CN117347806A - Partial discharge testing assembly for GIS equipment - Google Patents
Partial discharge testing assembly for GIS equipment Download PDFInfo
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- CN117347806A CN117347806A CN202311566075.1A CN202311566075A CN117347806A CN 117347806 A CN117347806 A CN 117347806A CN 202311566075 A CN202311566075 A CN 202311566075A CN 117347806 A CN117347806 A CN 117347806A
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- partial discharge
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- gis
- sensor
- basin
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 239000012212 insulator Substances 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000001012 protector Effects 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 210000001503 joint Anatomy 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a partial discharge testing assembly for GIS equipment, and belongs to the technical field of partial discharge testing groups. The partial discharge testing assembly for the GIS equipment comprises a basin-type insulator, wherein an annular metal auxiliary electrode is arranged in the basin-type insulator, and a threaded hole is formed in the outer annular wall of the basin-type insulator along the radial direction; the detection module comprises an ultrahigh frequency sensor, an N-type three-way joint and an overvoltage protector, wherein the overvoltage protector is connected with a first joint of the N-type three-way joint, an N-type female joint of the ultrahigh frequency sensor is connected with a second joint of the N-type three-way joint, one end of the ultrahigh frequency sensor is connected with the threaded hole, and the bottom of the ultrahigh frequency sensor is in butt joint with the annular metal auxiliary electrode. The invention reliably detects the partial discharge signal in the GIS equipment, meets the requirements of the availability and coverage of GIS partial discharge on-line monitoring, and improves the reliability and accuracy of detection.
Description
Technical Field
The invention relates to the technical field of partial discharge testing, in particular to a partial discharge testing assembly for GIS equipment.
Background
The basin-type insulators of many Shanghai Si source 220kV GIS devices are provided with metal shielding rings, partial discharge test windows are reserved, the size of the partial discharge test windows is limited by electric field distribution, and the reserved apertures are smaller. The internal discharge signal should be able to be coupled in during operation. According to the detection frequency band definition of the technical specification of partial discharge ultrahigh frequency detection of the gas insulated metal-enclosed switchgear of DL/T1630-2016 of the industry standard: the frequency band of the GIS partial discharge ultrahigh frequency detection is preferably 300 MHz-1500 MHz. But in this band the partial discharge signal decays very fast and the signal is very weak. According to theoretical calculation, the size of the local discharge test window of the main bus basin is 55X30mm, the sizes of other basins are 45X20mm, and the theoretical calculation value of the lower limit cut-off frequency of the partial discharge test window is 1667MHz. The ultra-high frequency signal with the frequency of 1600MHz can only be radiated through the partial discharge test window of the thinking source GIS basin, and the GIS on-line monitoring device installed at present has the advantages of weak signal, rapid attenuation and reduced detection accuracy.
For this reason, it is desirable to provide a partial discharge test assembly for a GIS device to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a partial discharge testing component for GIS equipment, which can reliably detect partial discharge signals in the GIS equipment in a specified frequency band, meet the requirements of availability and coverage of GIS partial discharge on-line monitoring and improve the reliability and accuracy of detection.
In order to achieve the above object, the following technical scheme is provided:
a partial discharge test assembly for a GIS device, comprising:
the basin-type insulator is internally provided with an annular metal auxiliary electrode, and the outer annular wall of the basin-type insulator is radially provided with a threaded hole;
the detection module comprises an ultrahigh frequency sensor, an N-type three-way joint and an overvoltage protector, wherein the overvoltage protector is connected with a first joint of the N-type three-way joint, an N-type female joint of the ultrahigh frequency sensor is connected with a second joint of the N-type three-way joint, one end of the ultrahigh frequency sensor is connected with the threaded hole, and the bottom of the ultrahigh frequency sensor is in butt joint with the annular metal auxiliary electrode.
As an alternative scheme of the partial discharge testing component for the GIS equipment, the detection frequency band of the ultrahigh frequency sensor is 300 MHz-1500 MHz.
As an alternative scheme for the partial discharge test assembly of GIS equipment, the ultrahigh frequency sensor comprises a sensor body with a shell and a grounding screw, wherein the grounding screw is in threaded connection with a threaded hole of the basin-type insulator, the lower end of the sensor body is arranged in the grounding screw in a penetrating mode, and a fastener is used for penetrating through the shell and connected with the grounding screw.
As an alternative to the partial discharge test assembly for GIS devices, the fasteners are stainless steel screws.
As an alternative scheme of the partial discharge testing assembly for the GIS equipment, the lower end of the sensor body is provided with a thread section, and the thread section is in threaded connection with the annular metal auxiliary electrode.
As an alternative scheme of the partial discharge testing component for GIS equipment, the thread section is made of metallic copper.
