Experiment and analysis method of insulation life of power supply cable polymer material

A technology of polymer materials and insulation life, which is applied in the direction of weighing by removing certain components, can solve the problems of loss of use value, inability to evaluate thermal stability of polymer materials, inaccuracy, etc., and achieve short experiment cycle , avoid circuit fires, and the effect of simple calculation

Inactive Publication Date: 2016-09-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after the first test, the test data of the next 3 or 4 tests will be inaccurate, and the use value will be lost. Therefore, DSC cannot be used to evaluate the thermal stability of polymer materials, that is, it cannot be used for insulating materials. Prediction of the thermal aging life of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The experimental method and analysis of the insulation life of polymer materials for power cables include the following steps:

[0060] The first step is to weigh the cable polymer material, which is cross-linked polyethylene;

[0061] In the second step, put the sample into the thermal analyzer, and heat the experiment according to the set program;

[0062] The third step is to determine the cable failure index;

[0063] The fourth step is to intercept the experimental data on the thermogravimetric curve according to the failure index determined in the third step;

[0064] The fifth step is to plot and solve with the experimental data;

[0065] The sixth step is to establish the life-time equation and analyze and calculate it.

[0066] The seventh step is to calculate the life of the cable under service temperature conditions.

[0067] The weighing described in the first step is to weigh 5 parts of the cable polymer material, the mass of which is equal to 7 mg.

...

Embodiment 2

[0075] The experimental method and analysis of the insulation life of polymer materials for power cables include the following steps:

[0076] The first step is to weigh the cable polymer material, which is polyimide;

[0077] In the second step, put the sample into the thermal analyzer, and heat the experiment according to the set program;

[0078] The third step is to determine the cable failure index;

[0079] The fourth step is to intercept the experimental data on the thermogravimetric curve according to the failure index determined in the third step;

[0080] The fifth step is to plot and solve with the experimental data;

[0081] The sixth step is to establish the life-time equation and analyze and calculate it.

[0082] The seventh step is to calculate the life of the cable under service temperature conditions.

[0083] The weighing described in the first step is to weigh 5 parts of the cable polymer material, the mass of which is equal to 8 mg.

[0084] The sampl...

Embodiment 3

[0091] The experimental method and analysis of the insulation life of polymer materials for power cables include the following steps:

[0092] The first step is to weigh the cable polymer material, which is polyvinyl chloride;

[0093] In the second step, put the sample into the thermal analyzer, and heat the experiment according to the set program;

[0094] The third step is to determine the cable failure index;

[0095]The fourth step is to intercept the experimental data on the thermogravimetric curve according to the failure index determined in the third step;

[0096] The fifth step is to plot and solve with the experimental data;

[0097] The sixth step is to establish the life-time equation and analyze and calculate it.

[0098] The seventh step is to calculate the life of the cable under service temperature conditions.

[0099] The weighing described in the first step is to weigh 5 parts of the cable polymer material, the mass of which is equal to 9 mg.

[0100] T...

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PUM

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Abstract

The invention provides an experimental method and analysis of the insulation life of the polymer material of the power supply cable, including: weighing the cable to be tested; determining the failure index of the cable, and the failure index is: 10% of the weight loss of the cable is failure; In the instrument, measure the absolute temperature when the cable under test fails at different heating rates; according to the pyrolysis kinetics reaction rate equation and the Amhenius equation, establish the corresponding functional relationship between the service life t of the cable under the service temperature and the service temperature T , that is, the service life t of the cable under the condition of service temperature T; the cable is a polymer insulating material. Using the experimental method of the invention can realize the life experiment, and by establishing and analyzing the corresponding function relation between t and T, the service life of the cable under the service temperature condition can be obtained. This is crucial to correctly assessing and predicting the aging and life of the line, avoiding circuit fires, and ensuring the safety of life and property of the country and people.

Description

technical field [0001] The invention belongs to the field of experiment and analysis of insulation life, and in particular relates to an experiment method and analysis of insulation life of polymer materials of power supply cables. Background technique [0002] Now homes, offices, hotels, entertainment, workshops and other places use more and more lighting, home appliances, office equipment, production facilities and other power facilities, and the load capacity is also increasing, so the power supply lines used more and more. For a long time, the aging and life of power supply lines cannot be correctly assessed, so that it is impossible to accurately know which lines are aging and have reached the end of their service life, and new cables must be replaced. Otherwise, it may cause a breakdown short circuit, or even cause a circuit fire. So far, there have been many fires caused by aging cables. Therefore, the cable aging life test must be highly valued, which is crucial t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 耿贵立白玉俊
Owner SHANDONG UNIV
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