CN212275539U - Insulating silicon oil electricity-moisture composite aging experimental device for cable terminal - Google Patents
Insulating silicon oil electricity-moisture composite aging experimental device for cable terminal Download PDFInfo
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- CN212275539U CN212275539U CN202021058569.0U CN202021058569U CN212275539U CN 212275539 U CN212275539 U CN 212275539U CN 202021058569 U CN202021058569 U CN 202021058569U CN 212275539 U CN212275539 U CN 212275539U
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Abstract
The utility model discloses an insulating silicon oil electricity-moisture composite aging experimental device for a cable terminal, which comprises an insulating silicon oil electricity-moisture composite aging experimental unit and an environmental humidity regulator connected with the insulating silicon oil electricity-moisture composite aging experimental unit; the insulating silicon oil electricity-humidity composite aging experiment unit comprises a sealed cavity, an oil storage tank connected with the sealed cavity, a needle electrode and a plate electrode which are oppositely arranged in the sealed cavity, and a vacuum pump connected with the sealed cavity; the environment humidity regulator comprises a three-way quartz tube and a three-way quartz tube connected with the trace moisture sample injector and the dry air bottle. The utility model discloses can realize the electric-wet compound ageing experiment of the insulating silicon oil of different little water content under the partial discharge effect, can be used to master little water content to the influence law of insulating silicon oil electricity-wet compound ageing characteristic.
Description
Technical Field
The utility model belongs to the technical field of the ageing experiment of insulating silicon oil, a little water is studied to the influence law to the compound ageing characteristic of silicon oil electricity-humidity with the help of the compound ageing decomposition gas of electricity-humidity of survey insulating silicon oil, concretely relates to cable termination is with compound ageing experimental apparatus of insulating silicon oil electricity-humidity.
Background
The high-voltage cable oil-filled terminal (hereinafter referred to as an oil terminal) takes silicon oil as an insulating medium, has the advantages of mature manufacturing process, safe and reliable operation, good heat dissipation performance, less maintenance workload and the like, and is widely applied to high-voltage cable transmission lines. However, some accidental factors, such as impurity mixing, poor lead sealing, moisture invasion and the like, may cause local electric field concentration in the oil terminal to cause silicone oil aging, thereby causing great threat to equipment and even transmission lines. Under the impact action of partial discharge high-energy particles, the insulating silicone oil is easy to decompose to generate SiO2、CO2、CO、H2And CH4、C2H2And the like. The parameters of the decomposed gas type, concentration and the like are closely related to the severity of the electro-wet composite aging and the micro-water content in the oil. Therefore, it is necessary to prepare insulating silicone oil samples with different micro-water contents in a laboratory, and further study the rule of the influence of the micro-water on the aging characteristics of the silicone oil. On the basis of the research result, the insulation state of the oil terminal is expected to be evaluated by detecting relevant parameters of the decomposed gas and correcting the detection result by combining the micro-water content.
Patent application document with application number CN201410341409.X discloses a transformer oil-paper insulation electric heating combined aging experimental facility, this experimental facility mainly includes seal chamber and the testing arrangement who is located seal chamber, its testing arrangement includes high voltage electrode, low voltage electrode and insulating paper sample, its insulating paper sample is located between high voltage electrode and the low voltage electrode, apply the voltage for the insulating paper sample through control, for the electrical aging condition of control oil-paper insulation experiment, device easy operation is convenient, can improve experiment analysis result reliability and simplify the experiment operation. The patent application document with the application number of 201811265114.3 discloses an oil paper insulating material electric-thermal combined aging test method and device, the test device mainly comprises a vacuum oven, a pin electrode, a plate electrode and the like, insulating paper boards used for testing are dried and dewatered, then the insulating paper boards in the vacuum environment are soaked in transformer oil to be made into oil paper insulating materials, then the oil paper insulating materials are subjected to thermal aging in the nitrogen atmosphere, and then the oil paper insulating materials subjected to thermal aging are placed into a partial discharge test device to be subjected to electric aging. The main defects of the existing insulating silicone oil aging technology are as follows: the electric aging experiment of the insulating silicon oil under the action of partial discharge with different strengths can be realized, the electric-wet composite aging experiment of the insulating silicon oil with different micro-water contents under the action of partial discharge can not be realized, and the electric-wet composite aging decomposed gas of the insulating silicon oil can not be collected, so that the influence rule of the micro-water content on the electric-wet composite aging characteristic of the insulating silicon oil can not be mastered.
