CN222233452U - A busbar current transformer with live display function - Google Patents
A busbar current transformer with live display function Download PDFInfo
- Publication number
- CN222233452U CN222233452U CN202421017715.3U CN202421017715U CN222233452U CN 222233452 U CN222233452 U CN 222233452U CN 202421017715 U CN202421017715 U CN 202421017715U CN 222233452 U CN222233452 U CN 222233452U
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- Prior art keywords
- voltage
- secondary winding
- body shell
- current transformer
- capacitor
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- 238000004804 winding Methods 0.000 claims abstract description 41
- 239000003990 capacitor Substances 0.000 claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 239000003985 ceramic capacitor Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
本实用新型公开了一种具有带电显示功能的母线式电流互感器，具体涉及电流互感器技术领域，包括二次绕组、高压电容器、支架和浇注体外壳，浇注体外壳为中心开设有通孔的圆筒形结构，二次绕组、支架和高压电容器均固定于浇注体外壳内部，二次绕组固定在支架上，浇注体外壳的内侧壁固定连接有均压屏蔽网，均压屏蔽网的均压引线用于固定在穿过通孔的母线铜排上，浇注体外壳上设置有互感器二次端子和高压电容器低压端子，二次绕组与互感器二次端子连接，高压电容器的高压端焊接在均压屏蔽网上，高压电容器的低压端与高压电容器低压端子连接。本实用新型同时具有互感器和带电显示功能，信号灵敏稳定，结构紧凑，能够减少开关柜的元件数量。
The utility model discloses a busbar current transformer with a live display function, specifically relates to the technical field of current transformers, including a secondary winding, a high-voltage capacitor, a bracket and a cast body shell, the cast body shell is a cylindrical structure with a through hole in the center, the secondary winding, the bracket and the high-voltage capacitor are all fixed inside the cast body shell, the secondary winding is fixed on the bracket, the inner side wall of the cast body shell is fixedly connected with a voltage-equalizing shielding net, the voltage-equalizing lead of the voltage-equalizing shielding net is used to be fixed on the busbar copper bar passing through the through hole, the cast body shell is provided with a transformer secondary terminal and a high-voltage capacitor low-voltage terminal, the secondary winding is connected to the transformer secondary terminal, the high-voltage end of the high-voltage capacitor is welded on the voltage-equalizing shielding net, and the low-voltage end of the high-voltage capacitor is connected to the low-voltage terminal of the high-voltage capacitor. The utility model has both a transformer and live display functions, a sensitive and stable signal, a compact structure, and can reduce the number of components in a switch cabinet.
Description
Technical Field
The utility model relates to the technical field of current transformers, in particular to a bus type current transformer with an electrified display function.
Background
Along with the development of the power system in China, a 3000-4000A heavy-current central switch cabinet is mainly used as a bus type current transformer for current measurement, electric energy metering and relay protection, a live sensor and a live display are mutually matched, the live sensor is used as a device for monitoring whether equipment runs in a live mode or not, the live sensor is also used as an insulating support of a high-voltage busbar in the switch cabinet, and two main components in the existing switch cabinet are in two different independent product structural forms and are respectively located at different positions according to the structure of the switch cabinet. Along with the miniaturization change trend of the switch cabinet, the space in the switch cabinet is limited, so that the distance between the elements is too small, the discharge phenomenon is easy to occur mutually, and the normal operation of the switch cabinet is influenced.
Disclosure of utility model
The utility model aims to provide a bus type current transformer with an electrified display function, so as to solve the problems of the prior art, and the bus type current transformer has the functions of the transformer and the electrified display, has sensitive and stable signals and a compact structure, and can reduce the number of elements of a switch cabinet.
