CN214201580U - Capacitor voltage transformer with high-voltage protection - Google Patents
Capacitor voltage transformer with high-voltage protection Download PDFInfo
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- CN214201580U CN214201580U CN202120211240.1U CN202120211240U CN214201580U CN 214201580 U CN214201580 U CN 214201580U CN 202120211240 U CN202120211240 U CN 202120211240U CN 214201580 U CN214201580 U CN 214201580U
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Abstract
The utility model relates to a capacitance voltage transformer with high voltage protection, which comprises a high voltage capacitance part and a medium voltage capacitance part, wherein the high voltage capacitance part comprises an insulating shell and epoxy resin, the upper part of the epoxy resin is provided with a cylindrical cavity which is open upwards, a metal pressure cap is arranged at one end of the opening on the epoxy resin, and the upper side of the metal pressure cap is provided with a high voltage input terminal; the lower part of the epoxy resin is provided with a high-voltage capacitor integrally poured in the epoxy resin, a middle connecting line connected to the high-voltage capacitor and a secondary high-voltage output terminal, and the secondary high-voltage output terminal extends out of the lower end of the epoxy resin and is used for being connected with the middle-voltage capacitor; and a protection fusion tube is arranged in the columnar cavity, the upper end of the protection fusion tube is electrically connected with the metal pressing cap, and the lower end of the protection fusion tube is electrically connected with the high-voltage capacitor through a middle connecting line. The utility model discloses in, the top of high-voltage capacitor is equipped with the protection fusion tube, and the fusing can in time take place for the protection fusion tube when high-voltage input terminal access voltage is higher to protect high-voltage capacitor, the security of equipment is better.
Description
Technical Field
The utility model relates to an electrical equipment technical field, more specifically say, it relates to a capacitive voltage transformer with high-voltage protection.
Background
The capacitor voltage transformer is used as a capacitor transformer, has excellent economy and safety, and can be applied to a plurality of fields such as long-distance communication, remote measurement and the like. The capacitor voltage transformer is internally connected with a high-voltage capacitor part and a medium-voltage capacitor part in series, a high-voltage protection structure aiming at the high-voltage capacitor is lacked in the existing capacitor voltage transformer, and during use, the high-voltage capacitor is easy to damage under the condition of larger input voltage, so that the use safety of the capacitor voltage transformer is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a capacitive voltage transformer with high voltage protection can solve fragile under the present capacitive voltage transformer high pressure condition, the relatively poor technical problem of safety in utilization.
The utility model discloses a capacitive voltage transformer with high voltage protection's technical scheme does:
a capacitor voltage transformer with high voltage protection comprises a high voltage capacitor part and a medium voltage capacitor part, wherein the high voltage capacitor part comprises a cylindrical insulating shell, epoxy resin is poured into the insulating shell, the upper part of the epoxy resin is provided with a cylindrical cavity with an upward opening, one end of the opening of the epoxy resin is provided with a metal pressing cap, and the upper side of the metal pressing cap is provided with a high voltage input terminal; the lower part of the epoxy resin is provided with a high-voltage capacitor integrally poured in the epoxy resin, a middle connecting line connected to the high-voltage capacitor and a secondary high-voltage output terminal, and the secondary high-voltage output terminal extends out of the lower end of the epoxy resin and is used for being connected with the middle-voltage capacitor;
and a protection fusion tube is arranged in the columnar cavity, the upper end of the protection fusion tube is electrically connected with the metal pressing cap, and the lower end of the protection fusion tube is electrically connected with the high-voltage capacitor through a middle connecting line.
To sum up, the utility model discloses a following beneficial effect has: the capacitor voltage transformer with high-voltage protection is provided with a protection fuse tube above a high-voltage capacitor, the protection fuse tube can be fused in time under the high-voltage condition, the damage of the high-voltage capacitor caused by overlarge voltage in a circuit is prevented, and a better high-voltage protection effect can be achieved; the utility model discloses a capacitive voltage transformer with high-voltage protection, it is ingenious to think about, sets up the protection fusion tube that is used for protecting high-voltage capacitance at high-voltage capacitance part, can effectively prevent high-voltage capacitance from damaging, is favorable to saving equipment cost of maintenance and has improved equipment safety in utilization, can solve fragile under the present capacitive voltage transformer high pressure condition, the relatively poor technical problem of safety in utilization.
Furthermore, the metal pressing cap comprises a cap body and a mounting ring, wherein the outer side of the mounting ring is provided with an external thread and is screwed at an opening at the upper end of the epoxy resin through the external thread; the cap body comprises a middle cylinder and a retaining ring arranged on the periphery of the cylinder, the retaining ring comprises a horizontal part extending horizontally and a vertical part extending along the vertical direction outside the horizontal part, the inner side of the vertical part is provided with an internal thread, the cap body is in threaded connection with the mounting ring through the internal thread on the retaining ring, the cylinder on the cap body is inserted into the mounting ring, and the vertical part of the retaining ring is sleeved outside the mounting ring;
and a limiting groove for the upper end of the protection fusion tube to extend into is arranged on the lower end face of the column body, and the shape and the size of the limiting groove are matched with the appearance size of the upper end of the protection fusion tube.
