CN222462583U - Take fuse to connect ground type voltage transformer - Google Patents
Take fuse to connect ground type voltage transformer Download PDFInfo
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- CN222462583U CN222462583U CN202421211444.5U CN202421211444U CN222462583U CN 222462583 U CN222462583 U CN 222462583U CN 202421211444 U CN202421211444 U CN 202421211444U CN 222462583 U CN222462583 U CN 222462583U
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- primary
- voltage transformer
- fuse
- voltage
- winding
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- 238000004804 winding Methods 0.000 claims abstract description 43
- 239000012212 insulator Substances 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 11
- 229920000647 polyepoxide Polymers 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 2
- 229920001296 polysiloxane Polymers 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 3
- 230000001131 transforming effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002301 combined effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
本实用新型公开了一种带熔断器接地式电压互感器，涉及电力系统高压测量或继电保护设备技术领域；包括内置在主绝缘体的电压器身，所述电压器身包括一次绕组、二次绕组及铁芯，二次绕组和一次绕组由内到外同心缠绕于铁芯上，一次绕组为多根漆包圆铜线并列排列为一股分级由内向外宝塔式绕制，相邻两层漆包圆铜线之间设有绝缘纸，每级外侧缠绕一层一次高压静电屏，并由绝缘纸与漆包圆铜线隔开，所述一次高压静电屏宽度大于对应层级层间绝缘纸宽度；电压器身顶部设有一次绝缘筒，采用封头螺栓及硅胶垫将熔断器密封于一次绝缘筒内，所述一次绝缘筒上面设有一次高压端子。其占用空间更小，检修简单，内外部电场均匀，局部放电量小，运行安全可靠。
The utility model discloses a grounded voltage transformer with fuse, which relates to the technical field of high-voltage measurement or relay protection equipment in power system; it comprises a voltage transformer body built in a main insulator, the voltage transformer body comprises a primary winding, a secondary winding and an iron core, the secondary winding and the primary winding are concentrically wound on the iron core from inside to outside, the primary winding is a plurality of enameled round copper wires arranged in parallel as a hierarchical pagoda winding from inside to outside, insulating paper is arranged between two adjacent layers of enameled round copper wires, a primary high-voltage electrostatic screen is wound on the outside of each level, and the insulating paper and the enameled round copper wire are separated, the width of the primary high-voltage electrostatic screen is greater than the width of the insulating paper between the corresponding layers; a primary insulating cylinder is arranged on the top of the voltage transformer body, the fuse is sealed in the primary insulating cylinder by a head bolt and a silicone pad, and a primary high-voltage terminal is arranged on the primary insulating cylinder. It occupies less space, is simple to maintain, has uniform internal and external electric fields, small partial discharge, and is safe and reliable in operation.
Description
Technical Field
The utility model relates to the technical field of high-voltage measurement or relay protection equipment of a power system, in particular to a grounded voltage transformer with a fuse.
Background
The voltage transformer is similar to a transformer, is an instrument for transforming the voltage on a line, but the purpose of transforming the voltage by the transformer is to transmit electric energy, and the purpose of transforming the voltage by the voltage transformer is mainly to supply power to a measuring instrument and a relay protection device and to measure the voltage, the power and the electric energy of the line, so that the capacity of the voltage transformer is very small, generally only a few volt-amperes and tens of volt-amperes, and the maximum is not more than one kilovolt-ampere.
The basic structure of the voltage transformer is very similar to that of a transformer, and the transformer also comprises two windings, namely a primary winding and a secondary winding, when alternating current is introduced into the primary winding, alternating current magnetic flux is generated in the iron core, so that voltage is induced in the secondary winding, and the secondary winding is low-voltage although the primary voltage is very high, so that the safety of operators and meters can be ensured, and the voltage in a high-voltage circuit can be conveniently detected.
In the use of voltage transformer, when the circuit takes place the short circuit, and the current increases sharply, the circuit is broken off to the fuse that often uses, avoids the current too big and causes the circuit to damage, but traditional voltage transformer component part that has the fuse is more, and inside and outside electric field is inhomogeneous, and size and insulating quality requirement are very strict, and is relatively complicated when installation and maintenance, and quality control point is very many, otherwise can influence voltage transformer's wholeness ability, can buried hidden danger for cubical switchboard actual operation security.
Disclosure of utility model
The utility model aims to provide the grounding type voltage transformer with the fuse, which is formed by vacuum casting of epoxy resin and has the advantages of small volume, flexible installation, easy maintenance, uniform internal and external electric fields, small partial discharge capacity and the like.
