CN216598723U - Gas insulation voltage transformer cabinet - Google Patents
Gas insulation voltage transformer cabinet Download PDFInfo
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- CN216598723U CN216598723U CN202122813524.0U CN202122813524U CN216598723U CN 216598723 U CN216598723 U CN 216598723U CN 202122813524 U CN202122813524 U CN 202122813524U CN 216598723 U CN216598723 U CN 216598723U
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Abstract
The utility model relates to a gas insulation voltage transformer cabinet, which comprises a gas box and a main frame for supporting the gas box, wherein the gas box comprises an isolating switch and a voltage transformer, an alternating current three-phase line enters the gas box from a high-voltage wall bushing above a cabinet body of the voltage transformer cabinet, is connected to a high-voltage wiring end after passing through the isolating switch, is connected to a first iron core after passing through a fuse and is wound into a primary coil, and the primary coil is grounded through a primary harmonic elimination coil wound on a second iron core after being synthesized by three phases. According to the utility model, the voltage transformer is arranged in the air box, so that the problems of complex wiring, potential safety hazard and space waste caused by the arrangement of the voltage transformer cabinet in the prior art are solved.
Description
Technical Field
The utility model relates to the technical field of gas insulated switchgear, in particular to a gas insulated voltage transformer cabinet.
Background
SF is generally adopted by a gas insulation voltage transformer cabinet6Gas, N2The gas or the mixed gas thereof is used as an insulating medium, has the advantages of small volume, high reliability and good safety, and is widely applied to the field of medium-voltage power distribution. The voltage transformer is core equipment of the voltage transformer cabinet and has the functions of measurement, power supply, protection and the like. In traditional gas insulation voltage transformer cabinet, the gas tank filled with insulating medium is arranged on the middle upper part of the cabinet body, and the isolating switch is arranged inside the gas tank, the isolating switch is connected with the bus, the voltage transformer is arranged at the bottom of the cabinet body, and the high-voltage part enters the gas tank gas insulation voltage transformer cabinet through a connecting cable and a gas inlet and outlet tank sleeve and is connected with the isolating switch through a conductor and finally conducted with the bus. Fig. 1 shows a schematic structural diagram of a gas-insulated voltage transformer cabinet in the prior art, wherein in fig. 1, gasThe body insulation voltage transformer cabinet comprises an air box 1, an isolating switch 11 and a voltage transformer 12, wherein the voltage transformer 12 is arranged on the lower portion of the voltage transformer cabinet, the voltage transformer under the layout mode needs to be subjected to epoxy pouring to meet the insulation requirement, wiring is complex, potential safety hazards exist, and the problem of space waste exists.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned circumstances of the prior art, an object of the present invention is to provide a gas-insulated voltage transformer cabinet having advantages of high reliability, good economy, and compact structure by incorporating a voltage transformer in a gas tank.
To achieve the above object, according to one aspect of the present invention, there is provided a gas insulated voltage transformer cabinet including a gas tank and a main frame supporting the gas tank; the gas tank comprises an isolating switch and a voltage transformer; wherein the content of the first and second substances,
the voltage transformer comprises a high-voltage terminal, a fuse cabin with a built-in fuse, a first iron core and a second iron core;
an alternating current three-phase line enters the air box from a high-voltage wall bushing above the cabinet body of the voltage transformer, sequentially passes through the isolating switch, the high-voltage wiring end and the fuse, and then is connected to the first iron core to be wound into a primary coil, and the primary coil is grounded through a primary harmonic elimination coil wound on the second iron core after being synthesized by three phases.
Furthermore, the high-voltage wiring end, the fuse bin and the first iron core all comprise three-phase independent structures, and correspond to the alternating-current three-phase line.
Furthermore, a secondary resonance elimination coil and a protection wiring coil are wound on the second iron core;
the protection wiring coil forms a protection output end.
Further, a secondary coil is wound on the first iron core;
one end of the secondary coil is grounded through a secondary resonance elimination coil wound on the second iron core after three-phase synthesis, and the other end of the secondary coil is used as the output end of the voltage transformer.
Further, the device also comprises a first fixing structure and a second fixing structure.
Further, the first fixing structure is used for sealing and fixing the fuse bin to the inner wall of the air box, so that the built-in fuse can be replaced outside the air box.
Further, the second fixing structure is used for fixing the voltage transformer to the inner wall of the air box.
