CN210429534U - Current transformer and solid cabinet - Google Patents
Current transformer and solid cabinet Download PDFInfo
- Publication number
- CN210429534U CN210429534U CN201920429077.9U CN201920429077U CN210429534U CN 210429534 U CN210429534 U CN 210429534U CN 201920429077 U CN201920429077 U CN 201920429077U CN 210429534 U CN210429534 U CN 210429534U
- Authority
- CN
- China
- Prior art keywords
- transformer
- current transformer
- outer insulating
- cabinet
- equipotential
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses a current transformer and solid cabinet. Wherein, current transformer includes: the transformer iron core is positioned in the equipotential shielding cover of the transformer body; the transformer body equipotential shielding cover is connected with the transformer iron core through a connecting wire; the equipotential shielding cover of the transformer body is positioned inside the thermoplastic outer insulating shell; the thermoplastic outer insulating housing has a connection port, wherein the current transformer is connected to the solid cabinet through the connection port. The utility model provides a current transformer's the poor technical problem of electrical property stability.
Description
Technical Field
The utility model relates to an electrical detection technical field particularly, relates to a current transformer and solid cabinet.
Background
Along with the construction of smart power grids, the standardization, integration and intelligence degrees of primary and secondary power distribution equipment are higher and higher, and in urban and rural power grid transformation, high voltage directly goes deep into a load center, so that the using amount of a solid ring main unit is greatly increased. The mutual inductor which is an important component of the solid ring main unit fully embodies the characteristics and requirements of high performance, modularization, safety, reliability, deep integration and high efficiency, and the current mutual inductor, the voltage mutual inductor, the electronic mutual inductor and the like special for the solid ring main unit, which are made of green environment-friendly insulating materials with excellent performance, are produced accordingly. At present, the manufacturing method of the current transformer for the solid ring main unit mainly comprises the following steps:
1. the current transformer body is encapsulated by insulating crepe paper, a glass fiber cloth belt and polyester film composite paper, an inner insulator body is manufactured after insulating paint is soaked, and an insulating adhesive tape is encapsulated outside the inner insulator body;
2. adopting a mode of vacuum casting and encapsulating the body of the current transformer by using epoxy resin;
3. the transformer body is placed in the insulating shell and then is encapsulated with polyurethane material.
Although the three modes can solve the problems of use of the current transformer for the solid ring main unit and assembly of the current transformer with the switch, the existing current transformer does not take low partial discharge treatment measures, and after the current transformer is assembled with the on-column circuit breaker, the overall partial discharge capacity of the on-column circuit breaker can exceed the standard. In addition, after the current transformer encapsulated by the insulating material after being dipped in paint runs for a period of time, the insulating material of the product is possibly loosened due to vibration, so that the electrical performance of the product is reduced, the insulating strength is reduced, and even insulation breakdown occurs.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the utility model provides a current transformer and solid cabinet to solve current transformer's the poor technical problem of electrical property stability at least.
According to an aspect of the embodiment of the utility model provides a current transformer is provided, include: the transformer iron core is positioned in the equipotential shielding cover of the transformer body; the transformer body equipotential shielding cover is connected with the transformer iron core through a connecting wire; the equipotential shielding cover of the transformer body is positioned inside the thermoplastic outer insulating shell; the thermoplastic outer insulating housing has a connection port, wherein the current transformer is connected to the solid cabinet through the connection port.
Further, the current transformer further includes: and the secondary winding is wound on the transformer iron core, wherein the transformer iron core wound by the secondary winding is positioned in the equipotential shielding case of the transformer body.
Further, the thermoplastic outer insulating shell and the equipotential shield cover of the transformer body are encapsulated by the first insulating material.
Further, the first insulating material is epoxy resin.
Further, the inner surface of the thermoplastic outer insulating shell is attached with a semiconductor material.
Further, the material of the thermoplastic outer insulating shell is thermoplastic plastics, and the thermoplastic plastics comprise at least one of the following materials: polyethylene, polyvinyl chloride, polypropylene, polystyrene, acrylonitrile-butadiene-styrene.
