Results 41 to 50 of about 2,602,019 (170)

Space charge and its impact on DC breakdown of polymeric materials

, 2013
The presence of space charge will lead to distortion of electric field distribution within the dielectric material, resulting electric field enhancement in certain region of the dielectric. The electric field enhancement could cause material degradation,
Chen, George
core   +1 more source

Copper Particle Effect on the Breakdown Strength of Insulating Oil at Combined AC and DC Voltage [PDF]

Journal of Electrical Engineering and Technology, 2017
Converter transformer is the key equipment of high voltage direct current transmission system. The solid suspending particles originating from the process of installation and operation of converter transformer have significant influence on the insulation performance of transformer oil, especially in presence of DC component in applied voltage.
You-Yuan Wang, Yuan-Long Li, Chao Wei, Jing Zhang, Xi Li   +4 more
openaire   +1 more source

Cold cracking in DC-cast high strength aluminum alloy ingots: An intrinsic problem intensified by casting process parameters [PDF]

, 2011
For almost half a century the catastrophic failure of direct chill (DC) cast high strength aluminum alloys has been challenging the production of sound ingots.
A. Ten Cate, Lalpoor, M, Katgerman, L., Ten Cate, A., Ontijt, N. (author), Katgerman, L. (author), D. Ruvalcaba, N. Ontijt, Eskin, D.G. (author), Eskin, DG, Eskin, D.G., Fjaer, H.G. (author), Ruvalcaba, D, Ruvalcaba, D., D.G. Eskin, Lalpoor, M. (author), H.G. Fjær, Ten Cate, A, Ruvalcaba, D. (author), Ontijt, N., M. Lalpoor, Ontijt, N, Ten Cate, A. (author), L. Katgerman, Katgerman, L, Lalpoor, M., Fjaer, H.G., Fjaer, HG   +27 more
core   +2 more sources

Structure and electrical properties of silica-based polyethylene nanocomposites

, 2013
The topic of polymer nanocomposites remains an active area of research in the dielectrics community, due to the unique electrical properties that these materials could exhibit. To explain the behaviour of these materials, the importance of clarifying the
Lau, K.Y.
core   +1 more source

The effects of hydration on the DC breakdown strength of polyethylene composites employing oxide and nitride fillers [PDF]

IEEE Transactions on Dielectrics and Electrical Insulation, 2017
Particle dispersion, water absorption/desorption and electrical breakdown behavior were studied in a range of polyethylene composites having a common matrix morphology. Three different conditioning routes (dry, ambient and wet) were used to vary the absorbed water content.
Hosier, Ian, Praeger, Matthew, Vaughan, Alun, Swingler, Steven   +3 more
openaire   +2 more sources

Experimental Study on Breakdown Characteristics of Transformer Oil Influenced by Bubbles

Energies, 2018
Bubbles will reduce the electric strength of transformer oil, and even result in the breakdown of the insulation. This paper has studied the breakdown voltages of transformer oil and oil-impregnated pressboard under alternating current (AC) and direct ...
Chunxu Qin, Yan He, Bing Shi, Tao Zhao, Fangcheng Lv, Xiangrui Cheng   +5 more
doaj   +1 more source

The effects of crosslinking byproducts on the electrical properties of low density polyethylene

, 2011
Crosslinked polyethylene (XLPE) is widely used for high voltage insulation in power transmission systems. However, it has been found that, after crosslinking with Dicumyl Peroxide (DCP), the crosslinking byproducts such as acetophenone, ?-methylstyrene ...
Hussin, Nuriziani
core   +1 more source

DC Tangential Electric Breakdown Strength of Silicone Rubber Interfaces under dry, wet and oily conditions [PDF]

, 2016
This research work is a part of an on-going project at NTNU/SINTEF-Energy Research aim- ing at developing new criteria for design of compact high voltage subsea connectors.
Hammerøy, Ole Andre
core   +1 more source

Experimental study of polymeric cable insulation under DC-superimposed long temporary overvoltage and lightning impulse voltage stress

Materials Research Express
Fault events in high-voltage direct current (DC) cable systems can generate DC-superimposed long temporary overvoltages (DC-LTOVs), same-polarity impulses that create stress conditions different from those in conventional superimposed lightning impulse ...
Robert Gerlach, Till Scholz, Willem Leterme, Bastian Soppe, Tanumay Karmokar, Isabella Nett, Dominik Häring   +6 more
doaj   +1 more source

Mitigation of electrical treeing at high temperature in nano‐SiO2 doped epoxy resin

High Voltage, 2023
In this work, electrical tree inception and ageing experiments were conducted to investigate the initiation, growth characteristics and structural characteristics of electrical trees of nano‐SiO2 doped epoxy resin at different temperatures.
Yuanyuan Li, Yang Yang, Shuangshuang Yan, Zhipeng Lei, Meiqing Guo   +4 more
doaj   +1 more source