Further, the main frame supporting the air box includes a secondary chamber, a mechanism chamber, and a pressure relief passage.
Furthermore, the output end of the voltage transformer and the protection output end penetrate out of the air box through an aviation plug and enter the secondary chamber;
the output end of the voltage transformer is output to a measuring device;
and the protection output end is output to the protection device.
Further, the gas tank is filled with an insulating gas and sealed.
In summary, the utility model provides a gas-insulated voltage transformer cabinet, which comprises a gas box and a main frame supporting the gas box, wherein the gas box comprises an isolating switch and a voltage transformer, an alternating-current three-phase line enters the gas box from a high-voltage wall bushing above a cabinet body of the voltage transformer cabinet, is connected to a high-voltage terminal after passing through the isolating switch, is connected to a first iron core after passing through a fuse to be wound into a primary coil, and is grounded through a primary resonance elimination coil wound on a second iron core after being synthesized by three phases. According to the utility model, the voltage transformer is arranged in the air box, so that the problems of complex wiring, potential safety hazard and space waste caused by the arrangement of the voltage transformer cabinet in the prior art are solved.
The utility model has the following beneficial technical effects:
(1) compare with traditional gas insulation voltage transformer cabinet, the physical distance of voltage transformer and high-voltage terminal of built-in the gas tank shortens by a wide margin to can make whole cabinet structure compacter, and reduce whole cabinet product cost.
(2) The voltage transformer is arranged in the gas box, the insulating gas can be used for replacing epoxy resin as a main insulating medium, and the insulating property of the gas has good restorability, so that the voltage transformer cabinet provided by the utility model has better insulating property, and the product cost of the transformer is reduced. And realized can change the fuse outside to can utilize the structural design of gas tank space better.
3) According to the voltage transformer cabinet provided by the utility model, when the voltage transformer obtains a high-voltage power supply, the voltage transformer does not need to pass through the wall of the air box, so that the safety risk caused by the voltage transformer cabinet is reduced, and the reliability of the whole cabinet product is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art gas insulated voltage transformer cabinet;
FIG. 2 is a schematic view of the overall structure of the gas insulated voltage transformer cabinet of the present invention;
fig. 3 is a schematic diagram of a coil winding circuit of the iron core.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to an embodiment of the present invention, there is provided a gas insulated voltage transformer cabinet having an overall configuration as schematically shown in fig. 1, including a gas box 1 and a main frame supporting the gas box. Therein, the gas box 1 is provided with a disconnecting switch 11, a voltage transformer 12 and an electrical connection, which may include an electrically connected conductor, such as a copper bar. The voltage transformer 12 includes a high voltage terminal 121, a fuse box 122 having a fuse built therein, a first core 123, and a second core 124. The high-voltage terminal 121, the fuse box 122 and the iron core 123 all have three-phase independent structures, which correspond to A, B and C three-phase lines of an alternating current system of a main conductive loop. Ac three-phase lines, such as A, B and C three-phase lines, enter the gas box 1 from a high-voltage wall bushing above the cabinet body of the voltage transformer, pass through the isolating switch 11 and then are connected to the high-voltage terminal 121, and pass through a series fuse, which means that a fuse is connected in series with a coil mentioned later, and then are connected to the first iron core 123 to be wound into a primary coil 1231, so that the fuse and the primary coil in the line are connected in series. The primary coil 1231 is grounded through the primary resonance elimination coil 1241 wound around the second core 124 after three-phase synthesis. The three-phase synthesis can be realized by winding 3 wire outlet ends of the primary coil of the three-phase line on the second iron core through (converging) the same wire inlet end to form a resonance elimination coil. Fig. 3 shows a schematic diagram of a winding route of the core, and as shown in fig. 3, the second core 124 is wound with a second resonance elimination coil 1242 and a protection wiring coil 1243 in addition to the first resonance elimination coil 1241; the protection wiring coil 1243 constitutes a protection output terminal. The first core 123 is wound with a secondary coil 1232 in addition to the primary coil 1231. One end of the secondary coil 1231 is grounded through the secondary resonance elimination coil 1242 wound on the second iron core 124 after three-phase synthesis, and the other end is used as the output end of the voltage transformer.