Further, the current transformer further includes: and the inner side of the wire through hole is provided with a shielding uniform field ring.
Further, the shielding uniform field ring is made of a semiconductor material or a conductor material.
According to the utility model discloses on the other hand, still provide a solid cabinet, including foretell current transformer, wherein, solid cabinet still includes fixed cabinet casing.
Further, the solid cabinet is a solid ring main unit.
The embodiment of the utility model provides an in, adopt thermoplastic material as the shell material of mutual-inductor outer insulating housing, through placing the mutual-inductor iron core in ware body equipotential shield cover to make ware body equipotential shield cover be connected with the mutual-inductor iron core through the connecting wire, and ware body equipotential shield cover is located inside the thermoplastic outer insulating housing, and wherein, thermoplastic outer insulating housing has connection port, and current transformer passes through connection port and is connected with cabinet body cabinet.
Therefore, the transformer core and the equipotential shield cover of the current transformer are effectively connected to form an equipotential semiconductor whole body, the thermoplastic outer insulating shell of the current transformer is provided with the connecting port which is reliably connected with the metal body inside the ring main unit body, and the problem of whole partial discharge of the ring main unit is solved. In addition, the current transformer provided by the application adopts thermoplastic plastics to make the insulating shell as the insulating shaping mould of current transformer, and the technology simple manufacture, insulating thickness is unanimous, and the stable performance is reliable, has improved the stability of current transformer's electrical property.
From the above, the technical problem that the electrical performance stability of the existing current transformer is poor is solved by the scheme provided by the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic structural diagram of a current transformer according to an embodiment of the present invention;
fig. 2 is an expanded schematic view of a housing of an alternative current transformer in accordance with an embodiment of the present invention; and
fig. 3 is a schematic diagram of a housing of an alternative sensor group according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below 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 shall belong to the protection scope of the present invention.
According to the embodiment of the utility model provides an embodiment of current transformer is provided, wherein, fig. 1 is according to the utility model discloses current transformer's structural schematic diagram, as shown in fig. 1, this current transformer includes: the transformer comprises a transformer iron core 2, a transformer body equipotential shielding case 5 and a thermoplastic outer insulating shell 4.
The transformer comprises a transformer iron core 2, wherein the transformer iron core is positioned in an equipotential shielding case of a transformer body; the transformer body equipotential shielding case 5 is connected with the transformer iron core through a connecting wire; a thermoplastic outer insulating shell 4, wherein the equipotential shield of the transformer body is positioned inside the thermoplastic outer insulating shell; the thermoplastic outer insulating housing has a connection port, wherein the current transformer is connected to the solid cabinet through the connection port.
It should be noted that, according to different applications, accuracy grades and rated transformation ratios of products, transformer cores made of different materials can be adopted, wherein the material of the transformer core includes at least one of the following materials: cold rolled silicon steel strip, amorphous alloy, permalloy. In addition, the end face of the transformer iron core is subjected to epoxy curing, paint dipping and round corner guiding treatment so as to prevent the transformer iron core from being corroded. Optionally, fig. 2 is an expanded schematic view of a housing of the current transformer, wherein a connection port 8 in a thermoplastic outer insulating housing of the current transformer is used for connecting the current transformer and a device of the solid ring main unit for signal acquisition.
Based on the above, the thermoplastic material is adopted as the shell material of the outer insulating shell of the transformer, the transformer core is placed in the body equipotential shield cover, and the body equipotential shield cover is connected with the transformer core through the connecting wire, and the body equipotential shield cover is located inside the thermoplastic outer insulating shell, wherein the thermoplastic outer insulating shell has a connecting port, and the current transformer is connected with the solid cabinet through the connecting port.
It is noted easily that the mutual inductor iron core and the ware body equipotential shield cover of the current transformer that this application provided are effective to be connected and form the equipotential semiconductor wholly, and the thermoplastic outer insulation casing of current transformer leaves the connection port of reliably being connected with the inside metal body of looped netowrk cabinet body, has solved the whole partial discharge problem of looped netowrk cabinet. In addition, the current transformer provided by the application adopts thermoplastic plastics to make the insulating shell as the insulating shaping mould of current transformer, and the technology simple manufacture, insulating thickness is unanimous, and the stable performance is reliable, has improved the stability of current transformer's electrical property.