In order to achieve the above object, the present application provides a grounded voltage transformer with a fuse, comprising a transformer body built in a main insulator, the transformer body comprising a primary winding, a secondary winding and an iron core, wherein the secondary winding and the primary winding are concentrically wound on the iron core from inside to outside, the primary winding is formed by arranging a plurality of enamelled round copper wires in parallel into a strand of cascade winding from inside to outside, insulating paper is arranged between two adjacent layers of enamelled round copper wires, a layer of primary high-voltage electrostatic screen is wound on the outer side of each stage and is separated from the enamelled round copper wires by the insulating paper, and the width of the primary high-voltage electrostatic screen is larger than that of interlayer insulating paper of the corresponding layer; the top of the voltage transformer body is provided with a primary insulating cylinder, the front end of the primary insulating cylinder adopts a head bolt and a silica gel pad to seal the fuse in the primary insulating cylinder, and a primary high-voltage terminal is arranged on the primary insulating cylinder.
Further, the primary high-voltage electrostatic screen is a structure that rubber strips are clamped at two sides of flexible composite paper and is wrapped with a whole piece of semiconductive crepe paper, and the cross section of the primary high-voltage electrostatic screen is in a shape with smooth protrusions at two sides and a flat middle.
Further, a screw sleeve nut is arranged in the front end of the primary insulating cylinder and connected with the primary high-voltage terminal, and the seal head bolt penetrates through the silica gel pad to be matched with the screw sleeve nut to seal the fuse.
Further, the primary winding is connected with a primary wiring insert which is fixed on the primary insulating cylinder, a spring in the primary insulating cylinder is fixed through a screw, the spring is abutted against the rear end of the fuse, and the primary wiring insert is in threaded connection with the shielding net.
Further, a primary grounding N end and a secondary wiring terminal are arranged on the secondary wiring table at the lower part of the front side of the main insulator, and the grounding terminal is arranged at the rear end of the main insulator.
Furthermore, the main insulator is an integral structure formed by casting the voltage body, the primary insulating cylinder, the primary high-voltage terminal, the threaded sleeve nut and the secondary wiring table through epoxy resin, and the integral structure is integrally installed on the installation bottom plate.
Furthermore, the main insulator is of a cuboid structure, and the lower part of the four edges of the main insulator is of a unfilled corner structure.
Further, the end part of the shielding net is a circular arc-shaped nut metal piece, and the periphery of the circular arc-shaped nut metal piece is a cylindrical wire net and extends to one side.
Further, the shielding net is arranged in the epoxy resin of the primary insulating cylinder and positioned at the periphery of the fuse.
Further, the end socket bolt is a metal piece bolt, and a nut of the end socket bolt is plum blossom-shaped and is formed by vacuum casting of epoxy resin.
Compared with the prior art, the technical scheme adopted by the utility model has the advantages that:
1. The voltage transformer integrates various functions of fuse protection, electric conduction and the like, reduces the size, occupies smaller space, is beneficial to miniaturization of products, has light weight and complete functions, and is more suitable for being used as a novel voltage transformer matched with a switch cabinet;
2. The installation is convenient, the maintenance is easy, when the installation is used, the voltage transformer is only required to be installed in the switch cabinet in sequence, other various electrical accessories are not required to be additionally installed, and the assembly time of the switch cabinet is effectively saved;
3. The primary insulating cylinder is arranged by adopting a shielding net and a primary winding and additionally provided with an electrostatic screen, has better combined effect shielding effect, uniform internal and external electric fields, small local discharge capacity and safe and reliable operation, is integrally cast by adopting epoxy resin, is insulating and reliable, saves more electric connection parts, effectively avoids a plurality of quality hidden troubles in design, and ensures safer operation.