In addition, the voltage transformer cabinet also comprises a first fixing structure and a second fixing structure. The first fixing structure is used for hermetically fixing the fuse bin to the inner wall of the gas box so as to enable replacement of the built-in fuse outside the gas box. The fuse wire bin is fixed on the inner wall, namely the fixed contact surface of the fuse wire bin is in the air box. The air box is provided with an opening at the fixed position of the fuse bin, one side of the fuse bin is communicated with the inner wall of the air box, and the other side of the fuse bin is communicated with the outer wall of the air box. So that the fuse wire can be replaced on the side communicating with the outer wall of the gas tank, namely, the outside. The second fixing structure is used for fixing the voltage transformer to the inner wall of the air box. The main frame of the supporting air box comprises a secondary chamber, a mechanism chamber and a pressure relief channel. The output end and the protection output end of the voltage transformer penetrate out of the air box through the aviation plug and enter the secondary chamber; the output end of the voltage transformer is output to a measuring device; and the protection output end is output to the protection device. The gas tank 1 is filled with an insulating gas and sealed.
In summary, the present invention relates to a gas insulated voltage transformer cabinet, which includes a gas box and a main frame supporting the gas box, wherein the gas box includes an isolation switch and a voltage transformer, an ac three-phase line enters the gas box from a high-voltage wall bushing above a cabinet body of the voltage transformer cabinet, passes through the isolation switch, is connected to a high-voltage terminal, passes through a fuse, is connected to a first iron core, and is wound into a primary coil, and the primary coil is grounded through a primary resonance elimination coil wound on a second iron core after being synthesized by three phases. According to the utility model, the voltage transformer is arranged in the air box, so that the problems of complex wiring, potential safety hazard and space waste caused by the arrangement of the voltage transformer cabinet in the prior art are solved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A gas insulation voltage transformer cabinet is characterized by comprising a gas box and a main frame for supporting the gas box; the gas tank comprises an isolating switch and a voltage transformer; wherein the content of the first and second substances,
the voltage transformer comprises a high-voltage terminal, a fuse cabin with a built-in fuse, a first iron core and a second iron core;
an alternating current three-phase line enters the air box from a high-voltage wall bushing above the voltage transformer cabinet body, sequentially passes through the isolating switch, the high-voltage wiring end and the fuse, is connected to the first iron core and is wound into a primary coil, and the primary coil is grounded through a primary harmonic elimination coil wound on the second iron core after three-phase synthesis.
2. The voltage transformer cabinet according to claim 1, wherein the high voltage terminal, fuse box and first core each comprise a three-phase independent structure corresponding to the ac three-phase line.
3. The voltage transformer cabinet according to claim 2, wherein a second harmonic elimination coil and a protection wiring coil are further wound on the second iron core;
the protection wiring coil forms a protection output end.
4. The voltage transformer cabinet according to claim 3, wherein a secondary coil is further wound on the first iron core;
one end of the secondary coil is grounded through a secondary resonance elimination coil wound on the second iron core after three-phase synthesis, and the other end of the secondary coil is used as the output end of the voltage transformer.
5. The voltage transformer cabinet of claim 4, further comprising a first fixed structure and a second fixed structure.
6. The voltage transformer cabinet according to claim 5, wherein the first fixing structure is used for hermetically fixing the fuse box to an inner wall of the gas box so as to enable replacement of the built-in fuse outside the gas box.
7. The voltage transformer cabinet according to claim 6, wherein the second fixing structure is used for fixing the voltage transformer to the inner wall of the air box.
8. The voltage transformer cabinet according to claim 7, wherein the main frame supporting the air box includes a secondary chamber, a mechanism chamber, and a pressure relief channel.
9. The voltage transformer cabinet according to claim 8, wherein the voltage transformer output and the protection output pass out of the air box and into the secondary chamber through an aviation plug;
the output end of the voltage transformer is output to a measuring device;
and the protection output end is output to the protection device.
10. The voltage transformer cabinet according to claim 9, wherein the gas box is filled with an insulating gas and sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122813524.0U CN216598723U (en) | 2021-11-18 | 2021-11-18 | Gas insulation voltage transformer cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122813524.0U CN216598723U (en) | 2021-11-18 | 2021-11-18 | Gas insulation voltage transformer cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216598723U true CN216598723U (en) | 2022-05-24 |
Family
ID=81647085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122813524.0U Active CN216598723U (en) | 2021-11-18 | 2021-11-18 | Gas insulation voltage transformer cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216598723U (en) |
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2021
- 2021-11-18 CN CN202122813524.0U patent/CN216598723U/en active Active
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