CN211122995U - Zero sequence transformer with resistance to compression ceramic capacitor chip - Google Patents
Zero sequence transformer with resistance to compression ceramic capacitor chip Download PDFInfo
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- CN211122995U CN211122995U CN201922020278.6U CN201922020278U CN211122995U CN 211122995 U CN211122995 U CN 211122995U CN 201922020278 U CN201922020278 U CN 201922020278U CN 211122995 U CN211122995 U CN 211122995U
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- sequence transformer
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Abstract
The utility model relates to a zero sequence transformer with resistance to compression ceramic capacitor chip. The device comprises a shell, wherein a main capacitor and an auxiliary capacitor which are connected in series are arranged in the shell, one end of the shell is provided with two high-voltage interfaces, a measuring interface and a ground wire interface, the input end of the main capacitor is respectively connected with the two high-voltage interfaces through a conducting wire, a conducting post is arranged between the main capacitor and the auxiliary capacitor, the measuring interface is connected with the conducting post through a conducting wire, and the output end of the auxiliary capacitor is connected with the ground wire interface through a conducting wire; the main capacitor comprises a compression-resistant ceramic capacitor chip, the compression-resistant ceramic capacitor chip comprises a cylindrical ceramic body, a concave hole matched with the conductive column is formed in the middle of the end face, close to the capacitor, of the ceramic body, and silver electrodes are arranged in the middle of the two end faces of the ceramic body. The structure of the main capacitor is adjusted, and the distance of a punctured air line is increased by arranging a concave hole at the lower end; therefore, the voltage resistance of the main capacitor is improved, the miniaturization of the main capacitor and the miniaturization of the zero sequence transformer are facilitated, and the cost is reduced.
Description
Technical Field
The utility model relates to a zero sequence transformer technical field especially relates to a zero sequence transformer with resistance to compression ceramic capacitor chip.
Background
The zero sequence transformer is widely applied to a small current grounding line washing device, generates zero sequence grounding current in an electric power system, is matched with a relay protection device or other signal switching devices for use, controls the action of the switching devices and protects circuits; the method specifically comprises the following steps: when a fault occurs in a line and the voltage is unstable, the current output by the mutual inductor deviates a normal value greatly, so that the switching device acts as a protection action. The existing zero sequence transformer adopts a capacitance voltage division structure, and in order to reduce cost, 2 capacitors are generally adopted for voltage division, so that the voltage difference between the two capacitors is large, the volume of the capacitor bearing large voltage is large, and a large installation volume needs to be designed during manufacturing; therefore, a capacitor which can bear a large voltage and has a small volume needs to be designed to reduce the volume and the manufacturing cost of the zero sequence transformer.
Disclosure of Invention
An object of the utility model is to solve prior art's not enough, provide a zero sequence transformer with resistance to compression and small ceramic capacitor chip.
A zero sequence transformer with a compression-resistant ceramic capacitor chip comprises a shell, wherein a main capacitor and an auxiliary capacitor which are connected in series are arranged in the shell, one end of the shell is provided with two high-voltage interfaces, a measuring interface and a ground wire interface, the input end of the main capacitor is respectively connected with the two high-voltage interfaces through a conducting wire, a conducting post is arranged between the main capacitor and the auxiliary capacitor, the measuring interface is connected with the conducting post through a conducting wire, and the output end of the auxiliary capacitor is connected with the ground wire interface through a conducting wire; the main capacitor comprises a compression-resistant ceramic capacitor chip, the compression-resistant ceramic capacitor chip comprises a cylindrical ceramic body, a concave hole matched with the conductive column is formed in the middle of the end face, close to the end face of the capacitor, of the ceramic body, and silver electrodes are arranged in the middle of the two end faces of the ceramic body.
Furthermore, a plurality of convex rings are arranged on the side surface of the ceramic body.
Furthermore, the bottom of the shell is provided with a plurality of connecting holes.
Furthermore, the conductive column is a copper column, and two ends of the copper column are respectively connected with the electrodes of the main capacitor and the auxiliary capacitor through soldering tin.
Further, an annular side wall is formed on the outer side of the concave hole, at least one inner annular bump is arranged on the annular side wall, and the conductive column is provided with an annular groove matched with the inner annular bump.
The utility model has the advantages that: the structure of the main capacitor is adjusted, and the distance of a punctured air line is increased by arranging a concave hole at the lower end; therefore, the voltage resistance of the main capacitor is improved, the miniaturization of the main capacitor and the miniaturization of the zero sequence transformer are facilitated, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of a cross-sectional structure of the present invention.
Fig. 3 is a schematic cross-sectional view of a main capacitor.
Fig. 4 is a second cross-sectional view of the main capacitor.
Fig. 5 is a third schematic cross-sectional view of the main capacitor.
Description of reference numerals:
1-a housing; 2-high voltage interface; 3-measurement interface; 4-ground wire interface; 5-main capacitor; 6-conductive column; 7-slave capacitance; 8-connecting hole; 51-silver electrode; 52-a ceramic body; 53-annular sidewall; 54-concave hole; 55-convex ring; 56-inner annular projection.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Example (b): see fig. 1-5.
A zero sequence transformer with a compression-resistant ceramic capacitor chip comprises a shell 1, wherein a main capacitor 5 and an auxiliary capacitor 7 which are connected in series are arranged in the shell 1, one end of the shell 1 is provided with two high-voltage interfaces 2, a measuring interface 3 and a ground wire interface 4, the input end of the main capacitor 5 is respectively connected with the two high-voltage interfaces 2 through a conducting wire, a conducting post 6 is arranged between the main capacitor 5 and the auxiliary capacitor 7, the measuring interface 3 is connected with the conducting post 6 through a conducting wire, and the output end of the auxiliary capacitor 7 is connected with the ground wire interface 4 through a conducting wire; the main capacitor 5 comprises a compression-resistant ceramic capacitor chip, the compression-resistant ceramic capacitor chip comprises a cylindrical ceramic body 52, a concave hole 54 matched with the conductive column 6 is formed in the middle of the end face, close to the slave capacitor 7, of the ceramic body 52, and silver electrodes 51 are arranged in the middle of the two end faces of the ceramic body 52.
