CN113866624A - GIS partial discharge live-line testing device - Google Patents
GIS partial discharge live-line testing device Download PDFInfo
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- CN113866624A CN113866624A CN202111137009.3A CN202111137009A CN113866624A CN 113866624 A CN113866624 A CN 113866624A CN 202111137009 A CN202111137009 A CN 202111137009A CN 113866624 A CN113866624 A CN 113866624A
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- 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
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- 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
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- 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
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a GIS partial discharge live-line test device, which relates to the technical field of GIS discharge test, and is characterized in that a test box body can be fixed on a GIS insulator to be tested through a fixing component, so that manual holding of a sensor for testing is omitted, meanwhile, an epoxy resin plate is correspondingly attached to a pouring hole of the GIS insulator to be tested, a sensor interface is correspondingly arranged with the position of the pouring hole, an input port of the sensor is matched with the structure of the sensor interface, an ultrahigh frequency sensor can be ensured to be closely attached to the pouring hole, the loss of electromagnetic waves in the GIS when the electromagnetic waves radiate outwards is reduced, the ultrahigh frequency sensor can receive all signals conveniently, the test accuracy is improved, and the test efficiency is also improved; and an epoxy resin plate is adopted, so that the risk of reduction of the insulation strength of the basin-type insulator is reduced.
Description
Technical Field
The invention relates to the technical field of GIS discharge testing, in particular to a GIS partial discharge live-line testing device.
Background
At present, Gas Insulated Switchgear (GIS) is widely applied to power systems by virtue of its advantages of good insulation, high reliability, small occupied space, and the like. In the complex environment of high temperature and high pressure of an electric power system or the manufacturing, transportation and assembly processes of the GIS, some potential safety hazards are inevitably generated, such as dust, conductive particles, metal tips, air gaps and the like, and various forms of partial discharge can be caused. Partial discharge does not immediately result in breakdown of the whole insulation, but the damage to the insulation medium is extremely serious, and once partial discharge occurs in the medium, the insulation medium around the partial discharge is continuously eroded, so that the failure of the whole insulation system is finally caused. When the partial discharge phenomenon occurs inside the GIS equipment, the ultrahigh frequency signal with the frequency range of more than 300MHz can be released. The metal coaxial structure of the GIS can be regarded as a good electromagnetic waveguide body, high-order electromagnetic waves formed by partial discharge can be propagated along the waveguide direction for a long distance, and the high-order electromagnetic waves are diffused to the outside through the non-ferromagnetic material position on the GIS device. And receiving an ultrahigh frequency signal generated by the GIS internal partial discharge by using an external ultrahigh frequency sensor or directly collecting a signal by using the GIS internal sensor to identify the partial discharge type, judge the discharge degree and position.
At present, a GIS basin-type insulator of 220kV or more is widely installed with an on-line partial discharge monitoring device, and the defect degree of partial discharge in equipment can be monitored in real time. However, the 110kV GIS equipment still needs to be subjected to partial discharge live test, even if the GIS basin-type insulator is already provided with the partial discharge online monitoring sensor, according to the installation specification, the coverage area of the insulator is not all insulation discs, and the partial discharge signal still needs to be supplemented and the online monitoring device needs to be checked through the live test of the insulation discs which are not installed in daily life. Meanwhile, if the partial discharge online monitoring device detects internal partial discharge, further manual troubleshooting also needs to use a live test method.
At present, an external ultrahigh frequency sensor is commonly used in a partial discharge live test due to high sensitivity and good anti-interference performance. The GIS basin-type insulator of 110kV and above is designed with three types of common shielding type, non-shielding type and pouring hole type, and the external ultrahigh frequency sensor is difficult to detect the internal partial discharge signal because the outer surface of the common shielding basin-type insulator is wrapped by a metal flange; the unshielded basin-type insulator has strong detection signals, but has the defects of large outward electromagnetic radiation of the GIS, easy external interference on the detection signals and the like.