Drawings
FIG. 1 is a cross-sectional view of a grounded voltage transformer with a fuse;
FIG. 2 is a front view of a grounded voltage transformer with a fuse;
FIG. 3 is a side view of a grounded voltage transformer with a fuse;
FIG. 4 is a top view of a grounded voltage transformer with a fuse;
1, a primary winding; 2, a voltage device body, 3, a primary high-voltage electrostatic screen, 4, a main insulator, 5, a secondary wiring platform, 6, an installation bottom plate, 7, a secondary wiring terminal, 8, a secondary protective cover, 9, a grounding terminal, 10, a shielding net, 11, a primary wiring insert, 12, a fuse, 13, a head bolt, 14, a threaded nut, 15, a primary high-voltage terminal, 16, a silica gel pad, 17 and a primary insulating cylinder.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present application, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The embodiment provides a grounded voltage transformer with a fuse, which comprises a main insulator, wherein the main insulator is an integrated structure formed by casting a voltage transformer body 2, a primary insulating cylinder 17, a primary high-voltage terminal 15, a threaded nut 14 and a secondary wiring platform 5 by adopting epoxy resin, and the integrated structure is positioned on an installation bottom plate;
As shown in fig. 1, the voltage transformer body 2 comprises a primary winding 1, a secondary winding and an iron core, wherein the secondary winding and the primary winding 1 are concentrically wound on the iron core from inside to outside, the primary winding 1 is formed by arranging a plurality of enamelled round copper wires in parallel into a multi-layer tower type winding from inside to outside, insulating paper is arranged between two adjacent layers of enamelled round copper wires, a layer of primary high-voltage electrostatic screen 3 is wound on the outer side of each layer, and is separated from the enamelled round copper wires by the insulating paper, and the width of the primary high-voltage electrostatic screen 3 is larger than that of the interlayer insulating paper of the corresponding layer;
as a preferred implementation manner provided by the embodiment, the primary high-voltage electrostatic screen 3 is a structure that rubber strips are clamped at two sides of flexible composite paper and is wrapped with a whole piece of semiconductive crepe paper, and the cross section of the primary high-voltage electrostatic screen 3 is in a shape that the middle of the primary high-voltage electrostatic screen is flat and the two sides of the primary high-voltage electrostatic screen are smooth and convex.
As shown in fig. 2-4, a primary insulating cylinder 17 is arranged at the top of the voltage transformer body, a threaded sleeve nut 14 is arranged in the front end of the primary insulating cylinder, the threaded sleeve nut 14 is connected with a primary high-voltage terminal 15, the threaded sleeve nut 14 is in threaded fit with a seal head bolt 13, a silica gel pad 16 is added to seal a corresponding fuse 12, and the shape of the seal head bolt 13 is plum blossom-shaped.
In the embodiment of the utility model, the secondary wiring platform 5 at the lower part of the front side of the main insulator 4 is provided with a primary grounding N end and a secondary wiring terminal 7, the grounding terminal 9 is arranged on the mounting bottom plate 6 and is positioned at the rear end of the main insulator 4, and the secondary protection cover 8 is positioned on the secondary wiring platform for protecting the secondary wiring terminal.
In the embodiment of the utility model, the primary winding 1 is connected with the primary wiring insert 11, the primary wiring insert 11 is fixed on the primary insulating cylinder 17, a spring in the primary insulating cylinder 17 is fixed by a screw, the spring is abutted against the rear end of the fuse 12, and the primary wiring insert 11 is in threaded connection with the shielding net 10. Preferably, the shielding net 10 is formed by spot welding a cylindrical wire mesh circumscribed by an end arc-shaped nut metal piece.
The manufacturing process of the grounded voltage transformer with the fuse comprises the steps that a primary winding 1 and a secondary winding are concentrically wound on an insulating framework, the primary winding 1 is wound in a grading manner, an insulating paper and a layer of electrostatic screen 3 are additionally arranged on each stage of winding, the electrostatic screen 3 is wound outside each stage of insulating paper, and the width of each stage of electrostatic screen 3 is larger than that of the interlayer insulating paper of each stage so as to shield the high-voltage electric field of each stage; the primary and secondary windings are sleeved on an iron core after being wound, the transformer body 2 is formed after the iron core is assembled, insulated and buffered and wrapped, the transformer body is fixed in a casting mould, a shielding net 10 and a primary wiring insert 11 are connected, a threaded sleeve nut 14, a primary high-voltage terminal 15 and the primary wiring insert 11 are fixed, a secondary wiring is connected, the insulation distance is adjusted, an epoxy resin is adopted for vacuum casting and curing to form a main insulator 4, the main insulator is finally arranged on an installation bottom plate 6, a primary insulating cylinder 17 for sealing a fuse 12 is in a semi-cylindrical shape which is horizontally arranged, the transformer body is used for insulation of the fuse 12, a uniform electric field is ensured around the transformer body and is a main insulating transition piece, the primary sealing is formed by adopting a threaded sleeve nut 14 and a threaded sleeve 16 which are fixedly arranged at the front end of the primary insulating cylinder 17 in the middle of a sealing bolt 13, the sealing reliable and effective electrical contact of the primary high-voltage fuse is ensured, the sealing bolt 13 is in a sufficient mechanical strength, the sealing bolt is formed by adopting epoxy resin for casting with the metal piece bolt, the epoxy resin has a sufficient insulation, the outer part of plum blossom shape, the fuse body is convenient to be manually installed or replaced, the fuse body is not required to be replaced by the primary insulating cylinder 17, the sealing bolt is replaced by the primary insulating cylinder 17, the transformer body is particularly required to be replaced by the sealing the primary insulating cylinder 17, and the transformer body is replaced by the primary insulating cylinder is replaced by the sealing cylinder, and the primary high-voltage terminal, and the primary winding wire is directly by the primary winding, and the primary winding. The insulation distance between the primary high voltage and the ground is increased.