The zero sequence transformer adopts a structure that a main capacitor 5 and an auxiliary capacitor 7 are connected in series for voltage division, wherein one high-voltage interface 2 is connected with one of three input phase lines; the other high-voltage interface 2 is used for connecting a sensor; the measuring interface 3 is connected with the conductive column 6 to externally send the potential information of the conductive column 6; the main capacitor 5 and the auxiliary capacitor 7 divide the phase voltage, wherein the main capacitor 5 bears high voltage; the high voltage resistance of the capacitor is related to the material and the shape of the capacitor, the voltage resistance of the capacitor is improved mainly by improving the shape of the capacitor on the premise of the material, and the capacitor is broken down mainly by 1 and the material of the capacitor; 2. air breakdown of the edge; because the capacitor is made of ceramic generally, the possibility of self material breakdown is low and the possibility of air breakdown is high under normal volume; the air breakdown is generally related to the conductivity of air and the length of the air line at two breakdown points, and the housing 1 is generally in a relatively sealed state, so that the conductivity of air is not greatly changed, and the air line can be added to improve the pressure resistance of the housing. The main capacitor 5 in this technical scheme sets up shrinkage pool 54 through the terminal surface middle part with one side, and the silver electrode 51 of this end sets up in this shrinkage pool 54 middle part, and the air route between the silver electrode 51 at both ends has been increased to can its resistance to pressure of effectual improvement. Next, the conductive post 6 is matched with the concave hole 54, so as to increase the matching and contact area between the conductive post 6 and the ceramic body 52.
Further, the side surface of the ceramic body 52 is provided with a plurality of convex rings 55.
The convex ring 55 is arranged for increasing the distance of an air route, increasing the distance of air breakdown and improving the pressure resistance.
Further, the bottom of the shell 1 is provided with a plurality of connecting holes 8.
In the using process, the zero sequence transformer is generally fixed on a metal substrate, and in order to facilitate fixing, a plurality of connecting holes 8 are formed in the bottom of the shell 1 and are fixed through bolts.
Furthermore, the conductive column 6 is a copper column, and two ends of the copper column are respectively connected with the electrodes of the main capacitor 5 and the auxiliary capacitor 7 through soldering tin.
The copper column has high conductivity, reduces the attenuation of the potential on the copper column, and reduces or avoids the partial pressure of the potential.
Further, an annular side wall 53 is formed on the outer side of the concave hole 54, the annular side wall 53 is provided with at least one inner annular bump 56, and the conductive column 6 is provided with an annular groove matched with the inner annular bump 56.
The provision of the inner annular projection 56 further increases the air routing; and secondly, the conductive posts 6 are matched for assisting in fixing and positioning the conductive posts 6.
Having described the invention in detail, it will be apparent to those skilled in the art that modifications and equivalents may be made to the disclosed embodiments without departing from the spirit and scope of the disclosed embodiments.
Claims (5)
1. A zero sequence transformer with a compression-resistant ceramic capacitor chip comprises a shell, wherein a main capacitor and an auxiliary capacitor which are connected in series are arranged in the shell, one end of the shell is provided with two high-voltage interfaces, a measuring interface and a ground wire interface, the input end of the main capacitor is respectively connected with the two high-voltage interfaces through a conducting wire, a conducting post is arranged between the main capacitor and the auxiliary capacitor, the measuring interface is connected with the conducting post through a conducting wire, and the output end of the auxiliary capacitor is connected with the ground wire interface through a conducting wire; the method is characterized in that: the main capacitor comprises a compression-resistant ceramic capacitor chip, the compression-resistant ceramic capacitor chip comprises a cylindrical ceramic body, a concave hole matched with the conductive column is formed in the middle of the end face, close to the end face of the capacitor, of the ceramic body, and silver electrodes are arranged in the middle of the two end faces of the ceramic body.
2. The zero sequence transformer with the pressure-resistant ceramic capacitor chip as claimed in claim 1, wherein: the side of the ceramic body is provided with a plurality of convex rings.
3. The zero sequence transformer with the pressure-resistant ceramic capacitor chip as claimed in claim 1, wherein: the bottom of the shell is provided with a plurality of connecting holes.
4. The zero sequence transformer with the pressure-resistant ceramic capacitor chip as claimed in claim 1, wherein: the conductive column is a copper column, and two ends of the copper column are respectively connected with the electrodes of the main capacitor and the auxiliary capacitor through soldering tin.
5. The zero sequence transformer with the pressure-resistant ceramic capacitor chip as claimed in claim 1, 2, 3 or 4, wherein: the outside of shrinkage pool forms annular side wall, annular side wall is equipped with at least one interior annular lug, it is equipped with the annular groove with interior annular lug matched with to lead electrical pillar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922020278.6U CN211122995U (en) | 2019-11-21 | 2019-11-21 | Zero sequence transformer with resistance to compression ceramic capacitor chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922020278.6U CN211122995U (en) | 2019-11-21 | 2019-11-21 | Zero sequence transformer with resistance to compression ceramic capacitor chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211122995U true CN211122995U (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922020278.6U Active CN211122995U (en) | 2019-11-21 | 2019-11-21 | Zero sequence transformer with resistance to compression ceramic capacitor chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211122995U (en) |
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2019
- 2019-11-21 CN CN201922020278.6U patent/CN211122995U/en active Active
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