As an alternative scheme of the partial discharge test assembly for the GIS equipment, insulating epoxy resin is arranged between the grounding screw and the sensor body.
As an alternative scheme of the partial discharge testing assembly for GIS equipment, the ultrahigh frequency sensor further comprises a sealing ring, and the sealing ring is sleeved on the outer wall surface of the grounding screw.
As an alternative scheme of a partial discharge testing assembly for GIS equipment, a plurality of detection modules are arranged, a plurality of threaded holes are circumferentially formed in the outer annular wall of the basin-type insulator at intervals, and a plurality of detection modules are correspondingly arranged at the plurality of threaded holes.
As an alternative scheme of the partial discharge testing component for the GIS equipment, the partial discharge testing component further comprises signal processing equipment, wherein the signal processing equipment is connected with the third connector of the N-type three-way connector through a coaxial cable, and the signal processing equipment is an oscilloscope or a partial discharge detector.
Compared with the prior art, the invention has the beneficial effects that:
according to the partial discharge testing assembly for the GIS equipment, the basin-type insulator is used for adapting the GIS equipment, the annular metal auxiliary electrode is embedded in the basin-type insulator, the threaded hole is formed in the outer annular wall of the basin-type insulator, one end of the ultrahigh frequency sensor is connected with the threaded hole, the bottom of the ultrahigh frequency sensor is abutted to the annular metal auxiliary electrode, and partial discharge signals in the GIS equipment are conveniently led out. The N-type three-way connector is used for connecting a coaxial cable and monitoring partial discharge signals. The overvoltage protector is used for ensuring that the auxiliary electrode keeps the power frequency grounded. After the annular metal auxiliary electrode in the basin-type insulator is connected, the partial discharge signal in the GIS equipment can be detected in the frequency range of 300 MHz-1500 MHz, and compared with an external sensor arranged on the GIS basin, the sensor has the characteristics of high sensitivity and direct replacement, meets the requirements of the GIS partial discharge on-line monitoring on the effectiveness and coverage, and improves the reliability and accuracy of detection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
Fig. 1 is an assembly schematic diagram of a first view angle of a partial discharge testing assembly for GIS devices according to an embodiment of the present invention;
fig. 2 is an assembly schematic diagram of a second view angle of a partial discharge testing assembly for GIS devices according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a detection module according to an embodiment of the present invention;
FIG. 4 is an exploded view of a detection module according to an embodiment of the present invention;
fig. 5 is an explosion diagram of an uhf sensor according to an embodiment of the invention.
Reference numerals:
100. a detection module; 200. basin-type insulator; 201. a threaded hole; 202. an annular metal auxiliary electrode; 300. a coaxial cable;
1. an ultrahigh frequency sensor; 2. an N-type three-way joint; 3. an overvoltage protector;
11. a sensor body; 111. an N-type female head; 112. a housing; 113. a threaded section; 12. a grounding screw; 13. an insulating epoxy resin; 14. a seal ring; 15. stainless steel screw.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In order to reliably detect a partial discharge signal in a GIS device within a specified frequency band, meet the requirements of availability and coverage of GIS partial discharge on-line monitoring, and improve the reliability and accuracy of detection, the embodiment provides a partial discharge testing component for the GIS device, and the specific contents of the embodiment are described in detail below with reference to fig. 1 to 5.
Example 1
The partial discharge test assembly for the GIS equipment comprises a basin-type insulator 200 and a detection module 100. Wherein, annular metal auxiliary electrode 202 is arranged in basin-type insulator 200, and screw hole 201 is radially opened on the outer annular wall of basin-type insulator 200. The detection module 100 comprises an ultrahigh frequency sensor 1, an N-type three-way joint 2 and an overvoltage protector 3, wherein the overvoltage protector 3 is connected with a first joint of the N-type three-way joint 2, an N-type female joint 111 of the ultrahigh frequency sensor 1 is connected with a second joint of the N-type three-way joint 2, one end of the ultrahigh frequency sensor 1 is connected with a threaded hole 201, and the bottom of the ultrahigh frequency sensor 1 is abutted with an annular metal auxiliary electrode 202. The annular metal auxiliary electrode 202 is used to compensate, even out electrostatic distribution and eliminate cavitation effects in the external structure of the GIS basin-type insulator 200.
Preferably, the detection frequency band of the ultrahigh frequency sensor 1 is 300 MHz-1500 MHz, the characteristics of easy modification are provided, the requirements of the GIS partial discharge on-line monitoring on the effectiveness and coverage can be met only by replacing the sensor, the reliability and accuracy of the device detection are improved, no additional sensor, an acquisition unit box and a rearranged cable are required, and the device can be installed at a site with the same conditions, so that the purposes of saving maintenance cost and improving the reliability of data are achieved.
