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Life Line Characteristics of Solid Insulation under Electrical Stress


Affiliations
1 B.E., Students, India
2 Assistant Professor, Dept of Electrical & Electronics Engg, School of Engineering and Technology, Jain University, Bangalore, India
     

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Insulating materials subjected to electrical and thermal-electrical stresses exhibit life line characteristics which show a tendency to reach an electrical threshold. Their fit is investigated with reference to several sets of data derived from accelerated life tests performed on different insulating materials.

Life line models provide the estimates of failure time percentiles at selected probabilities and stresses so that life curves at fixed failure probabilities can be drawn. These characteristics should help in the choice of compatible thermal and electrical stresses for the design of insulation systems, apparatus and components.

The tests to be conducted to plot the characteristic curves involve Class B insulation (up to 8 specimens) under three active stress levels. Subsequently, using the data acquired, the Weibull probability distribution curves are plotted using STATISTICA software.


Keywords

Scale parameter, Shape parameter, Endurance coefficient, Failure time probability, Weibull distribution.
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  • Life Line Characteristics of Solid Insulation under Electrical Stress

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Authors

Aditya Bafna
B.E., Students, India
Nirmal Shankar
B.E., Students, India
Ashish Jain
B.E., Students, India
Pravin Kothari
B.E., Students, India
Madhu Palati
Assistant Professor, Dept of Electrical & Electronics Engg, School of Engineering and Technology, Jain University, Bangalore, India

Abstract


Insulating materials subjected to electrical and thermal-electrical stresses exhibit life line characteristics which show a tendency to reach an electrical threshold. Their fit is investigated with reference to several sets of data derived from accelerated life tests performed on different insulating materials.

Life line models provide the estimates of failure time percentiles at selected probabilities and stresses so that life curves at fixed failure probabilities can be drawn. These characteristics should help in the choice of compatible thermal and electrical stresses for the design of insulation systems, apparatus and components.

The tests to be conducted to plot the characteristic curves involve Class B insulation (up to 8 specimens) under three active stress levels. Subsequently, using the data acquired, the Weibull probability distribution curves are plotted using STATISTICA software.


Keywords


Scale parameter, Shape parameter, Endurance coefficient, Failure time probability, Weibull distribution.



DOI: https://doi.org/10.33686/prj.v9i4.189539