CN216818082U - Anti-vibration current transformer with variable transformation ratio - Google Patents
Anti-vibration current transformer with variable transformation ratio Download PDFInfo
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- CN216818082U CN216818082U CN202122462069.4U CN202122462069U CN216818082U CN 216818082 U CN216818082 U CN 216818082U CN 202122462069 U CN202122462069 U CN 202122462069U CN 216818082 U CN216818082 U CN 216818082U
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Abstract
The utility model relates to a current transformer, and provides an anti-vibration current transformer with a variable transformation ratio for a ring main unit and an air main unit of a power system of 35kV or below. The transformer comprises a shell, a common coil and a conversion coil, wherein two ends of a primary coil of the conversion coil are correspondingly connected with two ends of a secondary output coil of the common coil; and two ends and a middle tap of a secondary output coil of the conversion coil extend to the top of the shell and are correspondingly connected with a secondary socket at the top of the shell. The volume of the mutual inductor is reduced, and the product percent of pass is improved. The times of updating and upgrading are reduced, and the service life of the product is prolonged.
Description
Technical Field
The utility model relates to a current transformer, in particular to an anti-vibration current transformer with a variable transformation ratio for a ring main unit and an air cabinet of a power system of 35kV or below.
Background
The current transformer is a device for monitoring primary large current, and sometimes a multiple ratio is needed to monitor the operation condition of a power grid in order to widen the measuring range or the protection range. The conventional product large transformation ratio 1A current transformer is large in size, multiple in turns, low in qualification rate of the conventional manufacturing process, capable of causing rejection accidents such as turn-to-turn short circuit voltage-resistant breakdown and the like of the product frequently, and the conventional product is not required to be in an appointed shape, and cannot meet requirements in a conventional installation mode according to vibration resistance requirements of customers. How to produce a mutual inductor with smaller volume, lighter weight, higher qualification rate, more convenient operation and simpler structure becomes the problem which needs to be solved urgently in the industry.
Disclosure of Invention
In order to overcome the defects of large volume, no vibration resistance and the like of the conventional current transformer, the utility model aims to provide a vibration-resistant current transformer with a variable transformation ratio.
In order to achieve the purpose, the utility model adopts the technical scheme that:
an anti-vibration current transformer with a variable transformation ratio comprises a shell, a shared coil and a conversion coil, wherein two ends of a primary coil of the conversion coil are correspondingly connected with two ends of a secondary output coil of the shared coil; and two ends and a middle tap of a secondary output coil of the conversion coil extend to the top of the shell and are correspondingly connected with a secondary socket at the top of the shell.
Furthermore, the secondary socket is connected with a secondary terminal, two ends and a middle tap of the conversion coil are connected with corresponding terminals, and the terminals are sealed in high-temperature-resistant resin.
Furthermore, the outside parcel of nonrust steel pipe has the silica gel cover, and the top of nonrust steel pipe is connected with fore-and-aft mounting panel, two fore-and-aft nonrust steel pipes are connected to the mounting panel, are equipped with the installation screw coaxial with nonrust steel pipe on the mounting panel.
Further, the top of the secondary socket is covered with a transparent cover, and the transparent cover is fixedly installed on the top of the shell through screws.
After the technical scheme is adopted, the utility model has the beneficial effects that: the manufacturing cost is reduced, the size of the transformer is reduced, and the product percent of pass is improved by sharing one iron core and one conversion coil. The times of updating and upgrading are reduced, and the service life of the product is prolonged. The product installation part adopts whole buffer structure, changes the mode of traditional footing installation, uses four nonrust steel pipe four-point fixed mounting means, lets the installation more reliable firm. The utility model is suitable for the measurement and protection of the multi-transformation ratio current device for the medium and low voltage ring main unit and the air cabinet, and is also suitable for being installed in the motor assembly with special requirements on the use environment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
fig. 3 is a schematic diagram of the present invention.