SUMMERY OF THE UTILITY MODEL
The problem to the influence of the little moisture content of the study to the ageing characteristic of silicon oil that can not realize that exists among the current insulating oil electrical ageing experimental facilities, the utility model aims at providing a cable terminal is with insulating silicon oil electricity-wet compound ageing experimental apparatus, decomposes intracavity air moisture content through the adjustment ageing, can accurate regulation insulating silicon oil little moisture content, and then carries out the compound ageing experiment of electricity-humidity to different little moisture content insulating silicon oil.
In order to solve the technical problem, the utility model provides an insulating silicone oil electricity-moisture composite aging experimental device for a cable terminal, which comprises an insulating silicone oil aging unit and an environmental humidity regulator connected with the insulating silicone oil aging unit;
the insulating silicone oil aging unit comprises a sealed cavity, an oil storage tank connected with the sealed cavity through a pipeline provided with a valve I, a pin electrode and a plate electrode which are oppositely arranged in the sealed cavity and connected with the electric-humidity composite aging device, and a vacuum pump connected with the sealed cavity through a pipeline provided with a valve II and a vacuum meter;
the environment humidity regulator comprises a micro-moisture sampler, a dry air bottle and a three-way quartz tube connected with the micro-moisture sampler through a pipeline provided with a valve III, the left and right tube openings of the three-way quartz tube are connected with the seal chamber and the dry air bottle through a pipeline provided with a valve IV and a valve V respectively, and a sampling valve is further arranged between the seal chamber and the valve IV.
According to the insulating silicon oil electric-wet composite aging experiment device for the cable terminal, the insulating silicon oil aging unit can be externally connected with the electric-wet composite aging device, the micro water content of insulating silicon oil is adjusted through the environment humidity regulator, so that the electric-wet composite aging condition of an insulating silicon oil experiment is controlled, decomposed gas generated in the electric-wet composite aging experiment is collected through the sampling valve, physical and chemical parameters of the collected decomposed gas can be analyzed, and the influence rule of the micro water content on the characteristics of the insulating silicon oil electric-wet composite aging decomposed gas is mastered.
According to the insulating silicon oil electric-wet composite aging experimental device for the cable terminal, the side wall of the sealed cavity is provided with the fastening nut, the top end of the pin electrode extends out of the fastening nut and is provided with the voltage-sharing ball, and the differential head is further sleeved between the voltage-sharing ball and the fastening nut on the pin electrode. And a grounding support column is also arranged between the lower surface of the plate electrode and the upper surface of the bottom of the sealed cavity.
According to the insulating silicon oil electric-wet composite aging experimental device for the cable terminal, in order to further ensure the air tightness of equipment, vaseline is smeared between each pipe orifice of the three-way quartz tube and the pipeline sleeved on the three-way quartz tube, and then the three-way quartz tube is fastened by a stainless steel ribbon.
In the above apparatus for testing the electric-wet composite aging of the silicone oil for a cable termination, the micro-moisture injector is preferably a syringe with a scale and a capacity of 10 μ L to 1000 μ L. The connecting pipeline between the injector and the three-way quartz tube is preferably a plastic hose. The valve mounted on the plastic hose is preferably a movable plastic air valve.
The utility model provides an electric-wet compound ageing experimental apparatus of insulating silicon oil for cable termination has following beneficial effect:
(1) the utility model discloses an environment humidity controller that sets up and is connected with the seal chamber of the ageing unit of insulating silicon oil controls the interior air humidity of seal chamber, the little moisture content of insulating silicon oil of accurate regulation and control on insulating silicon oil-air humidity moisture balance curve basis to realized the electricity-moisture of different little moisture content insulating silicon oil and compound ageing experiment under the partial discharge effect, can be used to master little moisture content to the influence law of insulating silicon oil electricity-moisture compound ageing characteristic, through detecting the relevant parameter of decomposition gas, and combine little moisture content to revise the testing result, be expected to realize oil terminal insulating state aassessment promptly;
(2) the environment humidity regulator provided by the utility model has simple structure, the moisture is extracted by the trace moisture injector (injector) according to the using amount and injected into the three-way quartz tube, the conversion process from liquid water to gaseous water is completed under the vacuum environment, the heating temperature is low, and then the gaseous water is brought into the sealed cavity by the dry air, the process is carried out in the transparent quartz tube, the whole process is clear and visible, and the experimental reliability is further improved;
(3) the utility model discloses insulating silicon oil aging unit and environment humidity control ware are whole to be complete sealing state, make the experimental apparatus have good gas tightness, through set up the valve in many places, according to the operating procedure switching valve, make the experiment can go on under good airtight state, guaranteed insulating silicon oil seal chamber internal and external environment is isolated, thus get rid of the influence of external environment to insulating silicon oil moisture content, effectively improve the experiment precision;
(4) overall, the experimental device has the advantages of good air tightness, high adjusting precision, convenience in operation, low cost and the like, can be widely applied to insulating silicon oil micro-water content control and electric-wet composite aging experiments thereof, can realize the collection of insulating silicon oil electric-wet composite aging decomposition gas, is used for researching the insulating silicon oil electric-wet composite aging characteristics under the influence of different micro-water contents, and can provide a reliable experimental platform for the online monitoring of the insulating state of the oil filling terminal of the high-voltage cable.
