CN219625683U - Voltage transformer testing device - Google Patents
Voltage transformer testing device Download PDFInfo
- Publication number
- CN219625683U CN219625683U CN202321072247.5U CN202321072247U CN219625683U CN 219625683 U CN219625683 U CN 219625683U CN 202321072247 U CN202321072247 U CN 202321072247U CN 219625683 U CN219625683 U CN 219625683U
- Authority
- CN
- China
- Prior art keywords
- layer
- lead
- winding
- coil
- fault
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000004804 winding Methods 0.000 claims abstract description 106
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 32
- 238000009413 insulation Methods 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 241000209219 Hordeum Species 0.000 claims description 20
- 235000007340 Hordeum vulgare Nutrition 0.000 claims description 20
- 239000011889 copper foil Substances 0.000 claims description 18
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 210000001331 nose Anatomy 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a voltage transformer testing device, which relates to the technical field of electric fault detection, wherein the device comprises: the device comprises an annular iron core, a primary side winding and a secondary side winding, wherein the primary side winding surrounds a first position on one side of the iron core, and two ends of a primary side lead wire forming the primary side winding are led out from the primary side winding; the secondary side winding is wound at a second position on one side of the iron core, which is opposite to the position of the primary side winding, wherein the secondary side winding comprises a plurality of fault coil layers which are sequentially wound on the iron core and are insulated from each other, each fault coil layer is obtained by encircling a preset number of turns on the iron core by a secondary side lead wire, the number of the preset number of turns corresponding to each fault coil layer is different, and two ends of the secondary side lead wire forming the fault coil layer are led out from the secondary side winding. The technical scheme disclosed by the utility model can improve the testing efficiency of the voltage transformer.
Description
Technical Field
The utility model relates to the technical field of electric fault detection, in particular to a voltage transformer testing device.
Background
The voltage transformer is a device for isolating electrical devices such as a measuring instrument from a high-voltage system and performing voltage conversion. The device has the advantages of simple structure, convenient maintenance, reasonable price and the like, is widely applied to the power system, and is an important component of the power system. Therefore, the voltage transformer can be tested to ensure that the voltage transformer can work normally, and the method has important significance on whether the power system can work normally or not.
However, the current means for testing the voltage transformer mainly includes direct current resistance measurement, lightning impulse withstand voltage test, alternating current withstand voltage test, partial discharge measurement test and other test modes. The direct current resistance measurement is suitable for fault diagnosis, and the lightning impulse withstand voltage test belongs to a destructive test and is only carried out when the voltage transformer leaves the factory; the AC withstand voltage test also belongs to destructive test, and too short test period can influence the service life of the voltage transformer, thereby increasing the defect rate of the product. The partial discharge measurement test is an effective means for detecting whether the voltage transformer has defects or not, but the test has strict requirements on electromagnetic environment, and can be effectively developed in a laboratory, so that the test efficiency of the voltage transformer is lower.
Disclosure of Invention
In view of the above, the utility model provides a voltage transformer testing device, which mainly aims to solve the technical problem of low testing efficiency of a voltage transformer.
In order to achieve the above object, the present utility model provides a voltage transformer testing apparatus, comprising:
the iron core is annular;
a primary winding surrounding a first position on one side of the core, wherein both ends of a primary lead constituting the primary winding are led out from the primary winding;
a secondary side winding surrounding a second position on the iron core on a side opposite to the position of the primary side winding,
the secondary side winding comprises a plurality of fault coil layers which are wound on the iron core in sequence and are insulated from each other, each fault coil layer is formed by winding a secondary side lead wire around a preset number of turns at the iron core, the number of the preset turns corresponding to each fault coil layer is different, and two ends of the secondary side lead wire forming the fault coil layer are led out from the secondary side winding.
