Results 261 to 270 of about 11,340 (302)

Electrical breakdown strength of XLPE cables under combined AC-DC voltage

Proceedings IEEE Southeastcon '95. Visualize the Future, 2002
This paper presents data on electrical breakdown strength of 5 kV XLPE cable under AC voltages, DC voltages, and superimposed AC upon DC voltages. In the latter case, the ratio of the AC to DC voltage components (p=Vac/Vdc) was varied between the limits of 0 ...
S. Grzybowski, R.L. McMellon
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DC-breakdown strength of liquid nitrogen under different voltage ramp conditions

Proceedings of 1999 IEEE 13th International Conference on Dielectric Liquids (ICDL'99) (Cat. No.99CH36213), 2003
The prospective use of superconductors with high critical temperature in power electricity needs information about the long term dielectric strength performance in large insulation systems. Liquid nitrogen is a promising cooling and basic insulating agent for fluid-transparent dielectric structures in power apparatus using superconductors with high ...
J. Gerhold, M. Hubmann, E. Telser
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Manipulating Cis‐Trans Copolymer Chain Conformation to Simultaneously Improve Permittivity and DC Breakdown Strength in Polythiourea

Macromolecular Rapid Communications, 2023
AbstractPolythioureas (PTUs) show great potentials for applications in the new generation of film capacitors due to their excellent dielectric properties. Herein, the cis‐trans copolymer chain of PTU is successfully tailored by employing cis and trans cyclohexyl spacers.
Liuhao Jiang, Xia Liu, Shichun Hu, Mingru Li, Liuqing Yang, Yang Feng, Shengtao Li   +6 more
openaire   +2 more sources

Iron particle effect on the breakdown strength of insulating oil at AC and DC voltages

2017 IEEE Electrical Insulation Conference (EIC), 2017
The metallic particles originating from the process of installation and operation of converter transformers can affect the insulating performance of transformer oil when subjected to electric field containing DC component and may cause discharge accidents.
null Yuncai Lu, null Peng Wu, null Fengbo Tao, null Xi Li, null Liwei Zhou   +4 more
openaire   +1 more source

Temperature dependence of AC / DC breakdown strength of HVDC XLPE cable slices

2016 International Conference on Condition Monitoring and Diagnosis (CMD), 2016
Crosslinked polyethylene (XLPE) has been used for nearly sixty years for its high breakdown strength, low dielectric loss, good thermal stability and excellent mechanical performance. Since the good performances provided by HVAC polymeric cables, related research on HVDC XLPE cables has attracted much attention.
null Liu Xia, null Yu Qinxue, null Liu Minghao, null Zhang Kai, null Zhong Lisheng   +4 more
openaire   +1 more source

Study on AC/DC Breakdown Strength and Space Charge of Nano-MgO /Polypropylene Composite

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2020
The electrical and thermal characteristics of isotactic polypropylene (i-PP) are revealed to be superior to polyethylene (PE), and i-PP is suitable for recycle use as the recent environmental requirement. The electrical characteristics of nano-filler/PP composite are investigated and studied in this paper.
Zhe Li, Gehao Sheng, Xiuchen Jiang
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Influence of a dielectric barrier on the dc and ac breakdown strength of a point-to-plane gap in air

1984 IEEE International Conference on Eletrical Insulation, 1984
The breakdown voltage of an air insulated nonuniform field gap can be increased by placing a barrier, i.e. a plane sheet of insulating material, between the electrodes normal to the gap axis. This paper reports on the results of an experimental study of the influence of the location of a barrier on the breakdown voltage of a number of point-to-plane ...
P.A. Bruyn, R.G. van Heeswijk
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Breakdown strength measurements on cylindrical polyvinyl chloride sheaths under AC and DC voltages

IEEE Transactions on Dielectrics and Electrical Insulation, 2014
In this work, we study the effect of the applied voltage form and its rise speed on breakdown voltage of polyvinyl chloride sheaths. We first present the statistical model of Weibull used for processing the results, then we describe the experimental devices.
Laifaoui, Abdelkrim, Herzine, Mohend Seghir, Zebboudj, Youcef, Reboul, Jean-Michel, Nedjar, Mohammed   +4 more
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Study on the difference of DC breakdown strength between XLPE and LDPE

IET Conference Proceedings, 2022
Y. Bai, S. Wang, L. Yang, J. Li, S. Li, S. Wang, D. Pan   +6 more
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Investigation on the Breakdown Strength of Aged Special Layered Silicone Dielectrics under DC Stres

2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2019
In polymeric insulations space charges tend to form under DC voltage stress. Consequently, at a polarity reversal of the voltage, the electric field is intensified locally, which accelerates the aging of the insulation and can lead to the destruction of the insulating material in the worst case.
Mirnes Aganbegovic, Peter Werle
openaire   +1 more source