In order to solve the problems, more and more GIS manufacturers adopt basin-type insulators with pouring holes reserved during manufacturing, namely, most of the outer surfaces of the basin-type insulators are wrapped by metal flanges, and only the pouring holes are reserved and are non-shielding detection points. When GIS partial discharge testing is carried out, the metal sheet outside the closed pouring hole is removed, then the external ultrahigh frequency sensor is placed on the pouring hole of the basin-type insulator, and GIS equipment partial discharge signals are tested by detecting electromagnetic wave signals radiated to the position of the pouring hole.
The partial discharge testing device in the transformer substation is mainly installed on the GIS equipment with the voltage class of 220kV and above, but the live test work is still required to be carried out on the GIS equipment with the voltage class of 110 kV. According to the maintenance test regulations, periodic GIS partial discharge test work needs to be carried out on GIS equipment regularly, meanwhile, live test work needs to be carried out on the GIS equipment under the conditions of defect processing, fault troubleshooting and the like, a large amount of partial discharge live test work exists, but the test efficiency of the existing partial discharge test device is low, and therefore the partial discharge fault in the transformer substation is difficult to process in time.
Disclosure of Invention
The invention provides a GIS partial discharge live test device, which is used for solving the technical problem of low test efficiency of the partial discharge test device.
In view of the above, a first aspect of the present invention provides a GIS partial discharge live test apparatus, including: the device comprises a sensor, a test box body and a fixing component;
the fixing component is detachably mounted on the test box body and is used for detachably fixing the test box body on a GIS insulator to be tested;
the upper portion of test box body is equipped with the upper cover, and its lateral wall is equipped with the epoxy board, the sensor interface has been seted up to the epoxy board, the epoxy board with the sprue gate of the GIS insulator that awaits measuring corresponds the laminating setting, the sensor interface with the position of sprue gate corresponds the setting, the inside of test box body is equipped with sensor embedding portion, sensor embedding portion is used for dismantling the embedding the sensor, the input port of sensor with the structure of sensor interface is identical.
Preferably, the fixing assembly comprises two fixing plates, mounting holes are formed in the two fixing plates, the positions of the two fixing plates are correspondingly arranged, the two fixing plates are detachably mounted on two side walls of the test box body respectively, and the relative distance between the two fixing plates is adjustable.
Preferably, the device further comprises an adjusting bolt and an adjusting nut, wherein the two fixing plates are provided with a stroke hole, a bolt hole is formed in the joint between the test box body and the fixing plates, the adjusting bolt penetrates through the stroke hole and the bolt hole and is in threaded connection with the adjusting nut, so that the fixing plates can be detachably mounted on the side walls of the test box body, and the relative positions of the stroke hole and the bolt hole can be adjusted.
Preferably, the side wall of the test box body is provided with a cable outlet hole for the test cable of the sensor to pass through.
Preferably, the upper side edge of the test box body is hinged with the upper cover through a hinge.
Preferably, one end of the upper cover, which is far away from the hinge, is provided with a clamping seat, and the side wall of the test box body is provided with a lock catch which is matched with the clamping seat and is in buckled connection.
Preferably, the upper cover is relative the bottom surface of test box body's inner chamber is equipped with two pressure spring, works as the upper cover with when test box body is the closed condition, two pressure spring's free end is contradicted sensor and elasticity are the compression state.
Preferably, the system further comprises a server, an identification code is arranged on the outer wall of the test box body, the identification code has a unique ID, and position information, equipment IP addresses and historical test data corresponding to the identification code are stored in the server.
Preferably, the upper cover is made of stainless steel material.