According to the voltage transformer testing device provided by the utility model, two ends of the primary side lead wire can be connected to an external testing device, such as a pulse testing device and the like, so that the fault-free condition of the voltage transformer can be simulated, two ends of the secondary side lead wire of any fault coil layer can be short-circuited, the condition of short circuit of secondary side wires with different turns in the voltage transformer can be simulated, the insulation condition of the primary winding of the voltage transformer can be judged based on the voltage waveform generated by the external pulse testing device based on the voltage transformer testing device, and the problem of high difficulty in setting turn-to-turn short circuit faults directly in the primary winding is solved; meanwhile, the setting of the number of short-circuit turns can be flexible and changeable according to the selection of fault coil layers with different numbers of turns. The testing efficiency of the voltage transformer is effectively improved.
The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
fig. 1 shows a schematic structural diagram of a voltage transformer testing device according to an embodiment of the present utility model;
fig. 2 shows a schematic structural diagram of a primary coil layer according to an embodiment of the present utility model;
FIG. 3 illustrates a cross-sectional side view of a primary winding provided by an embodiment of the present utility model;
FIG. 4 illustrates a cross-sectional side view of a secondary side winding provided by an embodiment of the present utility model;
FIG. 5 shows a schematic structural diagram of a test stand according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of a lead fixing position according to an embodiment of the present utility model.
Detailed Description
The utility model will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In order to further describe the technical means and effects adopted for achieving the preset aim of the utility model, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the utility model with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Voltage transformer testing apparatus according to some embodiments of the present utility model are described below with reference to fig. 1 to 6.
As shown in fig. 1, a voltage transformer testing apparatus according to an embodiment of the present utility model includes an iron core 100, a primary winding 200, and a secondary winding 300. The test device is used for testing the voltage transformer, wherein the voltage transformer can be a dry voltage transformer.
The iron core 100 is a circular iron core of a cylindrical core body, and may be made of silicon steel sheet, in a shape of a square, and may be divided into a first position and a second position at the center of two opposite long sides of the cylindrical core body.
Further, the primary winding 200 is wound around a first position on one side of the core 100, wherein both ends of a primary lead wire constituting the primary winding 200 are led out from the primary winding 200, and a connection terminal 210 capable of being connected to an external device such as a pulse testing apparatus is formed; the connection between the connection terminal 210 and an external pulse testing device can perform a pulse voltage test on the primary winding 200 based on the pulse testing device to obtain a test voltage waveform, thereby judging the insulation condition of the primary winding of the voltage transformer. The primary side lead can be an enameled wire.
Further, the secondary winding 300 is wound around the core 100 at a second position on the opposite side of the core from the primary winding 200.
The secondary winding 300 includes a plurality of fault coil layers (not shown in the figure) which are sequentially wound on the iron core 100 and are insulated from each other, each fault coil layer is formed by winding a preset number of turns around the iron core by a secondary lead wire, the number of preset turns corresponding to each fault coil layer is different, two ends of the secondary lead wire forming the fault coil layer are led out from the secondary winding 300, a lead terminal 310 capable of being led out of the secondary winding 300 is formed, and 2 lead terminals 310 can be led out from each fault coil layer, wherein the secondary lead wire is an enameled wire.
According to the voltage transformer testing device provided by the embodiment of the utility model, the two ends of the primary side lead can be connected to the external pulse testing device to simulate the fault-free condition, and the two lead terminals of the secondary side lead of any fault coil layer can be short-circuited to simulate the condition of short circuit of the secondary side lead with different turns, and the insulation condition of the primary winding of the voltage transformer can be judged based on the voltage waveform generated by the external pulse testing device based on the voltage transformer testing device, so that the problem of high difficulty in setting turn-to-turn short circuit faults directly in the primary winding is solved; meanwhile, the setting of the number of short-circuit turns can be flexible and changeable according to the selection of fault coil layers with different numbers of turns. The testing efficiency of the voltage transformer is effectively improved.
In one embodiment of the present utility model, optionally, as shown in fig. 2, the primary winding 200 includes a primary coil layer 220, where the primary coil layer 220 is wound by the primary side lead 230 at the first position, where the primary coil layer 220 includes a plurality of coil sub-layers 221 wound in a stacked manner, each of the coil sub-layers 221 includes a plurality of winding layers L, where a projection range of the primary side lead 230 of each of the winding layers L in each of the coil sub-layers 221 projected onto the iron core 100 is not overlapped, and a number of turns of the primary side lead 230 included in each of the coil sub-layers 221 is different.