Drawings
FIG. 1 is a schematic wiring diagram of an electro-wetting composite aging apparatus in an embodiment;
FIG. 2 is a schematic structural diagram of an aging unit of medium-insulation silicone oil in the embodiment;
FIG. 3 is a schematic diagram of an embodiment of an ambient humidity conditioner.
Description of reference numerals: 1. a voltage regulator; 2. an isolation transformer; 3. no partial discharge power frequency test transformer; 4. a protection resistor; 5. a resistive-capacitive voltage divider; 6. an insulating silicone oil aging unit; 7. a high-frequency current sensor; 8. an oscilloscope; 9. an oil storage tank; 10. a vacuum pump; 11. a second valve; 12. a vacuum gauge; 13. sealing the cavity; 14. a needle electrode; 15. differentiating the head; 16. a pressure equalizing ball; 17. a first valve; 18. a sampling valve; 19. a fourth valve; 20. an ambient humidity conditioner; 21. a fifth valve; 22. a pipeline; 23. a plate electrode; 24. a ground strut; 25. insulating silicone oil; 26. fastening a nut; 27. drying the air bottle; 28. a trace moisture sample injector; 29. a plastic hose; 30. a three-way quartz tube; 31. a third valve; 32. stainless steel ribbon.
Detailed Description
In order that the technical solutions of the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings, it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the present invention.
In the present embodiment, as shown in fig. 2 to 3, the insulating silicone oil electric-wet composite aging experimental apparatus for a cable terminal includes an insulating silicone oil aging unit 6 and an environmental humidity regulator 20 connected to the insulating silicone oil aging unit 6.
The insulating silicone oil electric-wet composite aging experimental device for the cable terminal is matched with a partial discharge device for use, and is externally connected with the partial discharge device through an insulating silicone oil aging unit 6. The partial discharge device is mainly used for controlling a voltage applied to the insulating silicone oil and generating a partial discharge in the insulating silicone oil, and a partial discharge device conventionally used in the art may be used for this purpose, and may be commercially available or homemade. For better understanding the utility model discloses a mode of operation, it is right to combine partial discharge device in this embodiment the utility model provides an ageing experimental apparatus explains.
As shown in fig. 1, the partial discharge device in this embodiment adopts a self-control method, and includes a voltage regulator 1, an isolation transformer 2, a non-partial discharge power frequency test transformer 3, a protection resistor 4, a resistance-capacitance voltage divider 5, a high-frequency current sensor 7, and an oscilloscope 8. The input end of the voltage regulator 1 is connected with 380V commercial power, and the output end of the voltage regulator is connected with the input end of the isolation transformer 2. The output end of the isolation transformer 2 is connected with the input end of the non-partial discharge power frequency test transformer 3. The output end of the transformer 3 for the non-partial discharge power frequency test is connected to the insulating silicone oil aging unit 6 through the protection resistor 4. The resistance-capacitance voltage divider 5 is connected in parallel with two ends of the insulating silicone oil aging unit 6 and is used for measuring high-frequency voltage applied to the insulating silicone oil aging unit 6; the RC voltage divider 5 is formed by connecting two RC parallel circuits in series. The high-frequency current sensor 7 is sleeved on the grounding wire of the insulating silicone oil aging unit 6 and used for measuring the current flowing through the insulating silicone oil aging unit 6, and the output end of the high-frequency current sensor is connected with the oscilloscope 8.