According to the technical scheme, the invention has the following advantages:
the invention provides a GIS partial discharge live testing device, which can fix a testing box body on a GIS insulator to be tested through a fixing component, thereby avoiding manual operation of holding a sensor for testing, meanwhile, an epoxy resin plate is correspondingly attached to a pouring hole of the GIS insulator to be tested, a sensor interface is correspondingly arranged with the position of the pouring hole, an input port of the sensor is matched with the structure of the sensor interface, so that an ultrahigh frequency sensor can be ensured to be tightly attached to the pouring hole, the dissipation of electromagnetic waves in the GIS when the electromagnetic waves are radiated outwards is reduced, the ultrahigh frequency sensor can conveniently receive all signals, the testing accuracy is improved, and the testing efficiency is also improved; and an epoxy resin plate is adopted, so that the risk of reduction of the insulation strength of the basin-type insulator is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a GIS partial discharge live test apparatus according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a GIS partial discharge live test apparatus according to an embodiment of the present invention.
Detailed Description
At present, when a GIS partial discharge live testing device is used for testing, a metal sheet installed outside a sealed pouring hole of a GIS basin-type insulator is removed, a tester holds a sensor by hand and places the sensor on the pouring hole of the basin-type insulator, and a GIS equipment partial discharge signal is tested by detecting an electromagnetic wave signal radiated to the position of the pouring hole, but not a proprietary sensor fixing interface. And after the test is finished, taking out the handheld sensor, and repeatedly using the screws to fasten and install the metal sheet to seal the pouring gate. The prior art has the following defects:
1) during testing, the handheld sensor is arranged at the pouring gate, and a special sensor interface is lacked. The pouring hole in the manufacturing process of the basin-type insulator is approximately in a round corner rectangle shape, the length of the pouring hole is 45-55mm, and the width of the pouring hole is 15-25 mm.
2) The metal sheet usually adopts fastening bolt mode to seal the pouring hole, and many times of dismouting is easy to destroy pouring hole seal structure in the partial discharge test, especially outdoor GIS equipment, if the pouring hole is sealed badly, aqueous vapor, moisture in the air will get into in the pouring hole, lead to basin formula insulator dielectric strength to descend.
3) Due to the fact that 220kV and 500kV GIS equipment are large in interval quantity, metal sheet fastening bolts on a detachable sealing pouring hole are large in quantity during partial discharge testing, and an operator needs to hold the ultrahigh frequency sensor by hand, working intensity is high, working time is long, and working efficiency is low.
4) The external ultrahigh frequency sensor is placed on a nonstandard pouring hole for detection, and due to the fact that the external ultrahigh frequency sensor and the nonstandard pouring hole are different in size, the sensor cannot be tightly attached to the pouring hole, filling and sealing of insulating substances are lacked, and a part of electromagnetic wave signals are radiated out of the pouring hole and are not detected. Meanwhile, the ultrahigh frequency sensor is exposed in the air, an external electromagnetic shielding measure is lacked, when a pouring hole of the GIS insulator cannot be tightly attached to the sensor, a part of electromagnetic wave signals inside the GIS are transmitted out through the air, and signal attenuation to a certain degree exists, so that the test data are inaccurate due to the fact that the GIS insulator is easily interfered by external signals in the test process.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For easy understanding, referring to fig. 1 to 2, the present invention provides a GIS partial discharge live test apparatus, including: a sensor 10, a test cartridge 20 and a fixing assembly 30;
the fixing component 30 is detachably mounted on the test box body 20 and is used for detachably fixing the test box body 20 on a GIS insulator to be tested;
the upper cover 201 is arranged on the upper portion of the testing box body 20, the epoxy resin plate 202 is arranged on the side wall of the testing box body, the sensor interface 210 is formed in the epoxy resin plate 202, the epoxy resin plate 202 corresponds to and is attached to a pouring hole of a GIS insulator to be tested, the sensor interface 210 corresponds to and is arranged at the position of the pouring hole, the sensor embedding portion 203 is arranged inside the testing box body 20, the sensor embedding portion 203 is used for being detachably embedded into the sensor 10, and the input port of the sensor 10 is matched with the structure of the sensor interface 210.