Specifically, a winding layer L may be formed by winding one primary side lead 230 around a first position with one third of the total number of turns of the coil sub-layer 221 where the primary side lead 230 is located, then winding an insulating protective material such as capacitor paper around the winding layer L, then winding one third of the total number of turns of the coil sub-layer 221 around the insulating protective material at a position offset from the position of the primary side lead 230 in the previous winding layer L, forming a winding layer L by winding one third of the primary side lead 230 of the total number of turns of the coil sub-layer 221 around the winding layer L, winding another winding layer L by winding an insulating protective material such as new capacitor paper around the winding layer L, forming a coil sub-layer 221 from the winding layers L, and forming a primary coil sub-layer 220 based on the winding sub-layers 221 in the above-layer 221. It should be noted that this embodiment provides a method of setting the projection ranges of the primary side lead wire 230 constituting each of the winding layers L in one of the coil sub-layers 221 to the iron core 100 so as not to overlap, and other winding manners capable of achieving the same winding effect are also applicable to this embodiment. Further, the number of coil sub-layers 221 included in the primary coil layer 220 may be determined based on actual conditions, the number of turns included in each coil sub-layer 221 may be different, the included winding layers L may be different, and as an example, if the primary coil layer 220 includes upper, middle, and lower three coil sub-layers 221, the upper coil sub-layer 221 may include 9 winding layers L, each winding layer L may include 99 turns of coils, the coil sub-layer 221 may include 8 winding layers L, each winding layer L may include 78 turns of coils, the lower coil sub-layer 221 may include 7 winding layers L, each winding layer L may include 60 turns of coils, and a specific arrangement form may be determined according to actual conditions.
In the above embodiment, based on the above arrangement form of the primary coil layer, the number of turns of the primary coil layer can be increased, the current of the primary side lead can be reduced, the aging speed of the primary coil layer can be reduced, and the durability of the voltage transformer testing device can be improved.
In one embodiment of the present utility model, optionally, as shown in fig. 3, fig. 3 gives a cross-sectional side view of the primary side winding, wherein the primary side winding 200 further comprises a primary coil insulation former and a primary coil insulation layer.
The primary coil insulation framework comprises a first highland barley paper layer 241, a first electrical adhesive tape layer 242 and a first capacitor paper layer 243 which are wound at the first position. Specifically, the first highland barley paper layer 241 is obtained by winding a first preset number of layers of highland barley paper at a first position of the iron core 100, the first electrical tape layer 242 is obtained by winding a second preset number of layers of electrical tape on the first highland barley paper layer 241, and the first capacitor paper 243 is obtained by winding a third preset number of layers of capacitor paper on the electrical tape layer 242; the number of the first preset layer number, the second preset layer number and the third preset layer number is different, and specific layer number setting can be determined based on actual conditions. As an example, the primary coil insulation bobbin may be disposed at a middle position of one end long side of the core 100, the first highland barley paper layer 241 may be composed of 3 layers of highland barley paper, the first electrical tape layer 242 may be composed of 1 layer of electrical tape, and the first capacitor paper layer 243 may be 4 layers of capacitor paper.
Further, the primary coil layer 220 is wound on a primary coil insulation bobbin of the first position, a primary coil insulation layer is wound on the primary coil layer 220 of the first position, the primary coil insulation layer includes a first copper foil layer 251 and a second capacitor paper layer 252, wherein the first copper foil layer 251 is composed of copper foil wound on the primary coil layer, and the second capacitor paper layer 252 is composed of capacitor paper wound around the first copper foil layer 251. As an example, the first copper foil layer 251 may be wound from 1 copper foil, and the second capacitor paper layer 252 may be wound from two capacitor papers. In the above embodiment, the aging resistance and durability of the primary side winding can be improved based on the winding arrangement of the primary side winding.
In one embodiment of the present utility model, optionally, the secondary side winding further includes a secondary coil insulation bobbin, as shown in fig. 4, including a second highland barley paper layer 331, a second electrical tape layer 332, and a third capacitor paper layer 333 wound at the second position.
The second highland barley paper layer 331 is obtained by winding highland barley paper with a fourth preset layer number at the second position, the second electrical tape layer 332 is obtained by winding electrical tape with a fifth preset layer number on the second highland barley paper layer 331, the third capacitor paper layer 333 is obtained by winding capacitor paper with a sixth preset layer number on the second electrical tape layer 332, and the numbers of the fourth preset layer number, the fifth preset layer number and the sixth preset layer number are different. As an example, the second highland barley paper layer 331 may be wound with 2 layers of highland barley paper, the second electrical tape layer 332 may be wound with 1 layer of electrical tape, and the third capacitor paper layer 333 may be wound with three layers of capacitor paper. In the above embodiment, the anti-aging capability and durability of the secondary coil insulation bobbin can be improved based on the winding arrangement manner of the secondary coil insulation bobbin.
In one embodiment of the present utility model, optionally, the secondary side lead is an enameled wire, further, as shown in fig. 4, the plurality of fault coil layers includes a first fault coil layer 341, a second fault coil layer 342, and a third fault coil layer 343.
Wherein the first fault coil layer 341 is wound on the secondary coil insulation skeleton at the second position, and both ends of the secondary side lead of the first fault coil layer 341 include a first lead terminal and a second lead terminal; the second fault coil layer 342 is wound on the first fault coil layer 341 at the second position, both ends of the secondary side lead of the second fault coil layer 342 include a third lead terminal and a fourth lead terminal; the third fault coil layer 343 is wound on the second fault coil layer 342 at the second position, and both ends of the secondary side lead of the third fault coil layer 343 include a fifth lead terminal and a sixth lead terminal. Further, the first fault coil layer 341, the second fault coil layer 342, and the third fault coil layer 343 are wound with secondary side leads having different numbers of turns, respectively. Further, the number of turns of the first fault coil layer 341 is greater than the number of turns of the second fault coil layer 342, and the number of turns of the second fault coil layer 342 is greater than the number of turns of the third fault coil layer 343. As an example, the number of turns of the first fault coil layer may be 30 turns, the number of turns of the second fault coil layer may be 20 turns, the number of turns of the third fault coil layer may be 10 turns, and the specific number of turns selection may be determined based on practical circumstances.
In the above embodiment, the two lead terminals of the secondary side lead wire of any one fault coil layer can be short-circuited to simulate the condition of short circuit of the secondary side coil with different turns, so that the problem of high difficulty in setting turn-to-turn short circuit faults directly in the primary winding is solved, the setting of the number of short circuit turns is flexible and changeable according to the selection of the fault coil layers with different turns, and the testing efficiency of the voltage transformer is effectively improved.
In one embodiment of the present utility model, optionally, as shown in fig. 4, the secondary side winding further includes a secondary coil insulation layer, wherein the secondary coil insulation layer is wound on the third fault coil layer 343 at the second position, the secondary coil insulation layer includes a second copper foil layer 351 and a fourth capacitor paper layer 352, wherein the second copper foil layer 351 is composed of copper foil wound on the third fault coil layer 343, and the fourth capacitor paper layer 352 is composed of capacitor paper wound around the second copper foil layer 351. In the embodiment, the secondary coil insulating layer has good flexibility, certain mechanical strength and high insulating resistance value, is small in loss of electromagnetic waves, and can effectively prevent mutual contact between metal conductors.
In one embodiment of the present utility model, optionally, the voltage transformer testing apparatus further includes a testing stand, as shown in fig. 5, wherein the testing stand 400 is used for being connected to the voltage transformer testing apparatus, and includes a plurality of lead fixing bits 410 and an insulating stand 420, and the lead fixing bits 410 are fixed on the insulating stand 420. Wherein, each of the lead fixing bits 410 is used for connecting one end (not shown in the figure) of a secondary side lead in a fault coil layer of the voltage transformer testing device, so that two ends of each secondary side lead in the voltage transformer testing device are correspondingly provided with the lead fixing bits 410.