In order to achieve the above object, the present utility model provides the following solutions:
The utility model provides a bus type current transformer with an electrified display function, which comprises a secondary winding, a high-voltage capacitor, a support and a casting body shell, wherein the casting body shell is of a cylindrical structure with a through hole in the center, the secondary winding, the support and the high-voltage capacitor are all fixed in the casting body shell, the secondary winding is fixed on the support, the inner side wall of the casting body shell is fixedly connected with a voltage-sharing shielding net, a voltage-sharing lead of the voltage-sharing shielding net is used for being fixed on a bus copper bar penetrating through the through hole, a secondary terminal of the transformer and a low-voltage terminal of the high-voltage capacitor are arranged on the casting body shell, the secondary winding is connected with the secondary terminal of the transformer, the high-voltage end of the high-voltage capacitor is welded on the voltage-sharing shielding net, and the low-voltage end of the high-voltage capacitor is connected with the low-voltage terminal of the high-voltage capacitor.
Preferably, the number of the secondary windings is two, and the two secondary windings are respectively and fixedly arranged on two sides of the bracket.
Preferably, the secondary winding comprises an annular iron core, an iron core insulating layer, secondary winding leads and a semiconductive shielding layer, wherein the iron core insulating layer is wound on the outer side of the annular iron core, the secondary winding leads are wound outside the iron core insulating layer, and the semiconductive shielding layer is wound outside the secondary winding leads.
Preferably, the casting shell is made of epoxy resin.
Preferably, the high voltage capacitor is a high voltage ceramic capacitor.
Compared with the prior art, the utility model has the following technical effects:
The utility model provides a bus type current transformer with a live display function, wherein a secondary winding and a high-voltage capacitor are both fixed inside a casting shell, a live sensor and the current transformer are integrated into a whole, meanwhile, the bus type current transformer has the functions of the current transformer and the live display, the number of elements in a switch cabinet can be reduced, the cost is reduced, the space of the switch cabinet is saved, a voltage-sharing shielding net fixedly connected with the inner side wall of the casting shell is connected with a bus copper bar through a voltage-sharing lead, the inner wall of the current transformer and the bus copper bar can be at the same potential, the occurrence of a discharge phenomenon is reduced, the voltage-sharing shielding net can improve the electric field distribution between the voltage-sharing shielding net and the secondary winding, and the partial discharge level is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a bus-type current transformer with an electrified display function according to the present utility model;
Fig. 2 is a front view of a bus-bar type current transformer with an electrified display function according to the present utility model.
The transformer comprises a 1-casting shell, a 2-secondary winding, a 3-bracket, a 4-high-voltage capacitor, a 5-voltage equalizing shielding net, a 6-bus copper bar, a 7-voltage equalizing lead, an 8-fixing bolt, a 9-low-voltage end lead, a 10-secondary winding lead, a 11-high-voltage capacitor low-voltage terminal and a 12-transformer secondary terminal.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a bus type current transformer with an electrified display function, so as to solve the problems of the prior art, and the bus type current transformer has the functions of the transformer and the electrified display, has sensitive and stable signals and a compact structure, and can reduce the number of elements of a switch cabinet.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
The utility model provides a bus-type current transformer with a live display function, which comprises a secondary winding 2, a high-voltage capacitor 4, a support 3 and a casting shell 1, wherein the casting shell 1 is of a cylindrical structure with a through hole in the center, the secondary winding 2, the support 3 and the high-voltage capacitor 4 are all fixed inside the casting shell 1, the secondary winding 2 is fixed on the support 3, the inner side wall of the casting shell 1 is fixedly connected with a voltage-sharing shielding net 5, a voltage-sharing lead 7 of the voltage-sharing shielding net 5 is fixedly connected with a bus copper bar 6 penetrating through the through hole through a fixing bolt 8, the casting shell 1 is provided with a transformer secondary terminal 12 and a high-voltage capacitor low-voltage terminal 11, the secondary winding 2 is connected with the transformer secondary terminal 12 through a secondary winding lead 10, the high-voltage end of the high-voltage capacitor 4 is welded on the voltage-sharing shielding net 5, and the low-voltage end of the high-voltage capacitor 4 is connected with the high-voltage capacitor low-voltage terminal 11 through a low-voltage end lead 9. The secondary winding 2 and the high-voltage capacitor 4 are both fixed inside the casting shell 1, the live sensor and the current transformer are integrated into a whole, the structure is compact, the installation is convenient, meanwhile, the live sensor and the live display function are realized, the number of elements in a switch cabinet can be reduced, the cost is reduced, the space of the switch cabinet is saved, the voltage-sharing shielding net 5 fixedly connected with the inner side wall of the casting shell 1 is connected with the bus copper bar 6 through a voltage-sharing lead wire, the inner wall of the current transformer and the bus copper bar 6 can be at the same potential, the bus copper bar 6 is prevented from discharging on the inner wall of the current transformer, the electric field distribution between the voltage-sharing shielding net and the secondary winding 2 can be improved by the voltage-sharing shielding net 5, and the partial discharge level is reduced.