In short, according to the partial discharge testing assembly for the GIS equipment provided by the invention, the basin-type insulator 200 is used for adapting the GIS equipment, wherein the annular metal auxiliary electrode 202 is embedded in the basin-type insulator 200, the threaded hole 201 is formed in the outer annular wall of the basin-type insulator 200, one end of the ultrahigh frequency sensor 1 is connected with the threaded hole 201, the bottom of the ultrahigh frequency sensor 1 is abutted with the annular metal auxiliary electrode 202, and partial discharge signals in the GIS equipment are conveniently led out. The N-type tee connector 2 is used to connect the coaxial cable 300 and monitor the partial discharge signal. The overvoltage protector 3 is used for ensuring that the auxiliary electrode keeps the power frequency grounded. After the annular metal auxiliary electrode 202 in the basin-type insulator 200 is connected, the partial discharge signal in the GIS equipment can be detected in the frequency band of 300 MHz-1500 MHz, and compared with an external sensor installed in the GIS basin, the sensor has the characteristics of high sensitivity and direct replacement. The method meets the requirements of GIS partial discharge on-line monitoring on effectiveness and coverage, and improves the reliability and accuracy of detection.
Further, the ultrahigh frequency sensor 1 comprises a sensor body 11 with a shell 112 and a grounding screw 12, wherein the grounding screw 12 is in threaded connection with a threaded hole 201 of the basin-type insulator 200, the lower end of the sensor body 11 is arranged in the grounding screw 12 in a penetrating manner, and the sensor body is connected with the grounding screw 12 through the shell 112 by adopting a fastening piece. Optionally, an O-ring seal is provided between the contact surface of the housing 112 and the ground screw 12 to seal, accommodating pressures of-1 Bar to 10Bar.
In the present embodiment, the sensor body 11 does not use any electronic device such as a resistor or a capacitor, and has a high detection band bandwidth, so that the ultrahigh frequency partial discharge signal can be detected in the range of 300MHz to 1500MHz. Preferably, the fastener is a stainless steel screw 15. Adopt 4 stainless steel screws 15 to link together sensor body 11 and ground screw 12, ground screw 12 passes through the screw thread of self outer wall surface and the screw hole 201 spiro union of basin insulator 200, firmly installs ultrahigh frequency sensor 1 on basin insulator 200, and ground screw 12 still can avoid the gaseous follow screw hole 201 of SF6 to escape in the GIS equipment after being connected with basin insulator 200.
Furthermore, the uhf sensor 1 further comprises a sealing ring 14, and the sealing ring 14 is sleeved on the outer wall surface of the grounding screw 12. When the ultrahigh frequency sensor 1 is mounted on the basin-type insulator 200, the sealing ring 14 is clamped between the outer annular wall of the basin-type insulator 200 and the grounding screw 12, so that the tightness of the partial discharge testing assembly is improved. The installation of the ultrahigh frequency sensor 1 can not cause GIS electric field distortion and endanger the safety of the body.
Further, the lower end of the sensor body 11 is provided with a screw thread section 113, and the screw thread section 113 is screwed with the annular metal auxiliary electrode 202. Specifically, the annular metal auxiliary electrode 202 is provided with a connecting hole, so that the threaded section 113 of the sensor body 11 is conveniently connected with the annular metal auxiliary electrode 202, and accurate detection of the partial discharge signal is ensured. Preferably, the material of the thread segments 113 is metallic copper. Further, an insulating epoxy resin 13 is arranged between the grounding screw 12 and the sensor body 11, so that gas is prevented from escaping from a gap between the grounding screw 12 and the sensor body 11. The ultrahigh frequency sensor 1 has the characteristics of strong coupling capability and high sensitivity with the ultrahigh frequency partial discharge signal of GIS equipment, and can monitor the weak partial discharge signal more quickly.
Illustratively, the detecting module 100 is provided with a plurality of threaded holes 201 circumferentially spaced from the outer circumferential wall of the basin-type insulator 200, and the detecting modules 100 are correspondingly provided at the plurality of threaded holes 201. In this embodiment, three threaded holes 201 are circumferentially arranged at intervals on the outer circumferential wall of the basin-type insulator 200, and one detection module 100 is installed at each threaded hole 201, so that the accuracy of partial discharge testing is improved conveniently by installing the detection modules 100 at different test points.
In summary, the detection module 100 is equivalent to an antenna installed at the basin-type insulator 200, the uhf sensor 1 of the detection module 100 is an uhf signal adapter connected to the antenna, and the combination of the adapter and the ring-shaped metal auxiliary electrode 202 forms an uhf partial discharge sensor at the position of the basin-type insulator 200, and fully considers uhf impedance matching, signal attenuation, sealing, insulation and grounding safety.
