CN217521298U - Partial discharge measuring equipment and device of GIS insulating pull rod - Google Patents
Partial discharge measuring equipment and device of GIS insulating pull rod Download PDFInfo
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- CN217521298U CN217521298U CN202220735531.5U CN202220735531U CN217521298U CN 217521298 U CN217521298 U CN 217521298U CN 202220735531 U CN202220735531 U CN 202220735531U CN 217521298 U CN217521298 U CN 217521298U
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Abstract
The utility model discloses a GIS insulation pull rod's partial discharge measuring equipment, including high pressure side electrode subassembly and low pressure side electrode subassembly, low pressure electrode subassembly contains actuating mechanism, can change the distance between the high pressure electrode subassembly and the low pressure electrode subassembly. The utility model also discloses a partial discharge measuring device of GIS insulation pull rod, include: the device comprises a voltage source, a high-voltage conductor, at least one signal acquisition terminal, at least one partial discharge detection impedance and at least one measuring device, wherein the measuring device, the signal acquisition terminal and the partial discharge detection impedance are in one-to-one correspondence; the voltage source is used for applying test voltage to the GIS insulating pull rod in each measuring device; the partial discharge detection impedance is respectively connected with a GIS insulating pull rod and a ground end in the corresponding measuring equipment; and the signal acquisition terminal is used for measuring the partial discharge signal on the corresponding partial discharge detection impedance.
Description
Technical Field
The utility model relates to a power transmission and transformation equipment test technical field to more specifically, relate to a partial discharge measuring equipment and device of GIS insulating pull rod.
Background
The insulating pull rod is an important part in gas insulated metal-enclosed switchgear (GIS), is widely applied to circuit breakers, isolating switches and resistance switches, transmits power and energy to a motion mechanism, and plays a role in electrical insulation. Before the insulating pull rod is assembled inside equipment, insulation voltage resistance and partial discharge tests must be carried out, and the partial discharge tests require that the partial discharge capacity of a single insulating part is not more than 3 pC.
At present, when the insulation, voltage resistance and partial discharge tests of insulation pull rods are carried out, in order to improve the test efficiency, a plurality of insulation pull rods are arranged in a test tool in parallel, two ends of each insulation pull rod are respectively installed on a high-voltage shielding cover and a low-voltage shielding cover of the tool, test voltage is applied between the high-voltage shielding cover and the low-voltage shielding cover during the test, and the partial discharge is measured. A plurality of insulating pull rods are connected in parallel and share a grounding point, and when the partial discharge is tested, the coupling capacitance between the pull rods is very large, so that the sensitivity of the partial discharge detection is influenced, and the insulating property of the insulating pull rods cannot be effectively checked; the tool is uniformly provided with a partial discharge instrument, and the defective pull rod and the defective position are difficult to judge.
Disclosure of Invention
The utility model provides a GIS insulation pull rod's partial discharge measuring equipment and device to solve the problem of how to measure GIS insulation pull rod's partial discharge volume high-efficiently, and improved sensitivity to software testing.
In order to solve the problem, according to the utility model discloses an aspect, the utility model provides a partial discharge measuring equipment of GIS insulating pull rod, equipment, include: a high side electrode assembly and a low side electrode assembly; wherein the content of the first and second substances,
the high pressure side electrode assembly includes: a high-voltage side shielding structure and a high-voltage side connecting wire; one end of the GIS insulating pull rod is mounted on the high-voltage side shielding structure, and one end of the GIS insulating pull rod is electrically connected with external equipment through the high-voltage side connecting wire;
the low-side electrode assembly includes: the device comprises a connecting electrode, a low-voltage side shielding structure, a low-voltage side connecting wire, a chassis, a driving mechanism, a base and a supporting structure; the low-voltage side shielding structure is connected with the low-voltage side connecting wire, the low-voltage side shielding structure is installed on the chassis, the chassis is installed on the driving mechanism, the driving mechanism is installed on the base, and the supporting structure is used for supporting the base; the other end of the GIS insulating pull rod is mounted on the low-voltage side shielding structure, can penetrate through the low-voltage side shielding structure and the chassis through a hole in the low-voltage side shielding structure and a hole in the chassis, and can change the distance between the low-voltage side shielding structure and the high-voltage side shielding structure by adjusting the driving mechanism, so that the length of the GIS insulating pull rod between the low-voltage side shielding structure and the high-voltage side shielding structure can be adjusted; the connecting electrode is in a circular ring shape, and the connecting electrode sleeve is arranged on the GIS insulation pull rod, can slide freely in the axial direction of the GIS insulation pull rod and does not rub the outer surface of the GIS insulation pull rod.