It should be noted that the sensor 10 may be an ultrahigh frequency sensor, the sensor 10 is installed in the sensor embedding portion 203 in an inserting manner, and the sensor 10 may also be directly pulled out to complete the test after the test is completed, so as to avoid the cumbersome disassembly of the conventional fixing nut structure.
Meanwhile, the input port of the sensor 10 is matched with the structure of the sensor interface 210, the epoxy resin plate 202 is correspondingly attached to the pouring hole of the GIS insulator to be tested, and the sensor interface 210 is correspondingly arranged at the position of the pouring hole, so that the ultrahigh frequency sensor 10 can be ensured to be tightly attached to the pouring hole, the dissipation of electromagnetic waves in the GIS when the electromagnetic waves radiate outwards is reduced, and the ultrahigh frequency sensor can conveniently receive all signals.
Wherein, epoxy board 202 adopts the epoxy material, corresponds the laminating setting through epoxy board 202 and the pouring hole of the GIS insulator that awaits measuring for epoxy board 202 can seal the laminating department between sensor interface 210 and the pouring hole, and because the epoxy material possesses anti high temperature, be difficult for polluting, has good resistance humid air ability, simultaneously, still has good penetrability, and the electromagnetic wave is caught by the superfrequency sensor when being convenient for the partial discharge takes place. Simultaneously, use the epoxy resin closing plate can seal for a long time, need not the dismouting, can effectively solve the not tight, the invasion of moisture and the complicated problem consuming time of dismouting that traditional pouring aperture cover dismouting caused.
In an embodiment, the fixing assembly 30 includes two fixing plates 301, 302, the two fixing plates 301, 302 are both provided with mounting holes, the two fixing plates 301, 302 are correspondingly disposed, the two fixing plates 301, 302 are respectively detachably mounted on two sidewalls of the test cartridge 20, and a relative distance between the two fixing plates 301, 302 is adjustable.
It should be noted that the relative distance between the two fixing plates 301 and 302 is adjustable, so that the two fixing plates 301 and 302 can adapt to different types of GIS basin-type insulators, and the test box 20 can be reliably installed on the GIS basin-type insulators without manually holding the test box 20 for testing.
In the concrete implementation, two fixing plates 301 and 302 are used for fixing the test box body 20 on the surface of the basin-type insulator, and the test box body 20 is tightly attached to the basin-type insulator through being fastened with a flange bolt on the basin-type insulator and is firmly installed on the GIS basin-type insulator, so that the test box body is not loosened and falls off under the influence of external force.
In one embodiment, the testing device further comprises an adjusting bolt 304 and an adjusting nut 305, the two fixing plates 301 and 302 are both provided with a stroke hole 303, a bolt hole is formed at a joint between the testing box body 20 and the fixing plates, the adjusting bolt 304 penetrates through the stroke hole 303 and the bolt hole to be in threaded connection with the adjusting nut 305, so that the fixing plates can be detachably mounted on the side walls of the testing box body 20, and the relative positions between the stroke hole 303 and the bolt hole can be adjusted.
It should be noted that the stroke hole 303 may be a long hole having an adjustable relative position with the bolt hole, so that the relative position between the fixing plate and the test cassette 20 can be adjusted, and in the general example, a spring is provided between the adjusting bolt 304 and the test cassette 20, so that the distance between the fixing plate and the test cassette 20 can be adjusted by turning the adjusting nut 305, thereby adjusting the relative distance between the two fixing plates 301 and 302.
In one embodiment, the side wall of the testing cassette body 20 is formed with a cable exit hole 204 for allowing a testing cable of the sensor 10 to exit.
It is understood that the cable exit hole 204 can facilitate the exit of test cables, and is adapted to different models of test cables.
In one embodiment, the upper side edge of the test cassette 20 is hinged to the upper lid 201 by a hinge.
