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An evaluation device and detection method for electrical aging performance of insulating materials

A technology of insulating materials and evaluation devices, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems that the performance of the material itself cannot be effectively evaluated, and achieve improved reliability, strong practicability, and simple structure Effect

Active Publication Date: 2019-06-04
NANJING NARI GROUP CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the material body cannot be effectively evaluated

Method used

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  • An evaluation device and detection method for electrical aging performance of insulating materials
  • An evaluation device and detection method for electrical aging performance of insulating materials
  • An evaluation device and detection method for electrical aging performance of insulating materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Aging tests of HPN, PA, and PBT materials at different temperatures and voltages for 1 month.

[0052] The nylon material to be tested is injection-molded into a sample tooling 9I type by an injection molding machine, and the distance between the bottom of the groove 10 and the bottom surface of the sample tooling 9 is 1 mm.

[0053] The groove 10 and the bottom surface of the sample tooling 9 are plated with silver 11, the electrodes 8 connected to the high-voltage lead wire 7 are put into the groove 10 and pressed tightly, and immersed in insulating oil, and the bottom surface of the sample tooling 9 is grounded.

[0054] The diameter D of the electrode 8 used is 40 mm, the thickness h is 2 mm, and the surface roughness is less than 1.6 um.

[0055] Repeat the above steps to put all other groups of samples into the sample chamber 2, apply a power frequency voltage of 5kV / 10kV / 15kV to the samples through the high-voltage introduction device, control the ambient humidit...

Embodiment 2

[0059] Aging test of epoxy materials at different temperatures and voltages for 1 month.

[0060] The epoxy material to be tested is formed into a sample tooling 9II by APG process, and the distance between parallel electrodes 8 is 1mm. The electrode 8 at the high voltage end of the sample tooling 9 is connected to the high voltage lead 7, and the electrode 8 at the low voltage end is grounded.

[0061] Repeat the above steps to put all other groups of samples into the sample chamber 2, apply a power frequency voltage of 5kV / 10kV / 15kV to the samples through the high-voltage introduction device, control the ambient humidity to 50%RH, and control the ambient temperature to 80°C, 100 ℃ and 120 ℃ were tested for 1 month. After 1 month, the breakdown strength of the material was tested.

[0062] The test results of breakdown strength (kV / mm) are shown in Table 2:

[0063]

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Abstract

The invention discloses an insulating material electrical aging performance evaluation device which comprises a control device, a voltage control device, a temperature control device, a humidity control device and a sample chamber equipped with a number of sample tools, wherein the voltage control device, the temperature control device and the humidity control device are connected with a high voltage introduction unit. The high voltage introduction unit comprises a high voltage bushing and a high voltage lead. The high voltage bushing is in sealed connection with the sample chamber. The high voltage lead successively passes through the high voltage bushing, and then is connected with electrodes which are connected with the high voltage ends of the sample tools. The control device adjusts the temperature and humidity in the sample chamber and the voltage aging samples of the sample tools through the voltage control device, the temperature control device and the humidity control device. The insulating material electrical aging performance evaluation device provided by the invention has the advantages of small space occupation, simple structure, convenient use, wide application range and high practicability. The test device and the detection method can effectively evaluate the electrical aging performance of an insulating material in working condition in actual operation, and provide an important reference for the screening of insulating materials.

Description

technical field [0001] The invention relates to an electrical aging performance evaluation device, in particular to an electrical aging performance evaluation device and a detection method of an insulating material under temperature and humidity control conditions. Background technique [0002] In medium and high voltage electrical equipment, polymer materials with excellent insulating properties are often used as solid insulating media. However, with the long-term operation of the equipment, complex physical and chemical changes will occur inside the insulating material, causing an irreversible and gradual decline in its insulating performance. Insulation materials are subjected to factors such as electric field, temperature, humidity, etc. These factors will cause their gradual deterioration and failure. At the same time, when these factors act synergistically, they will accelerate the aging process of insulation. Insulation aging can be divided into thermal aging, electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 蔡凡一周柏杰薛健陆德鹏
Owner NANJING NARI GROUP CORP
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