Detailed Description
The following detailed description of embodiments of the utility model is provided in conjunction with the accompanying drawings:
as shown in the figure, the anti-vibration current transformer with the variable transformation ratio comprises a cuboid shell 1 with an open top, a shared coil 2, a conversion coil 3, four stainless steel pipes 4, a secondary socket 5 and a transparent cover 6, wherein the shared coil 2, the conversion coil 3 and the four stainless steel pipes are installed in the shell 1, and the secondary socket 5 and the transparent cover are installed on the top surface of the shell. The common coil 2 is installed at the middle upper portion in the housing 1, and the conversion coil 3 is installed at the lower portion of the housing 1. The common coil 2 adopts a silicon steel sheet iron core, is a single transformation ratio 5A coil, and the conversion coil 4 adopts a high-permeability iron core. Two ends of the primary coil of the conversion coil 3 are correspondingly connected with two ends of the secondary output coil of the common coil 2. The secondary coil of the conversion coil 3 is wound by tapping, a middle tapping winding is adopted in the technical scheme, namely the secondary coil of the conversion coil comprises three outgoing lines of a head joint 31, a middle tapping 32 and a tail joint 33, three secondary sockets 5 are arranged at the top of the shell 1, and three outgoing lines of the secondary coil 7 of the conversion coil 3 are respectively connected with the corresponding secondary sockets 5 through secondary terminals 8. And the current of the corresponding coil can be output or measured by connecting any two secondary interfaces. The case 1 is filled with a high-temperature resistant resin, and the common coil 2, the conversion coil 3, the four stainless pipes 4, the secondary terminal 8, and the secondary inlet 5 are fixed and protected. The transparent cover 6 covers the outside of the secondary jack 5 and is fixed by screws.
Four vertical stainless steel pipes 4 are distributed at four corners of the inner side of the shell 1, silica gel pads are mounted on the bottom surfaces and the top surfaces of the stainless steel pipes 4, silica gel sleeves 9 are fixedly sleeved on the outer sides of the stainless steel pipes 4, the bottom surfaces of the stainless steel pipes 4 are connected with a bottom plate of the shell, mounting plates 10 are mounted at the tops of the two longitudinal stainless steel pipes 4, and threaded holes 11 which are coaxial with the stainless steel pipes are processed in the mounting plates 10. After the housing 1 is filled with high temperature resistant resin, the stainless steel tube 4 and the housing form a whole, and the housing can be installed and fixed through four threaded holes on the two installation plates 10. The stainless steel tube 4 provides support and cushioning.
Claims (4)
1. An anti-vibration current transformer with a changeable transformation ratio comprises a shell, a shared coil and a transformation coil, wherein two ends of a primary coil of the transformation coil are correspondingly connected with two ends of a secondary output coil of the shared coil; and two ends and a middle tap of a secondary output coil of the conversion coil extend to the top of the shell and are correspondingly connected with a secondary socket at the top of the shell.
2. The transformation ratio-changeable anti-vibration current transformer according to claim 1, wherein the secondary socket is connected with secondary terminals, two ends and a middle tap of the transformation coil are connected with corresponding terminals, and the terminals are sealed in high temperature resistant resin.
3. The transformation ratio-changeable anti-vibration current transformer according to claim 1, wherein the outer side of the stainless steel tube is wrapped with a silica gel sleeve, the top of the stainless steel tube is connected with a longitudinal mounting plate, the mounting plate is connected with two longitudinal stainless steel tubes, and the mounting plate is provided with mounting screw holes coaxial with the stainless steel tubes.
4. The transformation ratio changeable anti-vibration current transformer according to claim 1, wherein a transparent cover is covered on the top of the secondary socket, and the transparent cover is fixedly installed on the top of the shell through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122462069.4U CN216818082U (en) | 2021-10-13 | 2021-10-13 | Anti-vibration current transformer with variable transformation ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122462069.4U CN216818082U (en) | 2021-10-13 | 2021-10-13 | Anti-vibration current transformer with variable transformation ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216818082U true CN216818082U (en) | 2022-06-24 |
Family
ID=82040045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122462069.4U Active CN216818082U (en) | 2021-10-13 | 2021-10-13 | Anti-vibration current transformer with variable transformation ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216818082U (en) |
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2021
- 2021-10-13 CN CN202122462069.4U patent/CN216818082U/en active Active
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