CN221125703U - Voltage equalizing device for improving partial discharge of voltage transformer - Google Patents
Voltage equalizing device for improving partial discharge of voltage transformer Download PDFInfo
- Publication number
- CN221125703U CN221125703U CN202322629003.9U CN202322629003U CN221125703U CN 221125703 U CN221125703 U CN 221125703U CN 202322629003 U CN202322629003 U CN 202322629003U CN 221125703 U CN221125703 U CN 221125703U
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- Prior art keywords
- voltage
- equalizing cover
- partial discharge
- cover
- shielding net
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims description 10
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Abstract
The utility model provides a voltage equalizing device for improving partial discharge of a voltage transformer, wherein a voltage equalizing cover is added at the joint of an insulating choke plug and a high-voltage shielding net, the voltage equalizing cover is connected with one end of a metal nut, the other end of the metal nut is contacted with the high-voltage shielding net to form a passage, the range of the voltage equalizing cover 1 covering the insulating choke plug 4 is 15-20mm away from the joint, the insulating choke plug, the voltage equalizing cover, the metal nut, the high-voltage shielding net and a fuse are concentrically arranged, and the voltage equalizing cover is in a metal annular bowl shape, and through holes with uniform shapes and sizes are uniformly distributed on the surface. The pressure equalizing cover has the advantages of simple structure and low manufacturing cost, effectively improves the running reliability of products, and can meet the use requirement of higher standards.
Description
Technical Field
The utility model relates to a voltage transformer component, in particular to a voltage equalizing device for improving partial discharge of a voltage transformer.
Background
The voltage transformer is provided with a high-voltage fuse at a high voltage end, and is generally detached and replaced by a rear insulation choke plug, so that partial point discharge or corona is easily generated by the voltage transformer due to uneven electric field distribution around the insulation choke plug. The long-time partial discharge shortens the service life of the voltage transformer and has potential safety hazards. When the voltage mutual inductance partial discharge test is carried out, the voltage equalizing cover is needed to eliminate or reduce the point discharge or corona caused by uneven field intensity distribution under high voltage so as to reach the partial discharge value meeting the standard. The voltage equalizing cover is generally flange-shaped, cannot cover the junction of the insulation choke plug and the large bolt completely, has poor shielding partial discharge effect, and aims at the defects of the prior art, the utility model provides a voltage equalizing device for improving partial discharge of a voltage transformer, and solves the problem of partial discharge at the junction of the insulation choke plug and a fuse. Meanwhile, the bowl-shaped pressure equalizing cover is prepared by utilizing the aluminum alloy, so that the effects of light weight and convenience in molding are realized.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides the voltage equalizing device for improving the partial discharge of the voltage transformer, which has the advantages of simple structure, low manufacturing cost and ideal effect of eliminating the discharge.
The technical scheme adopted by the utility model is that the voltage equalizing device for improving partial discharge of the voltage transformer is characterized in that a voltage equalizing cover is added at the joint of an insulating choke plug and a high-voltage shielding net, the voltage equalizing cover is connected with one end of a metal nut, the other end of the metal nut is contacted with the high-voltage shielding net to form a passage, the insulating choke plug, the voltage equalizing cover, the metal nut, the high-voltage shielding net and a fuse are concentrically arranged, and the voltage equalizing cover is in a metal annular bowl shape, and through holes with uniform shapes and sizes are uniformly distributed on the surface of the voltage equalizing cover.
Preferably, the surface of the pressure equalizing cover is a rough surface and is molded by casting with epoxy resin.
Preferably, the pressure equalizing cover is made of an aluminum alloy material.
Preferably, the voltage equalizing cover covers the insulation choke plug in a range of 15-20mm from the connecting position.
The beneficial effects of the utility model are as follows: the voltage equalizing cover is added at the joint of the insulating choke plug and the high-voltage shielding net and is connected with the high-voltage shielding net by metal nuts, and the high voltage can be uniformly distributed around by using the voltage equalizing cover, so that no potential difference exists between annular parts, and the voltage equalizing effect is achieved. The outer surface of the pressure equalizing cover is required to be subjected to sand blasting treatment to form a rough surface so as to be effectively combined with epoxy resin, thereby playing a role in preventing pulling out and rotation. The voltage equalizing cover is of a metal annular bowl-shaped structure, through holes with uniform shapes and sizes are uniformly distributed on the surface of the voltage equalizing cover, the generated high-voltage annular electric field can effectively shield discharge generated by high voltage, the partial discharge capacity of the voltage transformer is obviously improved, and the influence on the insulation performance of the voltage transformer due to the discharge is reduced. The pressure equalizing cover has the advantages of simple structure and low manufacturing cost, effectively improves the running reliability of products, and can meet the use requirement of higher standards.