Preferably, wherein the apparatus further comprises:
and the control module is connected with the driving mechanism and used for controlling the driving mechanism to stretch along the height direction of the supporting structure.
According to the utility model discloses a further aspect provides a partial discharge measurement device of GIS insulating pull rod, the device includes:
the device comprises a voltage source, a high-voltage conductor, at least one signal acquisition terminal, at least one partial discharge detection impedance and at least one measuring device, wherein the measuring device, the signal acquisition terminal and the partial discharge detection impedance are in one-to-one correspondence; wherein the content of the first and second substances,
the voltage source is connected with a high-voltage side connecting wire in each measuring device arranged in the air chamber through the high-voltage conductor and is used for applying test voltage to a GIS (gas insulated switchgear) insulating pull rod in each measuring device;
one end of the partial discharge detection impedance is connected with a low-voltage side connecting line in the measuring equipment, and the other end of the partial discharge detection impedance is connected with the ground end;
and the signal acquisition terminal is connected with the corresponding partial discharge detection impedance and is used for measuring the partial discharge signal on the corresponding partial discharge detection impedance.
Preferably, the low-pressure side connecting line in the measuring equipment is led out through a small outlet sleeve arranged on the air chamber shell; the low-voltage side electrode assembly is insulated from the plenum housing.
Preferably, wherein the gas chamber is filled with SF 6 A gas.
The utility model provides a GIS insulation pull rod's partial discharge measuring equipment and device, the device includes: the device comprises a voltage source, a high-voltage conductor, at least one signal acquisition terminal, at least one partial discharge detection impedance and at least one measuring device, wherein the measuring device, the signal acquisition terminal and the partial discharge detection impedance are in one-to-one correspondence; the device of the utility model can simultaneously test the partial discharge performance of a plurality of GIS insulating pull rods, thereby improving the detection speed, and improving the partial discharge detection sensitivity of the insulating pull rods to 1pC which is higher than the relevant test standard; the testing device can meet the requirement of carrying out tests on a plurality of insulating pull rods simultaneously, ensures the testing efficiency, can change the distance between high and low voltage electrodes, reduces the coupling capacitance between the insulating pull rods, further improves the testing precision, and accurately positions the defect parts of the insulating pull rods, thereby effectively checking the insulating property of the insulating pull rods and being beneficial to improving the product quality level.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings:
fig. 1 is a schematic structural diagram of a partial discharge measurement device 100 of a GIS insulation pull rod according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a partial discharge measurement device 200 of a GIS insulation pull rod according to an embodiment of the present invention;
fig. 3 is a schematic view of a partial discharge measurement apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of partial discharge measurement cross-reference detection according to an embodiment of the present invention;
fig. 5 is an exemplary diagram of a partial discharge measurement method of a GIS insulation pull rod according to an embodiment of the present invention;
in fig. 1, 1-high voltage side connection line, 2-high voltage side shielding structure, 3-insulating pull rod, 4-low voltage side shielding structure, 5-chassis, 6-driving mechanism, 7-base, 8-supporting structure, 9-low voltage side connection line, and 10-connection electrode.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of fully and completely disclosing the present invention and fully communicating the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their context in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a schematic structural diagram of a partial discharge measurement apparatus 100 of a GIS insulation pull rod according to an embodiment of the present invention. As shown in fig. 1, the embodiment of the present invention provides a partial discharge measurement device 100 for a GIS insulation pull rod, including: a high side electrode assembly and a low side electrode assembly.
In an embodiment of the present invention, the high pressure side electrode assembly includes: a high-voltage side connecting wire 1 and a high-voltage side shielding structure 2; one end of the GIS insulating pull rod 3 is installed on the high-voltage side shielding structure 2, and one end of the GIS insulating pull rod 3 is electrically connected with external equipment through the high-voltage side connecting wire 1.