Therefore, the technical problem that the electrical performance stability of the existing current transformer is poor is solved by the scheme provided by the application.
In an alternative, as shown in fig. 1, the current transformer further includes: and a secondary winding 3. The secondary winding 3 is wound on the transformer iron core, and the transformer iron core wound by the secondary winding is positioned in the equipotential shielding cover of the transformer body. Specifically, the secondary winding is uniformly wound on a transformer iron core, the wound transformer iron core is placed in the equipotential shield cover of the transformer body, and the wound transformer iron core is connected with the equipotential shield cover of the transformer body through a connecting wire.
In an alternative scheme, the thermoplastic outer insulating shell and the equipotential shield of the transformer body are encapsulated by a first insulating material 1, and the transformer core is fixed by the first insulating material, wherein the first insulating material is epoxy resin. Optionally, a space between the equipotential shield of the body and the thermoplastic outer insulating shell is a: and (3) vacuum encapsulating the epoxy resin of the component B to form the epoxy resin inner insulator.
The thermoplastic outer insulating shell is made of thermoplastic plastics, and a semiconductor material is attached to the inner surface of the thermoplastic outer insulating shell to form a shielding uniform field layer. Wherein the thermoplastic comprises at least one of: polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), Polystyrene (PS), and Acrylonitrile Butadiene Styrene (ABS).
In an optional aspect, the current transformer further comprises: and the inner side of the wire passing hole is provided with a shielding uniform field ring which is made of a semiconductor material or a conductor material. Optionally, the equipotential shielding cover of the body and the sleeve shielding field equalizing layer may adopt conductive rubber, a copper mesh, an aluminum mesh, semiconductor crepe paper, and the like.
It should be noted that the breaker high voltage bushing may pass through the wire passing hole. In the process of manufacturing the thermoplastic outer insulating shell of the current transformer, the shielding field equalizing ring can be clamped and fused in the wire through hole.
In an alternative arrangement, a plurality of current sensors may form a sensor group, fig. 3 shows a schematic diagram of a housing of an alternative sensor group, and as can be seen from fig. 3, the housing of the sensor group has a plurality of wire through holes 7 corresponding to the wire through holes of the sensors. In addition, the shell of the sensor group is also provided with a plurality of fixing positioning holes 6 for fixing the current transformer.
According to the utility model discloses on the other hand, still provide a solid cabinet, including foretell current transformer, wherein, solid cabinet still includes the solid cabinet casing, and the solid cabinet casing has at least one fixed orifices. Optionally, the solid cabinet is a solid ring main unit.
According to the method, the thermoplastic plastic and the epoxy resin are compounded and insulated to serve as the main insulating material of the current transformer, and the current transformer is subjected to low partial discharge treatment, so that the problem of overall partial discharge of the solid ring main unit is solved, and the stability of the electrical performance of the solid ring main unit is improved. In addition, the insulating shell made of thermoplastic plastics is used as an insulating shaping die of the current transformer, the process is simple to manufacture, the insulating thickness is consistent, the performance is stable and reliable, the production period of the current transformer is shortened, the energy consumption is reduced, and the low-carbon and environment-friendly effects are achieved.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A current transformer, comprising:
the transformer iron core is positioned in the equipotential shielding cover of the transformer body;
the transformer body equipotential shielding cover is connected with the transformer iron core through a connecting wire;
a thermoplastic outer insulating shell, wherein the body equipotential shield is located inside the thermoplastic outer insulating shell;
the thermoplastic outer insulating shell has a connection port through which a current transformer is connected with the cabinet.
2. The current transformer of claim 1, further comprising:
and the secondary winding is wound on the transformer iron core, wherein the transformer iron core wound by the secondary winding is positioned in the equipotential shielding case of the transformer body.