It should be noted that the test box 20 and the upper cover 201 are designed to be hinged to each other, and the test box 20 and the upper cover 201 can be opened and closed by rotating the test box 20 and the upper cover 201 with the two hinges 205 and 206 as axes, so that a tester can test the test box conveniently.
In one embodiment, a clamping seat 211 is provided at an end of the upper cover 201 away from the hinge, and a latch 209 for engaging and snapping the clamping seat 211 is provided at a sidewall of the testing cassette 20.
It should be noted that the latch 209 and the card seat 211 are matched to lock or unlock, so that the test box 20 and the upper cover 201 can be switched between the open state and the closed state, and the sensor 10 can be sealed in the test box 20, thereby preventing external interference and facilitating the mounting and fixing of the package of the test box 20 and the sensor 10 therein.
In one embodiment, the top cover 201 is provided with two compression springs 207, 208 at the bottom surface of the inner cavity of the test cassette 20, and when the top cover 201 and the test cassette 20 are in the closed state, the free ends of the two compression springs 207, 208 abut against the sensor 10 and are elastically compressed.
It should be noted that when the test cartridge 20 is closed, the two compression springs 207 and 208 will give downward pressure to the sensor 10, so as to fix the sensor 10 by the pressure, thereby ensuring that the sensor 10 is prevented from slipping off during the test and ensuring that the sensor 10 is tightly attached to the pouring hole.
Specifically, when a tester performs a GIS partial discharge test, after the tester inserts the sensor 10 to perform the test, the two compression springs 207 and 208 provide a pressure greater than or equal to 50N to press down the sensor 10 by closing the upper cover 201 and closing the latch 209, so that the sensor 10 is tightly attached to the inner bottom of the test box body 20, the sensor 10 is prevented from loosening and falling off, and therefore the GIS partial discharge live test can be performed without the tester holding the sensor 10 by hands.
In one embodiment, the testing device further comprises a server, the outer wall of the testing box body 20 is provided with an identification code, the identification code has a unique ID, and the server stores position information, a device IP address and historical testing data corresponding to the identification code.
Specifically, the identification code can be set in a two-dimensional code identification mode, a position label mode or a nameplate mode and the like, standard management of test data can be achieved by matching the identification code with a server, the identification code is scanned through a mobile terminal (such as a mobile phone), position information, equipment IP addresses and historical test data of the test device can be rapidly identified, and analysis efficiency of the test data is improved.
In one embodiment, the upper cover 201 is made of stainless steel.
It can be understood that the upper cover 201 is made of stainless steel material, which can effectively protect the testing device from being damaged by external force, and prevent the problems of internal moisture and water inflow of the basin-type insulator caused by the sealing failure of the epoxy resin plate 202 therein.
The fixing plates 1 and 3 are used for fixing the test interface box bottom box 8 on the surface of the basin-type insulator, and the test interface box is tightly attached to the basin-type insulator through fastening with a flange bolt on the basin-type insulator and is firmly installed on the GIS without being loosened and falling off under the influence of external force. Fixed plate 1 and 3 are through installing test interface box 8 in basin formula insulator fixed position, realize the standardization and the standardization management of GIS partial discharge detection position, improve GIS partial discharge detection sensitivity and the dependability of data.
