Abstract
In the present study, the breakdown and aging performance of two PBT materials at different environmental conditions are under investigation. For this purpose, the electrical short-term strength is determined for AC and DC with two different voltage slopes (0,2 kV/s, 2 kV/s). Starting from the dielectric strengths with slow voltage increase, levels for long-term stress were selected. Afterwards, aging investigations under T = 25 ℃, H = 50% relative humidity (r. h.) and T = 85 ℃, H = 85% r. h., took place. The results show clear differences in the short-term and long-term electrical strength of both materials, although they have a nominal identical material composition (glass fibers, flame retardants, etc.). By analyzing the lifetime characteristics, either of both materials shows a significantly better behavior.
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Acknowledgments
The authors would like to thank the European ECPE network for funding the basic work of this paper via the “ECPE Joint Research Programme”.
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Wels, S., Boettge, B., Bernhardt, R., Klengel, S., Claudi, A. (2020). Dielectric Strength and Aging Performance of Polybutylene Terephthalate (PBT) Under the Influence of Temperature and Humidity. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 599. Springer, Cham. https://doi.org/10.1007/978-3-030-31680-8_48
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DOI: https://doi.org/10.1007/978-3-030-31680-8_48
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