When the transformer is used, the fuse is firstly arranged in the primary insulating cylinder 17, then the front end of the insulating cylinder is sealed by threads of the threaded sleeve nut 14 and the head bolt 1, the transformer is sequentially arranged on the switch cabinet according to the phase sequence distance through the mounting bottom plate, finally, the connection of the secondary cable and the secondary socket is carried out, the secondary protective cover 14 is additionally arranged, and the assembly work of the voltage transformer is completed.
The effect of this embodiment lies in that, product volume is little, the function is complete, simple to operate, easy to maintain, insulation stability, operation safety have promoted the design manufacturing level of voltage transformer and cubical switchboard.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present application.
Claims (10)
1. The grounded voltage transformer with the fuse comprises a transformer body which is internally arranged in a main insulator and comprises a primary winding, a secondary winding and an iron core, wherein the secondary winding and the primary winding are concentrically wound on the iron core from inside to outside, the primary winding is formed by arranging a plurality of enamelled round copper wires in parallel into a strand of cascade winding from inside to outside, insulating paper is arranged between two adjacent layers of enamelled round copper wires, a layer of primary high-voltage electrostatic screen is wound on the outer side of each stage and is separated from the enamelled round copper wires by the insulating paper, and the width of the primary high-voltage electrostatic screen is larger than that of interlayer insulating paper of the corresponding layer; the top of the voltage transformer body is provided with a primary insulating cylinder, the front end of the primary insulating cylinder adopts a head bolt and a silica gel pad to seal the fuse in the primary insulating cylinder, and a primary high-voltage terminal is arranged on the primary insulating cylinder.
2. The grounded voltage transformer with the fuse according to claim 1, wherein the primary high-voltage electrostatic screen is formed by clamping rubber strips on two sides of flexible composite paper and wrapping the flexible composite paper with a whole semiconductive crepe paper structure, and the cross section of the primary high-voltage electrostatic screen is in a shape of smooth bulges on two sides with a flat middle.
3. The grounded voltage transformer with the fuse according to claim 1, wherein a threaded sleeve nut is arranged in the front end of the primary insulating cylinder, the threaded sleeve nut is connected with the primary high-voltage terminal, and the head bolt passes through the silica gel pad to be matched with the threaded sleeve nut to seal the fuse.
4. The grounded voltage transformer with a fuse according to claim 1, wherein the primary winding is connected to a primary wire insert, the primary wire insert is fixed to a primary insulating cylinder, a spring in the primary insulating cylinder is fixed by a screw, the spring abuts against the rear end of the fuse, and the primary wire insert is in threaded connection with a shielding net.
5. A grounded voltage transformer with fuse according to claim 3, wherein the secondary wiring block at the lower part of the front side of the main insulator is provided with a primary grounding N-terminal and a secondary wiring terminal, the grounding terminal is provided at the rear end of the main insulator, and the secondary wiring terminal is located in the secondary protection cover.
6. The grounded voltage transformer with fuse according to claim 5, wherein the main insulator is an integral structure formed by casting the body, the primary insulating cylinder, the primary high-voltage terminal, the threaded nut and the secondary wiring block with epoxy resin, and the integral structure is integrally mounted on the mounting base plate.
7. The grounded voltage transformer with fuse according to claim 1 or 6, wherein the main insulator has a rectangular parallelepiped structure, and the lower part of the four edges has a corner-missing structure.
8. The grounded voltage transformer with fuse according to claim 4, wherein the end of the shielding net is a circular arc nut metal piece, and the periphery of the circular arc nut metal piece is a cylindrical wire mesh and extends to one side.
9. The grounded voltage transformer with fuse of claim 4 in which the shielding mesh is disposed in the epoxy of the primary insulation barrel at the periphery of the fuse.
10. The grounded voltage transformer with fuse according to claim 6, wherein the head bolt is a metal piece bolt, and the nut is quincuncial and is formed by vacuum casting of epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421211444.5U CN222462583U (en) | 2024-05-30 | 2024-05-30 | Take fuse to connect ground type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421211444.5U CN222462583U (en) | 2024-05-30 | 2024-05-30 | Take fuse to connect ground type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222462583U true CN222462583U (en) | 2025-02-11 |
Family
ID=94436002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421211444.5U Active CN222462583U (en) | 2024-05-30 | 2024-05-30 | Take fuse to connect ground type voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222462583U (en) |
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2024
- 2024-05-30 CN CN202421211444.5U patent/CN222462583U/en active Active
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