As shown in fig. 2, the insulating silicone oil aging unit 6 includes a sealed cavity 13, an oil storage tank 9 connected to the sealed cavity 13 through a pipe, a needle electrode 14 and a plate electrode 23 disposed in the sealed cavity 13 and opposing each other, and a vacuum pump 10 connected to the sealed cavity 13 through a pipe 22. And a first valve 17 is arranged on a pipeline between the sealed cavity 13 and the oil storage tank 9. The second valve 11 and the vacuum meter 12 are arranged on the pipeline 22. The sealed cavity 13 is a rectangular organic glass box, and the upper side wall of the sealed cavity is provided with a fastening nut 26. The needle electrode 14 is fixed by a fastening nut 26 and its tip protrudes out of the sealed cavity 13. The tip of the needle electrode 14 is provided with a pressure equalizing ball 16. The differential head 15 is sleeved on the outer side of the upper part of the pin electrode and is positioned between the voltage-sharing ball 16 and the fastening nut 26, and the gap distance between the pin electrode 14 and the plate electrode 23 can be accurately adjusted through the differential head 15. One end of the pin electrode 14 with the voltage-equalizing ball 16 is connected with the protective resistor 4. A grounding support 24 is also provided between the lower surface of the plate electrode 23 and the upper surface of the bottom of the sealed housing 13. The grounding strut 24 is connected to a common ground point by a ground line. The first valve 17 is a conventional ball valve, and the second valve 11 is an oil storage ball valve.
As shown in fig. 3, the ambient humidity controller 20 includes a micro-moisture injector 28, a dry air bottle 27, and a three-way quartz tube 30. The micro water sampler 28 is a commercially available 10 μ L syringe with a scale. The three-way quartz tube 30 is a flat quartz glass three-way tube with smooth inner wall, the lengths of the left and right end tube orifices of the three-way quartz tube 30 are both 20mm, the inner diameter of the tube orifice is 6mm, the wall thickness of the tube orifice is 1mm, and the length of the upper end tube orifice is 10mm, the outer diameter of the tube orifice is 2mm, and the wall thickness of the tube orifice is 0.5 mm. The water outlet end of the injector is connected with the upper end pipe orifice of the three-way quartz tube 30 through a plastic hose 29, and a valve III 31 is further installed on the plastic hose 29. The plastic hose 29 has a length of 150mm, an inner diameter of 2mm and a wall thickness of 0.2 mm. Valve three 31 is a movable plastic air valve. The left end orifice of the three-way quartz tube 30 is connected with the sealed cavity 13 through an air tube, and the right end orifice is connected with the dry air bottle 27 through an air tube. The air pipe connected with the left end pipe opening is provided with a valve IV 19, and the air pipe connected with the right end pipe opening is provided with a valve V21. And a sampling valve 18 for collecting the decomposition gas of the insulating silicon oil is also arranged on a pipeline between the valve IV 19 and the sealed cavity 13. When injecting the micro-moisture, firstly opening the valve IV 19 and the valve V21, then opening the valve III 31, and then injecting the moisture into the three-way quartz tube 30. After the water injection is finished, the third valve 31 is closed, and then the fourth valve 19 and the fifth valve 21 are closed. The fourth valve 19 and the fifth valve 21 are quick-insertion valves made of PC materials, the length is 60mm, and the inner diameter of a valve port is 10 mm. In order to enhance the air tightness of the equipment, the left end pipe orifice and the right end pipe orifice of the three-way quartz pipe 30 are inserted into the air pipe, then vaseline is coated, then the stainless steel ribbon 32 is adopted for fastening, and the upper end pipe orifice is also coated with vaseline and then the stainless steel ribbon 32 is adopted for fastening after being inserted into the plastic hose 29.
It should be noted that the dimensions of the parts such as the micro water sampler 28, the three-way quartz tube 30, and the valve can be designed according to the actual situation, and are not particularly limited. If the trace moisture injector 28 is a graduated syringe with a volume of 500 μ L; the lengths of the left and right end pipe orifices of the three-way quartz tube 30 are both 25mm, the inner diameter of the pipe orifice is 6mm, and the wall thickness of the pipe orifice is 1mm, the length of the upper end pipe orifice of the three-way quartz tube 30 is 15mm, the outer diameter of the pipe orifice is 2.2mm, and the wall thickness of the pipe orifice is 0.5 mm; the fourth valve 19 and the fifth valve 21 are both PC quick-insertion valves with the length of 60mm and the inner diameter of a valve port of 12 mm.
