the mounting base 12 near the conductive pillar 3; the one end of keeping away from first wiring board 1 on first connecting plate shielding layer 10 is used for fixed connection on first ground connection inlay 13, the one end of keeping away from second wiring board 6 on second connecting plate shielding layer 11 is used for fixed connection on second ground connection inlay 14, moreover, the steam generator is simple in structure, the preparation and installation are convenient, and as a preferred implementation mode of this embodiment, the quantity of first ground connection inlay 13 and second ground connection inlay 14 all sets up to two, thereby a first ground connection inlay 13 can be for another first ground connection inlay 13 acts as the replacement effect, a second ground connection inlay 14 can act as the replacement effect for another second ground connection inlay 14.
Further, first wiring board shielding layer 8 is used for with first wiring board 1 fixed connection, second wiring board shielding layer 9 is used for with second wiring board 6 fixed connection, can avoid first wiring board shielding layer 8 and second wiring board shielding layer 9 to take place to shift in the pouring process, reduces the pouring degree of difficulty of pouring body 7.
Furthermore, the first wiring board shielding layer 8 is used for being connected with the first wiring board 1 through bolts, and the second wiring board shielding layer 9 is used for being connected with the second wiring board 6 through bolts, so that the first wiring board 1 and the second wiring board 6 can be conveniently detached, installed and maintained.
Further, the secondary coil 4 includes a conducting wire and an annular iron core, the annular iron core is used for being fixedly sleeved on the conductive column 3, and a space is reserved between the annular iron core and the conductive column 3 in the radial direction of the conductive column 3; the wire is used for fixed winding on annular iron core, simple structure, and the preparation is convenient.
The principle and the implementation mode of the utility model are explained by applying a specific embodiment, and the explanation of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. A current transformer, characterized by: the transformer comprises a first wiring board, a first connecting board, a conductive column, a secondary coil, a second connecting board, a second wiring board, a casting body, a first wiring board shielding layer and a second wiring board shielding layer, wherein the first wiring board and the second wiring board are fixedly arranged at one end of the casting body, and the first connecting board, the conductive column, the secondary coil and the second connecting board are fixedly arranged in the casting body; one end of the first connecting plate is used for being fixedly arranged on the first wiring board, the other end of the first connecting plate is used for being fixedly arranged at one end of the conductive column, the other end of the conductive column is used for being fixedly connected with one end of the second connecting plate, the other end of the second connecting plate is used for being fixedly arranged on the second wiring board, and a connecting structure formed by the first wiring board, the first connecting plate, the conductive column, the second connecting plate and the second wiring board can conduct electricity; the secondary coil is fixedly sleeved on the conductive column, and a space is reserved between the secondary coil and the conductive column in the radial direction of the conductive column; the first wiring board shielding layer is used for being fixedly arranged in the casting body, the first wiring board shielding layer is used for being arranged below the first wiring board and being in contact with the first wiring board, and the outer contour of the first wiring board shielding layer is larger than that of the first wiring board; the second wiring board shielding layer is used for being fixedly arranged in the casting body, the second wiring board shielding layer is used for being arranged below the second wiring board and being in contact with the second wiring board, and the outer contour of the second wiring board shielding layer is larger than that of the second wiring board.
2. The current transformer of claim 1, wherein: still include first connecting plate shielding layer and second connecting plate shielding layer, first connecting plate shielding layer with second connecting plate shielding layer all is used for fixed locating in the pouring body, first connecting plate shielding layer is used for the cover to locate first connecting plate is kept away from the one end of first connecting plate, just first connecting plate shielding layer is used for arranging in keeping away from of first connecting plate lead one side of electrical pillar, second connecting plate shielding layer is used for the cover to locate the second connecting plate is kept away from the one end of second connecting plate, just second connecting plate shielding layer is used for arranging in keeping away from of second connecting plate lead one side of electrical pillar.
3. The current transformer of claim 2, wherein: first wiring board shielding layer adopts first metal mesh, second wiring board shielding layer adopts the second metal mesh, first connecting plate shielding layer adopts the third metal mesh, second connecting plate shielding layer adopts the fourth metal mesh.
4. The current transformer of claim 2, wherein: the mounting base is fixedly arranged at one end, far away from the first wiring board, of the pouring body, and a first grounding inlay and a second grounding inlay are arranged on the surface, close to the conductive column, of the mounting base; the one end of keeping away from on the first connecting plate shielding layer first wiring board be used for fixed connection in on the first ground connection inlay, the one end of keeping away from on the second connecting plate shielding layer second wiring board be used for fixed connection in on the second ground connection inlay.
5. The current transformer of claim 4, wherein: the first wiring board shielding layer is used for being fixedly connected with the first wiring board, and the second wiring board shielding layer is used for being fixedly connected with the second wiring board.
6. The current transformer of claim 5, wherein: the first wiring board shielding layer is used for being connected with the first wiring board through bolts, and the second wiring board shielding layer is used for being connected with the second wiring board through bolts.
7. The current transformer of claim 1, wherein: the secondary coil comprises a conducting wire and an annular iron core, the annular iron core is fixedly sleeved on the conducting post, and a space is reserved between the annular iron core and the conducting post in the radial direction of the conducting post; the lead is used for being fixedly wound on the annular iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222780444.4U CN218274231U (en) | 2022-10-21 | 2022-10-21 | Current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222780444.4U CN218274231U (en) | 2022-10-21 | 2022-10-21 | Current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218274231U true CN218274231U (en) | 2023-01-10 |
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ID=84753171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222780444.4U Active CN218274231U (en) | 2022-10-21 | 2022-10-21 | Current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218274231U (en) |
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2022
- 2022-10-21 CN CN202222780444.4U patent/CN218274231U/en active Active
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