Drawings
Fig. 1 is a schematic structural diagram of a voltage equalizing device for improving partial discharge of a voltage transformer according to the present utility model.
Fig. 2 is a schematic diagram of a voltage equalizing device for improving partial discharge of a voltage transformer according to the present utility model.
The marks in the figure: 1-voltage equalizing cover, 2-metal nut, 3-high voltage shielding net, 4-insulation choke plug, 5-fuse, 6-high voltage shielding net wire and 7-through hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
In order to solve the problem of partial discharge at the connection position of an insulating choke plug and a fuse, the utility model discloses a voltage equalizing device for improving the partial discharge of a voltage transformer, the specific structure is shown in fig. 1 and 2, a voltage equalizing cover 1 is added at the connection position of the insulating choke plug 4 and a high-voltage shielding net 3, and the range of the voltage equalizing cover 1 covering the insulating choke plug 4 is 15-20mm away from the connection position. The voltage equalizing cover 1 is connected with one end of the metal nut 2, the other end of the metal nut 2 is contacted with the high-voltage shielding net 3 to form a passage through a high-voltage shielding net wire 6, the insulating choke plug 4, the voltage equalizing cover 1, the metal nut 2, the high-voltage shielding net 3 and the fuse 5 are concentrically arranged, the voltage equalizing cover 1 is in a metal annular bowl shape, through holes 7 with uniform shapes and sizes are uniformly distributed on the surface, the outer surface of the voltage equalizing cover 1 is required to be subjected to sand blasting treatment to form a rough surface so as to be effectively combined with epoxy resin, the rough surface is formed by casting with the epoxy resin, and the voltage equalizing cover 1 is made of an aluminum alloy material. The voltage equalizing device is characterized in that the voltage equalizing cover 1 is added at the joint of the insulating choke plug 4 and the high-voltage shielding net 3, the voltage equalizing cover 1 is connected with the high-voltage shielding net 3 through the metal nuts 2, high voltage can be uniformly distributed around the voltage equalizing cover 1, and no potential difference exists between annular parts, so that the voltage equalizing effect is achieved. The outer surface of the pressure equalizing cover 1 needs to be subjected to sand blasting treatment to form a rough surface so as to be effectively combined with epoxy resin, thereby playing a role in preventing pulling out and rotation. The voltage equalizing cover 1 is of a metal annular bowl-shaped structure, through holes with uniform shapes and sizes are uniformly distributed on the surface, the generated high-voltage annular electric field can effectively shield discharge generated by high voltage, the partial discharge capacity of the voltage transformer is obviously improved, and the influence on the insulation performance of the voltage transformer due to the discharge is reduced. The pressure equalizing cover has the advantages of simple structure and low manufacturing cost, effectively improves the running reliability of products, and can meet the use requirement of higher standards.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides an improve voltage transformer partial discharge's voltage-sharing device which characterized in that: the insulation choke plug (4) and high-voltage shielding net (3) junction add pressure equalizing cover (1), pressure equalizing cover (1) link to each other with one end of metal nut (2), the other end of metal nut (2) and high-voltage shielding net (3) contact formation passageway, insulating choke plug (4), pressure equalizing cover (1), metal nut (2), high-voltage shielding net (3), fuse (5) set up with one heart, pressure equalizing cover (1) be metal annular bowl form, through-hole (7) that the surface evenly distributed shape size is unanimous.
2. The voltage equalizing device for improving partial discharge of a voltage transformer according to claim 1, wherein: the surface of the pressure equalizing cover (1) is a rough surface and is molded by casting with epoxy resin.
3. The voltage equalizing device for improving partial discharge of a voltage transformer according to claim 1, wherein: the pressure equalizing cover (1) is made of an aluminum alloy material.
4. The voltage equalizing device for improving partial discharge of a voltage transformer according to claim 1, wherein: the range of the pressure equalizing cover (1) covering the insulation choke plug (4) is 15-20mm away from the connecting position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322629003.9U CN221125703U (en) | 2023-09-26 | 2023-09-26 | Voltage equalizing device for improving partial discharge of voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322629003.9U CN221125703U (en) | 2023-09-26 | 2023-09-26 | Voltage equalizing device for improving partial discharge of voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221125703U true CN221125703U (en) | 2024-06-11 |
Family
ID=91338787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322629003.9U Active CN221125703U (en) | 2023-09-26 | 2023-09-26 | Voltage equalizing device for improving partial discharge of voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221125703U (en) |
-
2023
- 2023-09-26 CN CN202322629003.9U patent/CN221125703U/en active Active
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