In an embodiment of the present invention, the low voltage side electrode assembly includes: the device comprises a connecting electrode 10, a low-voltage side shielding structure 4, a low-voltage side connecting wire 9, a chassis 5, a driving mechanism 6, a base 7 and a supporting structure 8; the low-voltage side shielding structure 4 is connected with the low-voltage side connecting wire 9, the low-voltage side shielding structure 4 is mounted on the chassis 5, the chassis 5 is mounted on the driving mechanism 6, the driving mechanism 6 is mounted on the base 7, and the supporting structure 8 is used for supporting the base 7; the other end of the GIS insulating pull rod is installed on the low-voltage side shielding structure 4, can penetrate through the low-voltage side shielding structure 4 and the chassis 5 through a hole in the low-voltage side shielding structure 4 and a hole in the chassis, changes the distance between the low-voltage side shielding structure 4 and the high-voltage side shielding structure 2 by adjusting the driving mechanism, and further adjusts the length of the GIS insulating pull rod between the low-voltage side shielding structure 4 and the high-voltage side shielding structure 2; the connecting electrode 10 is in a ring shape, and the connecting electrode 10 is sleeved on the GIS insulating pull rod, can slide freely in the axial direction of the GIS insulating pull rod, and does not rub against the outer surface of the GIS insulating pull rod.
Preferably, wherein the apparatus further comprises:
and the control module is connected with the driving mechanism and used for controlling the driving mechanism to stretch along the height direction of the supporting structure.
The utility model discloses an among the embodiment, actuating mechanism installs between chassis and base, and actuating mechanism is one-dimensional motion, can adjust the axial distance between chassis and the base according to control module's instruction. The low-voltage side shielding structure is arranged on the chassis and used for shielding the low-voltage end of the insulating pull rod, and the low-voltage side connecting wire is used for electrically connecting the insulating pull rod with external equipment.
Fig. 2 is a schematic structural diagram of a partial discharge measurement device 200 of a GIS insulation pull rod according to an embodiment of the present invention. As shown in fig. 2, the embodiment of the present invention provides a partial discharge measurement apparatus 200 for a GIS insulation pull rod, including: a voltage source 201, a high voltage conductor 202, at least one signal acquisition terminal 203, at least one partial discharge detection impedance 204 and at least one measurement device 205 as described above, the measurement device, signal acquisition terminal and partial discharge detection impedance being in one-to-one correspondence.
Preferably, the voltage source 201 is connected to each measuring device 205 arranged in the gas chamber via the high voltage conductor 202, and is used for applying a test voltage to a GIS insulated pull rod in each measuring device.
Preferably, the partial discharge detection impedance 204 is respectively connected with a GIS insulation pull rod and a ground terminal in the corresponding measuring equipment;
preferably, the signal collecting terminal 203 is connected to the corresponding partial discharge detection impedance, and is configured to measure a partial discharge signal on the corresponding partial discharge detection impedance.
Preferably, the low-pressure side connecting line in the measuring equipment is led out through a small outlet sleeve arranged on the air chamber shell; the low-voltage side electrode assembly is insulated from the plenum housing.
Preferably, wherein the gas chamber is filled with SF 6 A gas.
In an embodiment of the present invention, a partial discharge measurement apparatus includes: voltage source U, high voltage conductor, plurality of measuring devices, plurality of partial discharge detection impedances Z X1 ,Z X2 ,…,Z XN And a plurality of signal acquisition terminals CH1, CH2, …, CH N . Wherein, N identical measuring devices provided with GIS insulating pull rods to be measured are arranged at SF 6 In the air chamber, N is more than or equal to 2, a high-voltage side electrode assembly of the measuring device is connected with a high-voltage conductor through a connecting wire, a low-voltage side electrode assembly is insulated with a shell of the air chamber, is led out of the air chamber through a small outgoing wire sleeve through the connecting wire and detects impedance Z through partial discharge with the same impedance value X1 、 Z X2 ……Z XN And is grounded. The N measuring devices form identical parallel branches. And a partial discharge signal led out of the partial discharge detection impedance is connected into a signal acquisition terminal. The signal acquisition terminal is used for measuring the partial discharge signal on the corresponding partial discharge detection impedance. As shown in fig. 3, which is a schematic diagram of a testing apparatus including 4 measuring devices, the signal acquisition terminal may be an oscilloscope.
The utility model discloses an among the embodiment, carry out the test of partial discharge performance based on the partial discharge signal through testing arrangement.