The following is right the utility model provides a cable termination carries out the detailed description with insulating silicon oil electricity-wet compound ageing tests device's working process to further demonstrate the utility model's advantage. The electric-wet composite aging experimental device for the insulating silicon oil for the cable terminal is used for detecting the decomposition components of the electric aging gas of the insulating silicon oil with different trace moisture contents under the set partial discharge intensity, and comprises the following specific steps:
(1) and (3) injection drying of insulating silicone oil: wiping the sealed cavity 13 to remove water on the inner wall so as to keep the sealed cavity 13 dry, sequentially closing a first valve 17 between the sealed cavity 13 and the oil storage tank 9 and a sampling valve 18 connected with the sealed cavity 13, then opening a second valve 11 between the vacuum pump 10 and the sealed cavity 13, and starting the vacuum pump 10 to vacuumize the sealed cavity 13. When the value of the vacuum meter 12 is not more than 0.01MPa, firstly closing a second valve 11 between the vacuum pump 10 and the sealed cavity 13, then closing the vacuum pump 10, then opening a first valve 17 between the sealed cavity 13 and the oil storage tank 9 to inject dry insulating silicon oil into the sealed cavity 13, and closing the first valve 17 between the sealed cavity 13 and the oil storage tank 9 after injecting the set amount to wait for the next operation.
(2) And (3) gas elimination and airtightness inspection: and opening a second valve 11 between the vacuum pump 10 and the sealed cavity 13, a sampling valve 18 between the sealed cavity 13 and the three-way quartz tube 30, a fourth valve 19 and a fifth valve 21 in sequence, then closing a third valve 31 and the ball valve of the dry air bottle, and then starting the vacuum pump 10 to vacuumize the sealed cavity 13 and the environment humidity regulator 20 connected with the sealed cavity. After 24 hours, when no bubbles emerge from the insulating silicone oil and the numerical value of the vacuum meter 12 is not more than 0.01MPa, closing the second valve 11 between the vacuum pump 10 and the sealed cavity 13, then closing the vacuum pump 10, standing for 18 hours, then observing the vacuum meter 12, when the numerical value of the vacuum meter 12 is less than 0.015MPa, determining that the air removal of the insulating silicone oil is finished and the air tightness of the equipment is good, and performing the next step of operation, otherwise, checking or replacing valves and pipelines of each unit of the equipment, and then repeating the steps to perform the air removal of the insulating silicone oil and the air tightness check of the equipment until the air removal is finished and the air tightness is good, and entering the next step.
(3) Injecting trace moisture into the sealed cavity: and (2) after the step (2) is finished, starting the vacuum pump 10, opening a second valve 11 between the vacuum pump 10 and the sealed cavity 13, vacuumizing the sealed cavity 13 and the environment humidity regulator 20 connected with the sealed cavity 13, and when the numerical value of the vacuum meter 12 is not more than 0.01MPa, closing the second valve 11 between the vacuum pump 10 and the sealed cavity 13 firstly, and then closing the vacuum pump 10. According to the balance curve of the insulating silicone oil and the air humidity and the moisture, the air humidity of the part, which is not filled with oil, of the sealed cavity 13 required for preparing the insulating silicone oil with the specific water content is obtained, and then the required injected liquid moisture content is calculated according to the volume of the part, which is not filled with oil, of the sealed cavity 13. The required liquid water content is extracted by the injector, the valve four 19 and the valve five 21 are opened, the valve three 31 is opened, and then the water is injected into the three-way quartz tube 30. After the water is filled, the third valve 31 is closed, and then the fourth valve 19 and the fifth valve 21 are closed. Heating the three-way quartz tube 30 at 60 ℃ by using a blower or an oil blowing lamp, after liquid moisture is completely gasified, sequentially opening a valve IV 19, a valve V21 and a sampling valve 18, then slowly opening a ball valve of a dry air bottle to enable dry air carrying water vapor to slowly enter the sealed cavity 13 and stop heating, when the value of the vacuum meter 12 reaches 0.1MPa, rapidly closing the ball valve of the dry air bottle, and then sequentially closing the sampling valve 18, the valve IV 19 and the valve V21. Standing the sealed cavity 13 for 72 hours to balance the moisture exchange between the insulating silicone oil and the humid air, and entering the next step;
(4) performing an electric-wet composite aging experiment and collecting aging decomposition gas: and (3) after the step (3) is finished, disconnecting the valve IV 19 and the sampling valve 18, sleeving the gas production bag on the sampling valve 18, then adjusting the pressure regulator 1 to slowly increase the experimental voltage, and synchronously observing the output waveform of the oscilloscope 8. When a discharge pulse occurs, the pressurization is stopped, the current voltage amplitude is recorded as U, and then the experimental voltage is slowly increased to 1.4U, so that the discharge occurs in the insulating silicon oil of the sealed cavity 13. Within 168 hours of discharging, stopping applying voltage every 6 hours, opening the sampling valve 18, collecting once the insulating silicon oil electricity-moisture composite aging decomposition gas through a gas production bag sleeved on the sampling valve 18, immediately closing the sampling valve 18 after each gas production is finished, increasing the external applied voltage to the same amplitude, and continuing to perform an insulating silicon oil electricity-moisture composite aging decomposition experiment, thereby finally obtaining the insulating silicon oil electricity-moisture composite aging electricity-moisture aging characteristics under the influence of different micro-water contents.