The embodiment provides a GIS partial discharge live testing device, a testing box body 20 can be fixed on a GIS insulator to be tested through a fixing component 30, so that manual operation of holding a sensor 10 for testing is omitted, meanwhile, an epoxy resin plate 202 is correspondingly attached to a pouring hole of the GIS insulator to be tested, a sensor interface 210 is correspondingly arranged with the position of the pouring hole, an input port of the sensor 10 is matched with the structure of the sensor interface 210, the ultrahigh frequency sensor 10 can be ensured to be tightly attached to the pouring hole, the escape of electromagnetic waves in the GIS when the electromagnetic waves are radiated outwards is reduced, the ultrahigh frequency sensor 10 can receive all signals conveniently, the testing accuracy is improved, and the testing efficiency is also improved; and the epoxy resin plate 202 is adopted, so that the risk of reduction of the insulation strength of the basin-type insulator is reduced.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A GIS partial discharge live test device is characterized by comprising: the device comprises a sensor, a test box body and a fixing component;
the fixing component is detachably mounted on the test box body and is used for detachably fixing the test box body on a GIS insulator to be tested;
the upper portion of test box body is equipped with the upper cover, and its lateral wall is equipped with the epoxy board, the sensor interface has been seted up to the epoxy board, the epoxy board with the sprue gate of the GIS insulator that awaits measuring corresponds the laminating setting, the sensor interface with the position of sprue gate corresponds the setting, the inside of test box body is equipped with sensor embedding portion, sensor embedding portion is used for dismantling the embedding the sensor, the input port of sensor with the structure of sensor interface is identical.
2. The GIS partial discharge live test device according to claim 1, wherein the fixing component comprises two fixing plates, the two fixing plates are respectively provided with a mounting hole, the two fixing plates are correspondingly arranged, the two fixing plates are respectively detachably mounted on two side walls of the test box body, and the relative distance between the two fixing plates is adjustable.
3. The GIS partial discharge live test device according to claim 2, further comprising an adjusting bolt and an adjusting nut, wherein both of the fixing plates are provided with a stroke hole, a bolt hole is formed at a joint between the test box body and the fixing plate, and the adjusting bolt penetrates through the stroke hole and the bolt hole to be in threaded connection with the adjusting nut, so that the fixing plate is detachably mounted on the side wall of the test box body, and the relative position between the stroke hole and the bolt hole is adjustable.
4. The GIS partial discharge live test device according to claim 1, wherein a cable exit hole is formed in a side wall of the test box body for a test cable of the sensor to pass through.
5. The GIS partial discharge live test device of claim 1, wherein the upper side edge of the test box body is hinged with the upper cover through a hinge.
6. The GIS partial discharge live test device according to claim 5, wherein a clamping seat is arranged at one end of the upper cover away from the hinge, and a lock catch which is matched and buckled with the clamping seat is arranged on the side wall of the test box body.
7. The GIS partial discharge live test device according to claim 1, wherein the upper cover is provided with two compression springs opposite to the bottom surface of the inner cavity of the test box body, and when the upper cover and the test box body are in a closed state, free ends of the two compression springs abut against the sensor and are elastically compressed.
8. The GIS partial discharge live test device according to claim 1, further comprising a server, wherein an identification code is arranged on an outer wall of the test box body, the identification code has a unique ID, and position information, an equipment IP address and historical test data corresponding to the identification code are stored in the server.
9. The GIS partial discharge live test device of claim 1, wherein the upper cover is made of stainless steel.
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| CN202111137009.3A CN113866624A (en) | 2021-09-27 | 2021-09-27 | GIS partial discharge live-line testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117007924A (en) * | 2023-08-07 | 2023-11-07 | 武汉朗德电气有限公司 | Interface device of GIS partial discharge test sensor |
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| CN212646745U (en) * | 2020-05-22 | 2021-03-02 | 上海华乘智能设备有限公司 | On-spot installation fixing device of sensor is put in superfrequency office |
| CN214011300U (en) * | 2020-10-29 | 2021-08-20 | 济南润泽伟业经贸有限公司 | External sensor installation device |
| CN113030525A (en) * | 2021-03-15 | 2021-06-25 | 国网天津市电力公司电力科学研究院 | Fixing and shielding device of GIS basin-type insulator ultrahigh frequency sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117007924A (en) * | 2023-08-07 | 2023-11-07 | 武汉朗德电气有限公司 | Interface device of GIS partial discharge test sensor |
| CN117007924B (en) * | 2023-08-07 | 2024-04-09 | 武汉朗德电气有限公司 | Interface device of GIS partial discharge test sensor |
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