Fig. 4 is a schematic diagram of partial discharge cross-reference detection according to an embodiment of the present invention. For example, if the insulating pull rod in the measuring device 4 generates partial discharge, the partial discharge pulse current thereof takes other detection branches as a loop, and the partial discharge signal in the signal acquisition terminal CH4 and the signal in other signal acquisition terminals have opposite polarities; when the power supply has noise interference, noise interference current is shunted on all branches, and the signal polarities of all the signal acquisition terminals are consistent.
Specifically, the process of testing by the device comprises the following steps:
(1) cleaning the surface of the insulating pull rod to be tested to remove static electricity and attached foreign matters on the surface of the insulator;
(2) the insulated pull rod is mounted on a test fixture,feeding SF 6 The (sulfur hexafluoride) air chamber is connected with the partial discharge testing device, is filled with SF6 gas to a set pressure value and is connected with a voltage source;
(3) loading a withstand voltage test voltage, and carrying out a withstand voltage test;
(4) and loading partial discharge measurement test voltage and measuring partial discharge.
In the step (2), the position of the chassis needs to be adjusted, so that one end of the insulating pull rod is installed in the high-voltage side shielding structure, and the other end of the insulating pull rod is located in the low-voltage side shielding structure.
In the step (4), the partial discharge of the insulating pull rod is measured by adopting a partial discharge signal cross reference detection mode. When there is partial discharge in the insulating rod in a tested unit, the impedance Z is detected X Will be significantly larger than the signal amplitude of the remaining detection impedances and of opposite polarity; when the power supply has interference, because the equivalent capacitance of each tested unit is equal, the signal amplitude of each detection impedance is the same, and the polarity is the same. Based on the relation between the signal amplitude and the polarity, the interference can be effectively identified, and the partial discharge of a certain insulating pull rod can be distinguished.
In the step (4), if the partial discharge is lower than the standard required value, the partial discharge test is passed. And if the partial discharge is still higher than the standard required value after the interference is eliminated, judging the insulating pull rod with the partial discharge.
In the step (4), if partial discharge occurs in a certain insulating pull rod, the partial discharge occurrence position needs to be further judged. The control driving mechanism drives the chassis to move to the high-voltage side along the axial direction of the insulating pull rod. As the distance between the chassis and the upper cover is reduced, the loaded partial discharge measurement test voltage should be scaled down. When the chassis is pushed to a certain position, the partial discharge signal disappears, and the defect of generating partial discharge is positioned at the position.
Specifically, as shown in fig. 5, during the test, if the partial discharge amounts measured by the signal acquisition terminal are all less than or equal to 1pC, the test is passed; if the partial discharge amount measured by the signal acquisition terminal is greater than 1pC, observing the partial discharge signal of each detection impedance; wherein the content of the first and second substances,
if the signals are determined to simultaneously meet the conditions that the amplitudes are consistent and the polarities are the same according to the partial discharge signals acquired by the signal acquisition terminals, determining that power supply interference exists, eliminating the power supply interference, and reloading partial discharge test voltage;
and if the signals are determined to be consistent in amplitude and same in polarity at different times according to the partial discharge signals acquired by the signal acquisition terminals, and the partial discharge signals with the maximum amplitude and opposite in polarity are determined to exist according to the partial discharge signals acquired by the signal acquisition terminals, determining the target GIS insulating pull rod in which partial discharge occurs according to the partial discharge signals with the maximum amplitude and opposite in polarity.
If the signals are determined to be consistent in amplitude and same in polarity when different signals are determined according to the partial discharge signals acquired by the signal acquisition terminals, and the partial discharge signals with the maximum amplitude and opposite in polarity are determined to be absent according to the partial discharge signals acquired by the signal acquisition terminals, other interferences are determined to be present, other interferences are eliminated, partial discharge test voltage is reloaded, and partial discharge is measured again.
As shown in fig. 5, after determining that there is a target GIS insulated link where the partial discharge occurs, it is necessary to further determine the partial discharge occurrence position. And controlling the driving mechanism to enable the chassis to move towards the high-voltage end along the axial direction of the insulating pull rod. As the distance between the chassis and the upper cover is reduced, the loaded partial discharge measurement test voltage should be scaled down. When the chassis is pushed to a certain position, the partial discharge signal disappears, and the defect of generating partial discharge is positioned at a section moved before.