3. The current transformer of claim 1, wherein the thermoplastic outer insulating shell is potted with a first insulating material between the equipotential shield of the body.
4. The current transformer of claim 3, wherein the first insulating material is an epoxy.
5. The current transformer of claim 1, wherein the thermoplastic outer insulating housing has a semiconducting material affixed to an inner surface thereof.
6. The current transformer of claim 5, wherein the thermoplastic outer insulating housing material is a thermoplastic comprising at least one of: polyethylene, polyvinyl chloride, polypropylene, polystyrene, acrylonitrile-butadiene-styrene.
7. The current transformer of claim 1, further comprising:
and the inner side of the wire passing hole is provided with a shielding uniform field ring.
8. The current transformer of claim 7, wherein the shielded shimming ring is a semiconductor material or a conductor material.
9. A solid state cabinet comprising the current transformer of any one of claims 1 to 8, wherein the solid state cabinet further comprises a solid state cabinet housing having at least one securing aperture.
10. The cabinet of claim 9, wherein the cabinet is a fixed ring main unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920429077.9U CN210429534U (en) | 2019-04-01 | 2019-04-01 | Current transformer and solid cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920429077.9U CN210429534U (en) | 2019-04-01 | 2019-04-01 | Current transformer and solid cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210429534U true CN210429534U (en) | 2020-04-28 |
Family
ID=70361208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920429077.9U Active CN210429534U (en) | 2019-04-01 | 2019-04-01 | Current transformer and solid cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210429534U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU213135U1 (en) * | 2022-05-11 | 2022-08-26 | Открытое акционерное общество "Объединенные электротехнические заводы" | signal transformer |
-
2019
- 2019-04-01 CN CN201920429077.9U patent/CN210429534U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU213135U1 (en) * | 2022-05-11 | 2022-08-26 | Открытое акционерное общество "Объединенные электротехнические заводы" | signal transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201518349U (en) | Waterproof low-frequency antenna | |
| CN104575947A (en) | Inductor and manufacturing method thereof | |
| CN210429534U (en) | Current transformer and solid cabinet | |
| CN205384921U (en) | Inductance coil structure | |
| CN105575642A (en) | Three-phase integrated voltage transformer internally provided with resistors | |
| CN209979723U (en) | Current transformer and pole-mounted switch | |
| CN108987071B (en) | Transformer and preparation method thereof | |
| CN209980966U (en) | Current transformer and pole-mounted switch | |
| CN106526274A (en) | Electronic current and voltage combined mutual inductor | |
| Xia et al. | Evaluation of permanent magnet distribution schemes for toroid power inductor with increased saturation current using 3D physical models | |
| CN209962868U (en) | Current transformer | |
| CN202870144U (en) | Current measuring device for breaker or switch cabinet | |
| CN103680811B (en) | A kind of magnetization cable wire method of magnetic flux transducer | |
| CN201749778U (en) | Current transformer | |
| CN206574605U (en) | Electrolytic capacitor and its capacitor core | |
| CN206422012U (en) | A kind of electricity-fetching mechanism of electric accessories | |
| CN210896931U (en) | Isosceles trapezoid wireless charging receiving coil module | |
| CN207009283U (en) | The current transformer of diamagnetic field force interference | |
| CN202093946U (en) | Transformer core component and transformer manufactured by using same | |
| CN106526275A (en) | Electronic current and voltage combined transformer | |
| CN204144035U (en) | A kind of high frequency transformer | |
| CN207282272U (en) | A kind of multiple layer metal coil inductor | |
| CN206532659U (en) | A kind of stable magnet coil of performance | |
| CN204144033U (en) | A kind of high frequency transformer | |
| CN205104356U (en) | Current inducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210122 Address after: 125000 north of Changcheng Road, dongdaihe New District, Huludao City, Liaoning Province Patentee after: Micro energy Huitong (Liaoning) Power Technology Co.,Ltd. Address before: 102206 3032, building 6, No. 97, Changping Road, Shahe Town, Changping District, Beijing Patentee before: BEIJING MICROPOWER TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |