Batch isolation switch transmission rod insulation test device and method

Abstract

The invention discloses a batch isolation switch transmission rod insulation test device and method, and belongs to the technical field of power system power transmission and distribution equipment tests, and the batch isolation switch transmission rod insulation test device comprises a test platform, isolation switch transmission rods, a test static terminal, a test moving terminal and a test connection bar. The test platform is divided into an upper part and a lower part, the lower half part of the test platform is a base platform, the upper half part of the test platform is an adjusting plate capable of rotatably adjusting the distance, the upper surface of the base platform is provided with a test static terminal, and the lower surface of the base platform is provided with an adjusting nut. Repeated labor is reduced, material waste is reduced, and batch tests are beneficial to ensuring that all isolation switch transmission rods are tested under the same condition, so that the consistency problem in the production process is easier to find, defects can be found in the early stage, the product reliability is improved, the statistical significance is higher, and accidental errors are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission and distribution equipment testing in an electric power system, and in particular relates to a device and method for testing the insulation of a transmission rod of a batch disconnector. Background Art

[0002] C-GIS equipment, namely box-type gas-insulated metal-enclosed switchgear, is a power distribution equipment developed at the end of the last century and specially used in medium voltage systems. Its outstanding safety and reliability have enabled it to develop rapidly at the beginning of this century and has developed rapidly in my country's current transmission and distribution network system.

[0003] At present, the 40.5kV inflatable cabinet three-position disconnector adopts direct-acting propulsion to perform the three-position disconnector grounding, opening, closing and other functions. The insulation performance of the disconnector transmission rod of the direct-acting disconnector is one of the key factors to ensure its safe and reliable operation.

[0004] As the key transmission component of direct-acting isolating switches, the insulation performance of the isolating switch transmission rod directly affects the electrical performance and operational safety of the switch. If the insulation performance of the lead screw is poor, it may cause electrical breakdown, arc discharge and other faults, and even cause fire or electric shock accidents.

[0005] In order to ensure the insulation performance of the isolating switch transmission rod, the newly purchased isolating switch transmission rod must be subjected to a partial discharge test. The partial discharge test is designed to detect whether there is a partial discharge phenomenon in the isolating switch transmission rod under a specific voltage, so as to evaluate the reliability and safety of its insulation system. Through the test, potential defects in the insulation system of the isolating switch transmission rod, such as bubbles, impurities, cracks, etc., can be found, so that timely measures can be taken to repair or replace them to avoid electrical breakdown and arc discharge.

[0006] In the prior art, the isolating switch transmission rod in the C-GIS equipment can only be subjected to insulation test after the equipment is installed. If there is an insulation problem with the isolating switch transmission rod, the isolating switch transmission rod needs to be replaced, which makes the installation of the isolating switch transmission rod more complicated.

[0007] Due to the lack of batch insulation test equipment and methods for isolating switch transmission rods, currently, the insulation test can only be carried out on a single isolating switch transmission rod. If a full inspection test is carried out on the isolating switch transmission rod, the workload will increase. If a random inspection test is carried out on the isolating switch transmission rod, some isolating switch transmission rods may have insulation risks. The efficiency of a single test is low, the cost is high, it is difficult to carry out quality control, and the reliability of the test data is low. Summary of the invention

[0008] In order to solve the deficiencies in the prior art, the present invention provides a batch insulation test device and method for isolating switch transmission rods to solve the problem that the isolating switch transmission rods in the prior art can only be subjected to insulation tests after the equipment is installed. If there is an insulation problem with the isolating switch transmission rod, the isolating switch transmission rod needs to be replaced, resulting in cumbersome installation of the isolating switch transmission rod, and the isolating switch transmission rod cannot be subjected to batch insulation tests. The efficiency of a single test is low, the cost is high, quality control is difficult, and the reliability of test data is low.

[0009] The present invention adopts the following technical solution.

[0010] The first aspect of the present invention discloses a batch isolation switch transmission rod insulation test device, comprising: a test platform, an isolation switch transmission rod, a test static terminal, a test dynamic terminal and a test connection bar;

[0011] The test platform is divided into two parts, the lower part of the test platform is the base platform, and the upper part of the test platform is an adjustment plate that can rotate to adjust the distance. The upper surface of the base platform is installed with a test static terminal, and the lower surface of the base platform is installed with an adjustment nut. A base is also installed on the lower surface of the base platform. A grounding nut is arranged on one side of the base, and the grounding nut is used for grounding the test platform. An adjustment nut is also installed on the upper surface of the adjustment plate, and a test moving terminal is installed on the lower surface of the adjustment plate. The base platform and the adjustment plate are connected through an isolating switch transmission rod. The test connection row is used to connect the input end of the test current and the adjustment plate, as well as to connect two adjacent adjustment plates. The number of the test static terminal, the test moving terminal, and the test connection row are all several.

[0012] As an improvement, the base platform is placed stationary on the ground, and the adjustment plate adjusts the distance between the test static terminal and the test moving terminal by rotating the adjustment nut. Threads are set on the adjustment nut and the isolating switch transmission rod, and the isolating switch transmission rod is used for test verification.

[0013] As an improvement, the surfaces of the adjusting nut and the isolating switch transmission rod are both provided with Tr22 trapezoidal threads.

[0014] As an improvement, the base platform is made of a stainless steel plate, a first circular hole is opened on the surface of the base platform, the first circular hole is used to pass the isolating switch transmission rod, and a square hole is opened on the surface of the base platform, the square hole is used to constrain the test static terminal.

[0015] As an improvement, the number of the first circular holes is 9 groups, and the specification thereof is Φ30.

[0016] As an improvement, the number of the square holes is 4 groups, the specification of which is 240×335, and the four corners of the square holes are rounded to R50.

[0017] As an improvement, a load is installed on the lower surface of the base platform so that the base is subjected to an upward push-up load, and a notch is opened on the base on the lower surface of the base platform.

[0018] As an improvement, a 55mm deep countersunk hole is opened on the upper surface of the test static terminal, and the countersunk hole is used to simulate the working condition of the isolating switch transmission rod. There is a copper terminal on the lower surface of the test moving terminal, and a second circular hole is opened on the surface of the copper terminal. The copper terminal is used to install and fix the test moving terminal, and the second circular hole is used to pass the isolating switch transmission rod.

[0019] As an improvement, the test static terminal and the test dynamic terminal are both made of Φ75 copper rods, the specifications of the copper terminal are 90×75×10, and the number of the second circular holes is 4, and their specifications are Φ10.

[0020] A second aspect of the present invention discloses a method for testing the insulation of a transmission rod of a batch disconnector, comprising the following steps:

[0021] Install the test static terminal at the first Φ30 round hole on the upper surface of the test platform, with the 55mm deep countersunk hole of the test static terminal facing upwards, install the isolating switch transmission rod, and then fasten the test moving terminal and the adjustment plate together, with the test moving terminal facing downwards and in close contact with the end face of the isolating switch transmission rod;

[0022] Connect the adjustment board to the test connection bar and connect the grounding nut with a dedicated ground wire;

[0023] Input the test current from the test connection bar and gradually increase the test voltage until it reaches the predetermined test voltage value to detect whether partial discharge occurs;

[0024] During the test, the parameters are recorded, and based on the recorded data, the characteristics of partial discharge are analyzed. The surface condition of the isolating switch transmission rod between the test static terminal and the test dynamic terminal is checked to determine whether its insulation performance is qualified.

[0025] The beneficial effect of the present invention is that, compared with the prior art,

[0026] 1. Improved efficiency

[0027] Improved test speed: Batch testing can test multiple disconnector transmission rods at the same time, which significantly improves the test speed. This helps to shorten the product inspection cycle and thus improve production efficiency.

[0028] 2. Cost Savings

[0029] (1) Improved equipment utilization: Batch testing can make full use of the capacity of test equipment, reduce equipment idle time, and improve equipment utilization.

[0030] (2) Reduce repetitive work: Batch testing reduces the steps of repeatedly setting test conditions and connecting test equipment, thereby reducing labor costs.

[0031] (3) Reduce material waste: In batch testing, test materials can be used more effectively and material waste caused by single test failure can be reduced.

[0032] 3. Quality Control

[0033] (1) Consistency inspection: Batch testing helps ensure that all disconnector transmission rods are tested under the same conditions, making it easier to detect consistency problems in the production process.

[0034] (2) Early detection of defects: Through batch testing, potential defects in the production process can be discovered early, and timely measures can be taken to correct them, thus preventing defective products from entering the market.

[0035] (3) Improve product reliability: Batch testing helps ensure that the quality of the isolating switch transmission rod meets the design requirements and improves product reliability and service life.

[0036] 4. Data Reliability

[0037] (1) Stronger statistical significance: Batch testing can provide more data samples, making it easier to discover patterns and trends among the data during statistical analysis, making the statistical results more in line with the actual situation, helping to more accurately evaluate the performance of the disconnector transmission rod and provide strong support for product improvement.

[0038] (2) Reduce random errors: Since batch tests have a large number of data samples, the impact of random errors on test results can be effectively reduced during statistical analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a front view of the present invention;

[0040] Figure 2 is a schematic diagram of the test platform of the present invention;

[0041] Figure 3 is a schematic diagram of an adjustment plate of the present invention;

[0042] Figure 4 This is a schematic diagram of an insulation test of a drive rod of a disconnector according to the present invention;

[0043] Figure 5 This is a schematic diagram of the insulation test of nine isolating switch transmission rods being carried out simultaneously in the present invention.

[0044] In the figure:

[0045] 1. Test platform; 101. Base platform; 102. Adjustment plate; 103. Adjustment nut; 104. Base; 105. Grounding nut;

[0046] 2. Isolating switch transmission rod; 3. Test static terminal; 4. Test moving terminal; 5. Test connection bar. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0048] Example 1

[0049] like Figure 1-5 As shown, a batch isolation switch transmission rod insulation test device comprises: a test platform 1, an isolation switch transmission rod 2, a test static terminal 3, a test dynamic terminal 4, and a test connection bar 5;

[0050] The test platform 1 is divided into two parts, the lower part of the test platform 1 is a base platform 101, and the upper part of the test platform 1 is an adjustment plate 102 that can be rotated to adjust the distance.

[0051] A test static terminal 3 is installed on the upper surface of 101, an adjusting nut 103 is installed on the lower surface of the base platform 101, a base 104 is also installed on the lower surface of the base platform 101, a grounding nut 105 is arranged on one side of the base 104, and the grounding nut 105 is used for grounding the test platform 1, an adjusting nut 103 is also installed on the upper surface of the adjustment plate 102, a test moving terminal 4 is installed on the lower surface of the adjustment plate 102, the base platform 101 and the adjustment plate 102 are connected through the isolating switch transmission rod 2, the test connection row 5 is used to connect the input end of the test current and the adjustment plate 102, and to connect two adjacent adjustment plates 102, and the number of the test static terminal 3, the test moving terminal 4, and the test connection row 5 are all several.

[0052] In a preferred but non-limiting embodiment of the present invention, the base platform 101 is placed on the ground, the adjustment plate 102 adjusts the distance between the test static terminal 3 and the test moving terminal 4 by rotating the adjustment nut 103, and the isolating switch transmission rod 2 is used to test and verify the insulation performance of the environmentally friendly gas inflatable cabinet at each voltage level.

[0053] In a preferred but non-limiting embodiment of the present invention, the threads on the adjusting nut 103 and the isolating switch transmission rod 2 are both trapezoidal threads, so that the adjusting nut 103 and the isolating switch transmission rod 2 have a uniform and stable linear pushing effect.

[0054] In a preferred but non-limiting embodiment of the present invention, the surfaces of the adjusting nut 103 and the isolating switch transmission rod 2 are both provided with Tr22 trapezoidal threads.

[0055] In a preferred but non-restrictive embodiment of the present invention, the base platform 101 is made of 3mm stainless steel plate, and 9 groups of Φ30 first circular holes are opened on the surface of the base platform 101. The first circular holes are used to pass through the isolating switch transmission rod 2 to facilitate the disassembly of the isolating switch transmission rod 2. The surface of the base platform 101 has 4 groups of 240×335 square holes, and the four corners of the square holes are rounded with R50, and the square holes are used to constrain the test static terminal 3.

[0056] In a preferred but non-limiting embodiment of the present invention, a load is installed on the lower surface of the base platform 101 so that the base 104 is subjected to an upward jacking load, and a notch is opened on the base 104 on the lower surface of the base platform 101, and the notch is designed for lightweight and weight reduction;

[0057] In a preferred but non-restrictive embodiment of the present invention, the test static terminal 3 and the test moving terminal 4 are both made of Φ75 copper rods, and a 55mm deep countersunk hole is opened on the upper surface of the test static terminal 3, and the countersunk hole is used to simulate the working condition of the disconnector transmission rod 2. The lower surface of the test moving terminal 4 has a 90×75×10 copper terminal, and 4 Φ10 second circular holes are opened on the surface of the copper terminal, and the copper terminal is used to install and fix the test moving terminal 4, and the second circular hole is used to pass through the disconnector transmission rod 2.

[0058] The present invention provides a batch isolation switch transmission rod 2 insulation test device, which supports at least 1 and at most 9 test connection bars 5 to perform insulation tests on isolation switch transmission rods 2 in batches, and can perform insulation tests on 3 bars according to actual needs.

[0059] Example 2

[0060] A batch isolation switch transmission rod insulation test method comprises the following steps:

[0061] When testing a single isolating switch transmission rod 2:

[0062] Step 1: Place the test platform 1 flat in the test room, install the test static terminal 3 at the first circular hole of Φ30 on the upper surface of the test platform 1, with the 55mm deep countersunk hole of the test static terminal 3 facing upward, install the isolating switch transmission rod 2 from top to bottom, keep the isolating switch transmission rod 2 in a vertical state, and then fasten the test moving terminal 4 and the adjustment plate 102 together, with the test moving terminal 4 facing downward and in close contact with the end surface of the isolating switch transmission rod 2;

[0063] Step 2, connect the adjustment board 102 to the test connection row 5, and connect the grounding nut 105 with a dedicated ground wire;

[0064] Step 3: Input the test current from the test connection bar 5, gradually increase the test voltage until it reaches the predetermined test voltage value, and detect whether partial discharge occurs;

[0065] Step 4. During the test, record the parameters such as the quantity and waveform of partial discharge. According to the recorded data, analyze the characteristics of partial discharge, such as discharge intensity and number of discharges, check the surface state of the isolating switch transmission rod 2 between the test static terminal 3 and the test dynamic terminal 4, and judge whether its insulation performance is qualified.

[0066] When testing multiple isolating switch transmission rods 2:

[0067] Step 1: Test preparation and installation

[0068] Preparation of test platform 1: Ensure that test platform 1 is stable, free of debris, and has good grounding.

[0069] Static terminal installation: Mark the position of the Φ30 first circular hole on the test platform 1 to ensure that each set of test static terminals 3 are installed in the correct position, with the countersunk holes facing upward and a depth of 55mm.

[0070] Installation of the isolating switch transmission rod 2: Install the isolating switch transmission rod 2 to be tested vertically in the test static terminal 3, ensuring that it is firmly installed without shaking.

[0071] Installation of the moving terminal and the adjusting plate 102: Fasten the test moving terminal 4 and the adjusting plate 102 together, ensuring that the test moving terminal 4 faces downward and is in close contact with the end face of the isolating switch transmission rod 2.

[0072] Safety check: Check whether all installed parts are firm and not loose to ensure that no accidents occur during the test.

[0073] Step 2: Connections and Grounding

[0074] Test connection row 5 connection: Use the dedicated test connection row 5 to reliably connect multiple groups of test adjustment boards 102 together to ensure that the current can pass smoothly.

[0075] Ground connection: Use a dedicated ground wire and ground nut 105 to reliably connect to ensure safe grounding during the test.

[0076] Grounding check: Check whether the grounding connection is firm and use a multimeter to measure the grounding resistance to ensure that the grounding is good.

[0077] Step 3: Test voltage application

[0078] Test current input: Input the test current through the test connection row 5 to ensure the current is stable.

[0079] Voltage increase: gradually increase the test voltage until it reaches the predetermined test voltage value, and closely monitor the voltage changes during the process.

[0080] Insulation test: Multiple groups of isolating switch transmission rods 2 are subjected to insulation test simultaneously to observe whether partial discharge occurs.

[0081] Step 4: Data Recording and Analysis

[0082] Partial discharge monitoring: Use a partial discharge detector to monitor and record the partial discharge parameters such as quantity and waveform.

[0083] Data analysis: Based on the recorded data, analyze the characteristics of partial discharge, such as discharge intensity, number of discharges, etc., to determine whether it exceeds the standard range.

[0084] Surface condition inspection: Check the surface condition of all isolating switch transmission rods 2 between the test static terminal 3 and the test dynamic terminal 4 to see if there are any cracks, stains or damage.

[0085] Step 5: Failure handling and retest

[0086] Insulation performance judgment: Based on the data analysis results and surface condition inspection, judge whether the insulation performance of the disconnector transmission rod 2 is qualified.

[0087] Unqualified treatment: For transmission rods that fail the insulation test, first conduct a surface condition inspection and record suspected problem points.

[0088] Preparation for retest: Clean or process the suspected unqualified isolating switch transmission rod 2 to ensure that the surface is in good condition.

[0089] Re-test: Re-test the insulation of the treated transmission rods until all transmission rods pass the test.

[0090] Safety precautions

[0091] During the entire test process, operators should wear protective equipment, such as insulating gloves, insulating shoes, etc.

[0092] There should be someone to supervise during the test to ensure the safety of the test.

[0093] After the test, the power supply should be disconnected in time and the test site should be cleaned up to ensure there are no safety hazards.

[0094] Through the above scheme, the accuracy and safety of the test of multiple isolating switch transmission rods 2 can be ensured, the test efficiency can be improved, and the test cost can be reduced.

[0095] The base platform 101 is stationary on the ground, and the adjustment plate 102 adjusts the distance between the test static terminal 3 and the test moving terminal 4 by rotating the adjustment nut 103. When the distance between the test static terminal 3 and the test moving terminal 4 is equal to 90mm, the isolating switch transmission rod 2 can be tested and verified according to the insulation performance of the 12kV environmental protection gas inflatable cabinet;

[0096] The base platform 101 is stationary on the ground, and the adjustment plate 102 adjusts the distance between the test static terminal 3 and the test moving terminal 4 by rotating the adjustment nut 103. When the distance between the test static terminal 3 and the test moving terminal 4 is equal to 210mm, the isolating switch transmission rod 2 can be tested and verified according to the insulation performance of the 40.5kV environmental protection gas inflatable cabinet;

[0097] The test platform 1 introduces current through the test connection bar 5 for testing. When one test connection bar 5 is installed, one isolating switch transmission rod 2 can be tested; when eight test connection bars 5 are selected, nine isolating switch transmission rods 2 can be tested simultaneously.

[0098] The beneficial effect of the present invention is that, compared with the prior art,

[0099] 1. Improved efficiency

[0100] Improved test speed: Batch testing can test multiple disconnector transmission rods at the same time, which significantly improves the test speed. This helps to shorten the product inspection cycle and thus improve production efficiency.

[0101] 2. Cost Savings

[0102] (1) Improved equipment utilization: Batch testing can make full use of the capacity of test equipment, reduce equipment idle time, and improve equipment utilization.

[0103] (2) Reduce repetitive work: Batch testing reduces the steps of repeatedly setting test conditions and connecting test equipment, thereby reducing labor costs.

[0104] (3) Reduce material waste: In batch testing, test materials can be used more effectively and material waste caused by single test failure can be reduced.

[0105] 3. Quality Control

[0106] (1) Consistency inspection: Batch testing helps ensure that all disconnector transmission rods are tested under the same conditions, making it easier to detect consistency problems in the production process.

[0107] (2) Early detection of defects: Through batch testing, potential defects in the production process can be discovered early, and timely measures can be taken to correct them, thus preventing defective products from entering the market.

[0108] (3) Improve product reliability: Batch testing helps ensure that the quality of the isolating switch transmission rod meets the design requirements and improves product reliability and service life.

[0109] 4. Data Reliability

[0110] (1) Stronger statistical significance: Batch testing can provide more data samples, making it easier to discover patterns and trends among the data during statistical analysis, making the statistical results more in line with the actual situation, helping to more accurately evaluate the performance of the disconnector transmission rod and provide strong support for product improvement.