In the embodiment of the present utility model, it is further preferable that the number of the secondary windings 2 is two, and the two secondary windings 2 are fixedly provided on both sides of the bracket 3, respectively.
It is further preferable in the embodiment of the present utility model that the secondary winding 2 includes a toroidal core, an iron core insulation layer, a secondary winding lead 10 and a semiconductive shield layer, the iron core insulation layer is wound on the outer side of the toroidal core, the secondary winding lead 10 is wound on the outer side of the iron core insulation layer, and the semiconductive shield layer is wound on the outer side of the secondary winding lead 10. The semiconductive shield can improve the electric field distribution and reduce the partial discharge level.
In the embodiment of the present utility model, it is further preferable that the material of the casting shell 1 is epoxy resin.
In the embodiment of the present utility model, it is further preferable that the high-voltage capacitor 4 is a high-voltage ceramic capacitor, and has the characteristics of small size, high withstand voltage, and low loss.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided herein to facilitate understanding of the principles and embodiments of the present utility model and to provide further advantages and practical applications for those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (5)
1. The bus type current transformer with the electrified display function is characterized by comprising a secondary winding, a high-voltage capacitor, a support and a casting body shell, wherein the casting body shell is of a cylindrical structure with a through hole in the center, the secondary winding, the support and the high-voltage capacitor are all fixed inside the casting body shell, the secondary winding is fixed on the support, the inner side wall of the casting body shell is fixedly connected with a voltage-sharing shielding net, a voltage-sharing lead of the voltage-sharing shielding net is used for being fixed on a bus copper bar penetrating through the through hole, a transformer secondary terminal and a high-voltage capacitor low-voltage terminal are arranged on the casting body shell, the secondary winding is connected with the transformer secondary terminal, the high-voltage end of the high-voltage capacitor is welded on the voltage-sharing shielding net, and the low-voltage end of the high-voltage capacitor is connected with the high-voltage capacitor low-voltage terminal.
2. The bus-type current transformer with the live display function according to claim 1, wherein the number of the secondary windings is two, and the two secondary windings are fixedly arranged on two sides of the bracket respectively.
3. The bus-type current transformer with the live display function according to claim 1, wherein the secondary winding comprises an annular iron core, an iron core insulating layer, secondary winding leads and a semiconductive shielding layer, the iron core insulating layer is wound on the outer side of the annular iron core, the secondary winding leads are wound on the outer side of the iron core insulating layer, and the semiconductive shielding layer is wound on the outer side of the secondary winding leads.
4. The bus type current transformer with the live display function according to claim 1, wherein the casting shell is made of epoxy resin.
5. The bus-type current transformer with the live display function according to claim 1, wherein the high-voltage capacitor is a high-voltage ceramic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421017715.3U CN222233452U (en) | 2024-05-11 | 2024-05-11 | A busbar current transformer with live display function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421017715.3U CN222233452U (en) | 2024-05-11 | 2024-05-11 | A busbar current transformer with live display function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222233452U true CN222233452U (en) | 2024-12-24 |
Family
ID=93913065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421017715.3U Active CN222233452U (en) | 2024-05-11 | 2024-05-11 | A busbar current transformer with live display function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222233452U (en) |
-
2024
- 2024-05-11 CN CN202421017715.3U patent/CN222233452U/en active Active
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