Has the advantages that: the metal is pressed the cap and is adopted above-mentioned structure, is convenient for press the cap to carry out the dismouting to the metal when guaranteeing that the metal is pressed cap and epoxy firm in connection, and in addition, the metal is pressed and is set up the spacing groove on the cap, can prevent that the protection fusion tube from taking place to rock in the cylindrical cavity, and overall structure is comparatively stable.
Furthermore, a pressure spring positioned between the protection fusion tube and the bottom of the columnar cavity is arranged in the columnar cavity, the lower end of the pressure spring is connected with a screw fixed on epoxy resin in a threaded manner, the upper end of the pressure spring is pressed below the protection fusion tube, the screw is connected with the middle connecting line, and the protection fusion tube is electrically connected with the middle connecting line through the pressure spring and the screw.
Has the advantages that: the pressure spring is used for providing elastic force which upwards abuts against the metal pressing cap for the protection fusion tube, and the protection fusion tube can be guaranteed to be in good contact with the metal pressing cap.
Drawings
Fig. 1 is a schematic diagram of a high-voltage capacitor of a specific embodiment 1 of the capacitive voltage transformer with high-voltage protection according to the present invention;
FIG. 2 is a schematic diagram of the detail of the structure at A in FIG. 1;
reference numerals: 1-an insulating housing; 2-epoxy resin; 3-intermediate line; 4-high voltage capacitance; 5-secondary high voltage output terminal; 6-pressure spring; 7-protecting the fusion tube; 8-metal pressing cap; 81-a mounting ring; 82-a cap body; 83-a limiting groove; 9-high voltage input terminal.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses a capacitor voltage transformer's with high-voltage protection concrete embodiment 1:
because the utility model discloses a capacitive voltage transformer with high voltage protection structure innovation point lies in the high-voltage capacitor part, therefore mainly explains the structure of high-voltage capacitor part in drawing and the description.
The utility model discloses a capacitive voltage transformer's with high-voltage protection high-voltage capacitor part is as shown in figure 1, insulating casing 1 including the tube-shape, insulating casing 1's the outside has the full skirt, its inside pouring has epoxy 2, epoxy 2's the integrative pouring of lower part has high-voltage capacitor 4 and connects respectively on high-voltage capacitor 4, the middle line 3 and the secondary high-voltage output terminal 5 at lower both ends, secondary high-voltage output terminal 5's lower extreme stretches out from epoxy 2 lower extremes, secondary high-voltage output terminal 5 is as the output terminal of high-voltage capacitor part, be used for being connected with middling pressure electric capacity part.
The upper portion of epoxy 2 is equipped with the open column cavity up, and epoxy upper end is uncovered department and is installed the metal and press cap 8, installs high-voltage input terminal 9 on the metal presses cap 8, and high-voltage input terminal 9 is as the input terminal of high-voltage capacitor part for meet with external circuit. The inside protection fusion tube 7 that is equipped with of column cavity, the protection fusion tube 7 upper end is pressed the cap 8 electricity with the metal and is connected, and its lower extreme is connected with high-voltage capacitor 4 electricity through intermediate connection 3, consequently protects in fusion tube 7 cluster goes into the inside main road of high-voltage capacitor part, can be used for carrying out high-voltage protection to high-voltage capacitor 4, in time takes place to fuse when external access voltage is too high, prevents that high-voltage capacitor from damaging.
Specifically, as shown in fig. 1, the metal pressure cap 8 includes a cap body 82 and a mounting ring 81, an external thread is provided on an outer side of the mounting ring 81, an annular groove into which the mounting ring 81 is inserted is provided at an opening at an upper end of the epoxy resin 2, and the mounting ring 81 is inserted into the annular groove and is in threaded connection with the epoxy resin 2 through the external thread. The cap body 82 comprises a middle column body and a retaining ring arranged on the outer side of the column body, and the high-voltage input terminal 9 is installed at the upper end of the column body of the cap body 82 in a threaded mode; the retaining ring on the outer side of the column body comprises a horizontal part extending horizontally and a vertical part extending along the vertical direction on the outer side of the horizontal part, wherein inner threads are arranged on the inner side of the vertical part, the cap body 82 is connected with the upper end of the mounting ring 81 through the inner threads on the retaining ring, the column body is inserted into the mounting ring 81, and the vertical part on the retaining ring of the cap body 82 is sleeved on the outer side of the mounting ring 81.
In order to limit the position of the upper end of the protection fusion tube 7, a limiting groove 83 for the upper end of the protection fusion tube 7 to extend into is arranged on the lower end face of the column body of the cap body 82, the shape and the size of the limiting groove 83 are matched with the shape and the size of the upper end of the protection fusion tube 7, so that the upper end of the protection fusion tube 7 can be limited by the limiting groove 83 in the horizontal direction, and the protection fusion tube 7 is not prone to shaking.