[0111] (2) Reduce random errors: Since batch tests have a large number of data samples, the impact of random errors on test results can be effectively reduced during statistical analysis.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A batch isolation switch transmission rod insulation test device, characterized in that: include: Test platform, isolating switch transmission rod, test static terminal, test dynamic terminal and test connection bar; The test platform is divided into two parts, the lower part of the test platform is the base platform, and the upper part of the test platform is an adjustment plate that can rotate to adjust the distance. The upper surface of the base platform is installed with a test static terminal, and the lower surface of the base platform is installed with an adjustment nut. A base is also installed on the lower surface of the base platform. A grounding nut is arranged on one side of the base, and the grounding nut is used for grounding the test platform. An adjustment nut is also installed on the upper surface of the adjustment plate, and a test moving terminal is installed on the lower surface of the adjustment plate. The base platform and the adjustment plate are connected through an isolating switch transmission rod. The test connection row is used to connect the input end of the test current and the adjustment plate, as well as to connect two adjacent adjustment plates. The number of the test static terminal, the test moving terminal, and the test connection row are all several.

2. A batch isolation switch transmission rod insulation test device according to claim 1, characterized in that: The base platform is placed on the ground, and the adjustment plate adjusts the distance between the test static terminal and the test moving terminal by rotating the adjustment nut. Threads are arranged on the adjustment nut and the isolating switch transmission rod, and the isolating switch transmission rod is used for test verification.

3. A batch isolation switch transmission rod insulation test device according to claim 2, characterized in that: The surfaces of the adjusting nut and the isolating switch transmission rod are both provided with Tr22 trapezoidal threads.

4. The device for testing the insulation of the transmission rod of a batch disconnector according to claim 1 is characterized in that: The base platform is made of a stainless steel plate, a first circular hole is opened on the surface of the base platform, and the first circular hole is used to pass the isolating switch transmission rod, and a square hole is opened on the surface of the base platform, and the square hole is used to constrain the test static terminal.

5. The device for testing the insulation of the transmission rod of a batch disconnector according to claim 4 is characterized in that: The number of the first circular holes is 9 groups, and the specification thereof is Φ30.

6. A batch isolation switch transmission rod insulation test device according to claim 4, characterized in that: The number of the square holes is 4 groups, and the specification is 240×335. The four corners of the square holes are rounded to R50.

7. The device for testing the insulation of the transmission rod of a batch disconnector according to claim 1 is characterized in that: The lower surface of the base platform is provided with a load that causes the base to be lifted upward, and a notch is provided on the base on the lower surface of the base platform.

8. The device for testing the insulation of the transmission rod of a batch disconnector according to claim 1 is characterized in that: A 55mm deep countersunk hole is opened on the upper surface of the test static terminal, and the countersunk hole is used to simulate the working condition of the isolating switch transmission rod. A copper terminal is provided on the lower surface of the test moving terminal, and a second circular hole is opened on the surface of the copper terminal, and the copper terminal is used to install and fix the test moving terminal. The second circular hole is used to pass the isolating switch transmission rod.

9. The device for testing the insulation of the transmission rod of a batch disconnector according to claim 8, characterized in that: The test static terminal and the test dynamic terminal are both made of Φ75 copper rods, the specifications of the copper terminal are 90×75×10, and the number of the second circular holes is 4, and the specification is Φ10.

10. A method for testing the insulation of a transmission rod of a batch disconnector, based on a device for testing the insulation of a transmission rod of a batch disconnector according to any one of claims 1 to 9, characterized in that: The following steps are involved: Install the test static terminal at the first Φ30 round hole on the upper surface of the test platform, with the 55mm deep countersunk hole of the test static terminal facing upwards, install the isolating switch transmission rod, and then fasten the test moving terminal and the adjustment plate together, with the test moving terminal facing downwards and in close contact with the end face of the isolating switch transmission rod; Connect the adjustment board to the test connection bar and connect the grounding nut with a dedicated ground wire; Input the test current from the test connection bar and gradually increase the test voltage until it reaches the predetermined test voltage value to detect whether partial discharge occurs; During the test, the parameters are recorded, and based on the recorded data, the characteristics of partial discharge are analyzed. The surface condition of the isolating switch transmission rod between the test static terminal and the test dynamic terminal is checked to determine whether its insulation performance is qualified.

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