The method of the utility model adopts the local discharge pulse current mutual reference detection, which can obviously improve the signal-to-noise ratio, the sensitivity, the pulse recognition capability and the accidental pulse capturing capability of the local discharge measurement, and improve the local discharge detection sensitivity of the insulating pull rod to 1 pC; the testing of a plurality of insulating pull rods can be simultaneously carried out, and the testing efficiency is ensured; by changing the distance between the high-voltage and low-voltage electrodes, the coupling capacitance between the insulating pull rods is further reduced, the partial discharge test precision of the insulating pull rods is improved, and the defect parts of the insulating pull rods are accurately positioned, so that the insulating property of the insulating pull rods is effectively checked, and the product quality level is favorably improved.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the above disclosed are equally possible within the scope of the invention, as would be apparent to a person skilled in the art, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.
Claims (5)
1. A partial discharge measurement device of a GIS insulation pull rod, characterized in that the device comprises: a high side electrode assembly and a low side electrode assembly; wherein the content of the first and second substances,
the high pressure side electrode assembly includes: a high-voltage side shielding structure and a high-voltage side connecting wire; one end of the GIS insulating pull rod is arranged on the high-voltage side shielding structure, and one end of the GIS insulating pull rod is electrically connected with external equipment through the high-voltage side connecting wire;
the low-side electrode assembly includes: the device comprises a connecting electrode, a low-voltage side shielding structure, a low-voltage side connecting wire, a chassis, a driving mechanism, a base and a supporting structure; the low-voltage side shielding structure is connected with the low-voltage side connecting wire, the low-voltage side shielding structure is installed on the chassis, the chassis is installed on the driving mechanism, the driving mechanism is installed on the base, and the supporting structure is used for supporting the base; the other end of the GIS insulating pull rod is mounted on the low-voltage side shielding structure, can penetrate through the low-voltage side shielding structure and the chassis through a hole in the low-voltage side shielding structure and a hole in the chassis, and can change the distance between the low-voltage side shielding structure and the high-voltage side shielding structure by adjusting the driving mechanism, so that the length of the GIS insulating pull rod between the low-voltage side shielding structure and the high-voltage side shielding structure can be adjusted; the connecting electrode is in a circular ring shape, and the connecting electrode sleeve is arranged on the GIS insulation pull rod and can freely slide along the axial direction of the GIS insulation pull rod without friction with the outer surface of the GIS insulation pull rod.
2. The apparatus of claim 1, further comprising:
and the control module is connected with the driving mechanism and used for controlling the driving mechanism to stretch along the height direction of the supporting structure.
3. A partial discharge measurement device of a GIS insulation pull rod is characterized by comprising: a voltage source, a high voltage conductor, at least one signal acquisition terminal, at least one partial discharge detection impedance, and at least one measurement device according to claim 1, the measurement device, signal acquisition terminal, and partial discharge detection impedance being in one-to-one correspondence; wherein the content of the first and second substances,
the voltage source is connected with a high-voltage side connecting wire in each measuring device arranged in the air chamber through the high-voltage conductor and is used for applying test voltage to a GIS insulating pull rod in each measuring device;
one end of the partial discharge detection impedance is connected with a low-voltage side connecting line in the measuring equipment, and the other end of the partial discharge detection impedance is connected with the ground end;
and the signal acquisition terminal is connected with the corresponding partial discharge detection impedance and is used for measuring a partial discharge signal on the corresponding partial discharge detection impedance.
4. The apparatus of claim 3, wherein the low-pressure side connection line in the measuring device is led out through a small outlet bushing provided on the housing of the gas chamber; the low-voltage side electrode assembly is insulated from the plenum housing.
5. The apparatus of claim 3, wherein the gas chamber is filled with SF 6 A gas.
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| CN202220735531.5U CN217521298U (en) | 2022-03-30 | 2022-03-30 | Partial discharge measuring equipment and device of GIS insulating pull rod |
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| CN202220735531.5U CN217521298U (en) | 2022-03-30 | 2022-03-30 | Partial discharge measuring equipment and device of GIS insulating pull rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116148606A (en) * | 2022-12-05 | 2023-05-23 | 山东泰开检测有限公司 | GIS capacitor partial discharge testing tool, testing device and testing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116148606A (en) * | 2022-12-05 | 2023-05-23 | 山东泰开检测有限公司 | GIS capacitor partial discharge testing tool, testing device and testing method |
| CN116148606B (en) * | 2022-12-05 | 2023-11-17 | 山东泰开检测有限公司 | GIS (gas insulated switchgear) capacitor partial discharge testing tool, partial discharge testing device and testing method |
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