The lower end of the columnar cavity is provided with a pressure spring 6 positioned between the protective fusion tube 7 and the bottom of the columnar cavity. A screw for fixing the lower end of the pressure spring 6 is arranged at the bottom of the columnar cavity on the epoxy resin 2, and the screw is fixedly connected with the lower end of the pressure spring 6 and is fixed on the epoxy resin 2 through threads; the upper end of the pressure spring 6 is pressed below the protection fusion tube 7 and used for providing elastic force for the protection fusion tube 7 to enable the protection fusion tube 7 to be in close contact with the metal pressure cap 8. On one hand, the protection fusion tube 7 can be ensured to be well contacted with the metal pressing cap 8, and a better conductive effect can be achieved; on the other hand, the protection fusion tube 7 is not easy to be separated from the limiting groove, and the position of the protection fusion tube 7 is stable. Meanwhile, the lower end of the screw is electrically connected with the middle connecting line, and the lower end of the protection fusion tube is electrically connected with the middle connecting line through the pressure spring and the screw, so that the protection fusion tube is connected with the high-voltage capacitor 4 in series, and a high-voltage protection effect can be achieved.
The utility model discloses in, set up the protection fusion tube in high-voltage capacitor's top in high-voltage capacitor part, when high-voltage input terminal input voltage is great, the protection fusion tube in time takes place to fuse, makes the major loop disconnection in the high-voltage capacitor part, can not cause the damage to high-voltage capacitor, has better high-pressure guard action, only need during routine maintenance to the protection fusion tube change can, both saved the routine maintenance cost, improved capacitive voltage transformer's safety in utilization again.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various 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 (3)
1. A capacitor voltage transformer with high voltage protection comprises a high voltage capacitor part and a medium voltage capacitor part and is characterized in that the high voltage capacitor part comprises a cylindrical insulating shell, epoxy resin is poured into the insulating shell, a cylindrical cavity with an upward opening is arranged at the upper part of the epoxy resin, a metal pressing cap is arranged at one end of the opening of the epoxy resin, and a high voltage input terminal is arranged at the upper side of the metal pressing cap; the lower part of the epoxy resin is provided with a high-voltage capacitor integrally poured in the epoxy resin, a middle connecting line connected to the high-voltage capacitor and a secondary high-voltage output terminal, and the secondary high-voltage output terminal extends out of the lower end of the epoxy resin and is used for being connected with the middle-voltage capacitor;
and a protection fusion tube is arranged in the columnar cavity, the upper end of the protection fusion tube is electrically connected with the metal pressing cap, and the lower end of the protection fusion tube is electrically connected with the high-voltage capacitor through a middle connecting line.
2. The capacitive voltage transformer with high voltage protection as claimed in claim 1, wherein the metal pressing cap comprises a cap body and a mounting ring, the outer side of the mounting ring is provided with external threads and is screwed in the opening at the upper end of the epoxy resin through the external threads; the cap body comprises a middle cylinder and a retaining ring arranged on the periphery of the cylinder, the retaining ring comprises a horizontal part extending horizontally and a vertical part extending along the vertical direction outside the horizontal part, the inner side of the vertical part is provided with an internal thread, the cap body is in threaded connection with the mounting ring through the internal thread on the retaining ring, the cylinder on the cap body is inserted into the mounting ring, and the vertical part of the retaining ring is sleeved outside the mounting ring;
and a limiting groove for the upper end of the protection fusion tube to extend into is arranged on the lower end face of the column body, and the shape and the size of the limiting groove are matched with the appearance size of the upper end of the protection fusion tube.
3. The capacitive voltage transformer with high voltage protection as claimed in claim 2, wherein a compression spring is disposed inside the cylindrical cavity between the protection fuse tube and the bottom of the cylindrical cavity, the compression spring has a lower end connected to a screw fixed on the epoxy resin, and an upper end abutting against the lower side of the protection fuse tube, the screw is connected to the middle connection line, and the protection fuse tube is electrically connected to the middle connection line through the compression spring and the screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120211240.1U CN214201580U (en) | 2021-01-26 | 2021-01-26 | Capacitor voltage transformer with high-voltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120211240.1U CN214201580U (en) | 2021-01-26 | 2021-01-26 | Capacitor voltage transformer with high-voltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214201580U true CN214201580U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120211240.1U Active CN214201580U (en) | 2021-01-26 | 2021-01-26 | Capacitor voltage transformer with high-voltage protection |
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| Country | Link |
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| CN (1) | CN214201580U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220719A (en) * | 2022-02-24 | 2022-03-22 | 珠海市联电科技有限公司 | Drop-out fuse and direct-current high-voltage trial delivery test system |
-
2021
- 2021-01-26 CN CN202120211240.1U patent/CN214201580U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220719A (en) * | 2022-02-24 | 2022-03-22 | 珠海市联电科技有限公司 | Drop-out fuse and direct-current high-voltage trial delivery test system |
| CN114220719B (en) * | 2022-02-24 | 2022-05-20 | 珠海市联电科技有限公司 | Drop-out fuse and direct-current high-voltage trial transmission test system |
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