The utility model provides an ageing experimental apparatus of insulating silicon oil electricity-moisture complex for cable termination, through the external partial discharge device of the ageing unit 6 of insulating silicon oil, the little moisture content of insulating silicon oil is adjusted to rethread ambient humidity controller 20 to the electricity-moisture complex ageing condition of insulating silicon oil experiment is controlled. In addition, decomposed gas generated in the electricity-moisture composite aging experiment is collected through the sampling valve 18, physical and chemical parameter analysis can be carried out on other collected decomposed problems, the influence rule of micro-water content on the electricity-moisture composite aging characteristic of the insulating silicon oil is further mastered, and the insulating silicon oil composite aging experiment platform has the advantages of being good in air tightness, high in adjusting precision, convenient to operate, low in cost and the like, and can provide a reliable experiment platform for online monitoring of the insulating state of the oil filling terminal of the high-voltage cable.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (5)
1. The utility model provides a cable termination is with compound ageing experimental apparatus of insulating silicon oil electricity-humidity which characterized in that: the device comprises an insulating silicone oil aging unit and an environment humidity regulator connected with the insulating silicone oil aging unit;
the insulating silicone oil aging unit comprises a sealed cavity, an oil storage tank connected with the sealed cavity through a pipeline provided with a valve I, a needle electrode and a plate electrode which are oppositely arranged in the sealed cavity and connected with the local discharge loop unit, and a vacuum pump connected with the sealed cavity through a pipeline provided with a valve II and a vacuum meter;
the environment humidity regulator comprises a micro-moisture sampler, a dry air bottle and a three-way quartz tube connected with the micro-moisture sampler through a pipeline provided with a valve III, wherein a left end pipe orifice and a right end pipe orifice of the three-way quartz tube are respectively connected with the seal chamber and the dry air bottle through a pipeline provided with a valve IV and a valve V, and a sampling valve is further arranged between the seal chamber and the valve IV.
2. The electric-wet composite aging experimental device for the insulating silicone oil for the cable terminal according to claim 1, characterized in that: the side wall is provided with fastening nut on the seal chamber body, and the top of needle electrode stretches out fastening nut and is furnished with the equalizer ball, still overlaps between equalizer ball and fastening nut on the needle electrode and is equipped with the differential head.
3. The electric-wet composite aging experimental device for the insulating silicone oil for the cable terminal according to claim 1, characterized in that: and a grounding support column is also arranged between the lower surface of the plate electrode and the upper surface of the bottom of the sealed cavity.
4. The electric-wet composite aging test device for the insulating silicone oil for the cable terminal according to any one of claims 1 to 3, characterized in that: and each pipe orifice of the three-way quartz pipe is fastened with a pipeline sleeved on the three-way quartz pipe by a stainless steel binding belt.
5. The electric-wet composite aging test device for the insulating silicone oil for the cable terminal according to any one of claims 1 to 3, characterized in that: the micro-moisture sample injector is an injector with scales and the capacity of 10-1000 mu L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021058569.0U CN212275539U (en) | 2020-06-10 | 2020-06-10 | Insulating silicon oil electricity-moisture composite aging experimental device for cable terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117590119A (en) * | 2023-11-22 | 2024-02-23 | 威胜能源技术股份有限公司 | Energy-saving photovoltaic inverter testing system and application method thereof |
| CN117589976B (en) * | 2024-01-18 | 2024-04-05 | 华北电力科学研究院有限责任公司 | Method and device for measuring moisture of silicone rubber of cable terminal |
-
2020
- 2020-06-10 CN CN202021058569.0U patent/CN212275539U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117590119A (en) * | 2023-11-22 | 2024-02-23 | 威胜能源技术股份有限公司 | Energy-saving photovoltaic inverter testing system and application method thereof |
| CN117589976B (en) * | 2024-01-18 | 2024-04-05 | 华北电力科学研究院有限责任公司 | Method and device for measuring moisture of silicone rubber of cable terminal |
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