Further, as shown in fig. 6, each of the lead fixing bits 410 includes a nut 411, a male and female screw 412, and a bolt 413, wherein the nut 411 is used to fix one end (not shown) of the secondary side lead of the fault coil layer at the male screw of the male and female screw 411, and the bolt 413 is used to fix an external lead (not shown) at the male and female screw 412. In practical use, the insulating layer at one end of the secondary side lead may be removed, and one end of the treated secondary side lead may be fixed to the male screw of the female screw 412 by the nut 411, and the position of the female screw 412 may be fixed by the insulating bracket. Further, the insulating layer at the other end of the secondary side lead of the same fault coil layer may be removed, the other end of the processed secondary side lead may be fixed to the male screw of the female screw 412 by the nut 411 of the other lead fixing bit 410, and the position of the female screw 412 may be fixed by an insulating bracket. Subsequently, a number of wires (not shown in the drawings) may be prepared, and both ends of the wires may be pressed against the copper nose. Further, copper noses at two ends of the wire are fixedly connected through bolts 413 and male and female screws 412 corresponding to the two lead fixing positions 410, and a short-circuit coil is formed at the fault coil layer to simulate the situation of turn-to-turn short-circuit fault. In the embodiment of the utility model, male and female screws with different lead fixing positions are connected through the lead wires, the fault coil layers with different turns are short-circuited to form faults with different short-circuited turns, so that the primary winding composition of the voltage transformer can be detected through a pulse voltage method, and the efficiency of testing the primary winding of the dry voltage transformer is improved.
In one embodiment of the present utility model, optionally, the plurality of lead fixtures includes a first lead fixture, a second lead fixture, a third lead fixture, a fourth lead fixture, a fifth lead fixture, and a sixth lead fixture.
The first lead fixing position is used for being connected with the first lead end, the second lead fixing position is used for being connected with the second lead end, the third lead fixing position is used for being connected with the third lead end, the fourth lead fixing position is used for being connected with the fourth lead end, the fifth lead fixing position is used for being connected with the fifth lead end, and the sixth lead fixing position is used for being connected with the sixth lead end.
Further, the first lead fixing position, the second lead fixing position, the third lead fixing position, the fourth lead fixing position, the fifth lead fixing position and the sixth lead fixing position are respectively used for being connected with one terminal of the external lead. In actual use, if the number of turns of the first fault coil layer is 30 turns, the number of turns of the second fault coil layer is 20 turns, and the number of turns of the third fault coil layer is 10 turns, the first lead end of the first fault coil layer is connected to the first lead fixture, the second lead end of the first fault coil layer is connected to the second lead fixture, the third lead end of the second fault coil layer is connected to the third lead fixture, the fourth lead end of the second fault coil layer is connected to the fourth lead fixture, the fifth lead end of the third fault coil layer is connected to the fifth lead fixture, and the sixth lead end of the third fault coil layer is connected to the sixth lead fixture. If the number of turns of the short circuit of the dry voltage transformer is required to be set to be 10 turns, connecting a fifth lead fixing position and a sixth lead fixing position based on a lead, and enabling a fifth lead end to be in short circuit with a sixth lead end; if the number of short-circuit turns of the dry voltage transformer is required to be set to be 10 turns plus 20 turns, connecting the third lead fixing position and the fourth lead fixing position based on a wire, and connecting the fifth lead fixing position and the sixth lead fixing position based on the wire, so that the third lead end and the fourth lead end are short-circuited, and the fifth lead end and the sixth lead end are short-circuited; if the number of short-circuit turns of the dry voltage transformer is required to be set to be 30 turns, the first lead fixing position and the second lead fixing position are connected based on a lead, and the first lead end and the second lead end are in short circuit. At this time, a pulse voltage test can be performed on the primary winding based on a pulse test device connected to the primary winding to obtain a test voltage waveform, thereby judging the insulation condition of the primary winding of the voltage transformer.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A voltage transformer testing device, characterized in that the voltage transformer testing device comprises:
the iron core is annular;
a primary winding surrounding a first position on one side of the core, wherein both ends of a primary lead constituting the primary winding are led out from the primary winding;
a secondary side winding surrounding a second position on the iron core on a side opposite to the position of the primary side winding,
the secondary side winding comprises a plurality of fault coil layers which are wound on the iron core in sequence and are insulated from each other, each fault coil layer is formed by winding a secondary side lead wire around a preset number of turns at the iron core, the number of the preset turns corresponding to each fault coil layer is different, and two ends of the secondary side lead wire forming the fault coil layer are led out from the secondary side winding.
2. The apparatus of claim 1, wherein the primary winding comprises:
the primary coil layer is obtained by winding the primary side lead wire at the first position, wherein the primary coil layer comprises a plurality of coil sub-layers which are sequentially overlapped and wound, each coil sub-layer comprises a plurality of winding layers, the projection range of the primary side lead wire forming each winding layer projected to the iron core is not overlapped, and the number of turns formed by the primary side lead wire contained in each coil sub-layer is different.
3. The apparatus of claim 2, wherein the primary winding further comprises:
the primary coil insulation framework comprises a first highland barley paper layer, a first electrical adhesive tape layer and a first capacitor paper layer which are wound at the first position;
the first highland barley paper layer is obtained by winding highland barley paper with a first preset layer number at the first position, the first electrician tape layer is obtained by winding electrician adhesive tapes with a second preset layer number on the first highland barley paper layer, the first capacitor paper layer is obtained by winding capacitor paper with a third preset layer number on the electrician tape layer, and the numbers of the first preset layer number, the second preset layer number and the third preset layer number are different;
the primary coil layer is wound on the primary coil insulation skeleton at the first position.
4. The apparatus of claim 3, wherein the primary winding further comprises:
the primary coil insulation layer is wound on the primary coil layer at the first position, and comprises a first copper foil layer and a second capacitor paper layer, wherein the first copper foil layer is formed by copper foil wound on the primary coil layer, and the second capacitor paper layer is formed by capacitor paper wound on the first copper foil layer.
5. The apparatus of any one of claims 1 to 4, wherein the secondary side winding comprises:
the secondary coil insulation framework comprises a second highland barley paper layer, a second electrical adhesive tape layer and a third capacitor paper layer which are wound at the second position;
the second highland barley paper layer is obtained by winding highland barley paper with a fourth preset layer number at the second position, the second electrical tape layer is obtained by winding electrical tape with a fifth preset layer number on the second highland barley paper layer, the third capacitor paper layer is obtained by winding capacitor paper with a sixth preset layer number on the second electrical tape layer, and the fourth preset layer number, the fifth preset layer number and the sixth preset layer number are different in number.
6. The apparatus of claim 5, wherein the secondary side lead is an enameled wire; the plurality of fault coil layers includes a first fault coil layer, a second fault coil layer, and a third fault coil layer;
the first fault coil layer is wound on the secondary coil insulation framework at the second position, and two ends of the secondary side lead of the first fault coil layer comprise a first lead end and a second lead end;
the second fault coil layer is wound on the first fault coil layer at the second position, and two ends of the secondary side lead of the second fault coil layer comprise a third lead end and a fourth lead end;
the third fault coil layer is wound on the second fault coil layer at the second position, and both ends of the secondary side lead of the third fault coil layer include a fifth lead terminal and a sixth lead terminal.
7. The apparatus of claim 6, wherein the secondary side winding further comprises:
the secondary coil insulation layer is wound on the third fault coil layer at the second position, and comprises a second copper foil layer and a fourth capacitor paper layer, wherein the second copper foil layer is formed by copper foil wound on the third fault coil layer, and the fourth capacitor paper layer is formed by capacitor paper wound on the second copper foil layer.
8. The apparatus of claim 6, wherein the number of turns of the first fault coil layer is greater than the number of turns of the second fault coil layer, the number of turns of the second fault coil layer being greater than the number of turns of the third fault coil layer.