In one embodiment, the detection module 100 takes a grounding point of the annular metal auxiliary electrode 202 as a connection point of the ultrahigh frequency sensor 1, and is connected with the coaxial cable 300 after being grounded at the power frequency to be used as an ultrahigh frequency partial discharge sensor to monitor a partial discharge signal.
In one embodiment, the detection module 100 can make the generated uhf electromagnetic wave propagate to a far distance along the pipe body of the GIS device when the partial discharge phenomenon exists, and according to the characteristic that the pipe body structure of the GIS device is similar to a waveguide, attenuation of the uhf electromagnetic wave generated during propagation is reduced, and the uhf electromagnetic wave can propagate to a far distance.
Example two
The present embodiment provides a partial discharge test assembly, and compared with the first embodiment, the basic structure of the partial discharge test assembly provided in the present embodiment is the same as that of the first embodiment, and only the arrangement of the signal processing device is added, so that the present embodiment does not describe the same structure as that of the first embodiment.
Further, the partial discharge testing assembly in this embodiment further includes a signal processing device, and the signal processing device is connected to the third connector of the N-type three-way connector 2 through the coaxial cable 300. The signal processing device is illustratively an oscilloscope or a partial discharge detector, and is capable of converting the acquired partial discharge signal into an image or audio signal. And displaying the spectrum characteristics of the partial discharge signal through an oscilloscope or a partial discharge detector.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A test module is put in office for GIS equipment, its characterized in that includes:
the basin-type insulator (200) is internally provided with an annular metal auxiliary electrode (202), and the outer annular wall of the basin-type insulator (200) is radially provided with a threaded hole (201);
detection module (100), including superfrequency sensor (1), N type three way connection (2) and overvoltage protection ware (3), overvoltage protection ware (3) with the first joint connection of N type three way connection (2), the female head of N type (111) of superfrequency sensor (1) with the second joint connection of N type three way connection (2), the one end of superfrequency sensor (1) with screw hole (201) are connected, just the bottom of superfrequency sensor (1) with annular metal auxiliary electrode (202) butt.
2. The partial discharge testing assembly for GIS equipment according to claim 1, wherein the detection frequency band of the ultrahigh frequency sensor (1) is 300-1500 MHz.
3. The partial discharge test assembly for GIS equipment according to claim 1, wherein the ultrahigh frequency sensor (1) comprises a sensor body (11) with a shell (112) and a grounding screw (12), the grounding screw (12) is in threaded connection with a threaded hole (201) of the basin-type insulator (200), the lower end of the sensor body (11) is arranged in the grounding screw (12) in a penetrating mode, and a fastener is adopted to penetrate through the shell (112) to be connected with the grounding screw (12).
4. A partial discharge test assembly for a GIS device according to claim 3, wherein the fastener is a stainless steel screw (15).
5. A partial discharge testing assembly for GIS equipment according to claim 3, characterized in that the lower end of the sensor body (11) is provided with a threaded section (113), the threaded section (113) being screwed with the annular metal auxiliary electrode (202).
6. The partial discharge testing assembly for GIS devices according to claim 5, wherein the threaded section (113) is made of metallic copper.
7. The partial discharge test assembly for GIS equipment according to claim 5, wherein an insulating epoxy resin (13) is provided between the ground screw (12) and the sensor body (11).
8. The partial discharge testing assembly for GIS equipment according to claim 7, wherein the ultrahigh frequency sensor (1) further comprises a sealing ring (14), and the sealing ring (14) is sleeved on the outer wall surface of the grounding screw (12).
9. The partial discharge test assembly for the GIS equipment according to claim 1, wherein a plurality of detection modules (100) are arranged, a plurality of threaded holes (201) are circumferentially arranged on the outer annular wall of the basin-type insulator (200) at intervals, and a plurality of detection modules (100) are correspondingly arranged at the plurality of threaded holes (201).
10. The partial discharge test assembly for a GIS device according to any one of claims 1-9, further comprising a signal processing device connected to the third connector of the N-type three-way connector (2) by a coaxial cable (300), the signal processing device being an oscilloscope or a partial discharge detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311566075.1A CN117347806A (en) | 2023-11-22 | 2023-11-22 | Partial discharge testing assembly for GIS equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311566075.1A CN117347806A (en) | 2023-11-22 | 2023-11-22 | Partial discharge testing assembly for GIS equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117347806A true CN117347806A (en) | 2024-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311566075.1A Pending CN117347806A (en) | 2023-11-22 | 2023-11-22 | Partial discharge testing assembly for GIS equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117347806A (en) |
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2023
- 2023-11-22 CN CN202311566075.1A patent/CN117347806A/en active Pending
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