9. The apparatus of claim 8, further comprising a test rack; the test support comprises an insulating support and a plurality of lead fixing positions;
each lead fixing position comprises a nut, a male screw, a female screw and a bolt, wherein the nut is used for fixing one end of a secondary side lead of the fault coil layer at the external thread of the male screw and the female screw, and the bolt is used for fixing an external lead at the male screw and the female screw so that the lead can be conducted with the secondary side lead.
10. The apparatus of claim 9, wherein the plurality of lead fixtures comprises a first lead fixture, a second lead fixture, a third lead fixture, a fourth lead fixture, a fifth lead fixture, and a sixth lead fixture;
the first lead fixing position is used for being connected with the first lead end, the second lead fixing position is used for being connected with the second lead end, the third lead fixing position is used for being connected with the third lead end, the fourth lead fixing position is used for being connected with the fourth lead end, the fifth lead fixing position is used for being connected with the fifth lead end, and the sixth lead fixing position is used for being connected with the sixth lead end;
the first lead fixing position, the second lead fixing position, the third lead fixing position, the fourth lead fixing position, the fifth lead fixing position and the sixth lead fixing position are respectively used for being connected with one terminal of the external lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321072247.5U CN219625683U (en) | 2023-05-06 | 2023-05-06 | Voltage transformer testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321072247.5U CN219625683U (en) | 2023-05-06 | 2023-05-06 | Voltage transformer testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219625683U true CN219625683U (en) | 2023-09-01 |
Family
ID=87774243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321072247.5U Withdrawn - After Issue CN219625683U (en) | 2023-05-06 | 2023-05-06 | Voltage transformer testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219625683U (en) |
-
2023
- 2023-05-06 CN CN202321072247.5U patent/CN219625683U/en not_active Withdrawn - After Issue
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016045385A1 (en) | Combined electrical appliance of multiple set of capacitive screen insulating core | |
| CN102156242B (en) | Method for testing transformer insulation combination | |
| WO2015180002A1 (en) | Apparatus for judging failure of iron core and clamping part of ultra-high voltage electric reactor, and processing and eliminating same online | |
| JP2005241297A (en) | Withstand voltage test method of power equipment | |
| CN219625683U (en) | Voltage transformer testing device | |
| RU2396661C1 (en) | Measuring device of differential current protection of buses | |
| CN112748312A (en) | SF6 gas-insulated metal enclosed complete set AC voltage-withstand and partial discharge test device | |
| CN101871960A (en) | Test method of transformer | |
| CN110890201B (en) | Three-phase shunt reactor lead wire connection structure | |
| Jacob et al. | Online partial discharge measurement of a high-voltage direct current converter wall-bushing | |
| CN110716111A (en) | Ultrahigh-voltage XLPE cable insulation online monitoring device and method based on vector method | |
| CA2816373C (en) | Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment | |
| CN113517084B (en) | Direct-current high-voltage blocker type cable and direct-current high-voltage trial delivery test system | |
| Trotsenko et al. | Partial discharge as threat to insulation of high voltage direct current transmissions | |
| WO2009021390A1 (en) | A detection device of shunt lead and a detection method thereof | |
| CN213517514U (en) | Reactor turn-to-turn insulation detection sensor and reactor turn-to-turn insulation detection device | |
| CN211014528U (en) | Ultrahigh-voltage X L PE cable insulation online monitoring device based on vector method | |
| Yao et al. | AC partial discharge measurements of aged cast resin transformers after multiple impulse voltage applications | |
| CN201465783U (en) | Power current transformer with temperature rise detecting function | |
| CN210294459U (en) | Experimental mould for reactor turn-to-turn mixed insulation defect | |
| JP5527469B1 (en) | Dielectric strength test method for gas insulated switchgear and gas insulated instrument transformer used therefor | |
| CN110828127A (en) | High-frequency micro-electric protection mutual inductor | |
| Ye et al. | Insulation characteristics of deformed transformer winding under transient impulse | |
| CN214122284U (en) | Experimental arrester insulation fixed bolster and arrester electrical test device of using | |
| CN109613387B (en) | Winding intertwist short circuit simulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20230901 Effective date of abandoning: 20231201 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20230901 Effective date of abandoning: 20231201 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |