Results 31 to 40 of about 11,340 (302)

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

open access: yes, 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

Investigation on Charge Transport in Polypropylene Film under High Electric Field by Experiments and Simulation

open access: yesEnergies, 2021
The charge transport in polypropylene was studied under DC electric fields at different temperatures. By the experimental measurement and simulation of the BCT model, we studied conduction currents, breakdown strength, and space charge distribution.
Xiying Dai   +5 more
doaj   +1 more source

DC Dielectric Breakdown Behavior of Thermally Sprayed Ceramic Coatings

open access: yes, 2015
Previous studies of dielectric properties of thermally sprayed insulating ceramic coatings are focused on linearly ramped dielectric breakdown strength as well as DC resistivity, relative permittivity and dielectric loss characterizations.
Suhonen, Tomi   +3 more
core   +2 more sources

DC Breakdown Strength of HVDC XLPE Cable Insulation – Short-term testing of cable peelings [PDF]

open access: yes, 2023
I sammenheng med elektrifisering av dagens samfunn, som fører til høyere elektrisitetsbehov og et mål om bærekraftige løsninger, er ekstruderte høyspennings-likestrømskabler (HVDC-kabel) en nøkkelfaktor.
Eilertsen, Anja Kjærnes
core  

Dielectric behaviours of bio‐derived epoxy resins from cashew nutshell liquid

open access: yesHigh Voltage, 2021
In this study, four commercially available bio‐derived epoxy systems (extracted from cashew nutshell liquid) were prepared and characterised. The glass transition temperature (T g), dielectric spectroscopy, DC conductivity and breakdown properties of ...
Mulan Mu, Alun Vaughan
doaj   +1 more source

Failure mechanisms of polyimide and perfluoroalkoxy films under high frequency pulses [PDF]

open access: yes, 2010
Breakdown behaviors of polyimide and perfluoroalkoxy high temperature films under unipolar and bipolar repetitive pulses are investigated. A bipolar 20kV, 20 kHz and fast dV/dt pulse generator has been designed and built to study the impact of pulse ...
Yin, Weijun   +9 more
core   +1 more source

Design of ultrabright 270 keV DC photoelectron gun for ultrafast electron diffraction

open access: yesAIP Advances, 2020
Compact DC photoelectron guns of high-voltage are highly desired to output ultrabright and ultrashort electron pulses for accessing irreversible processes by using the ultrafast electron diffraction (UED) technique.
Jing Yang   +3 more
doaj   +1 more source

Effects of Fiber and Copper Particles on Conductivity and Breakdown Characteristics of Natural Ester and Mineral Oil under DC Voltage

open access: yesEnergies, 2020
The converter transformer is a key equipment in high voltage direct current (HVDC) transmission system. Its oil-paper insulation system in the valve winding and outlet bushing experiences AC, DC, AC/DC, and transient impulse voltages simultaneously.
Lin Cheng   +6 more
doaj   +1 more source

Experimental studies of influence of DC and AC electric fields on bridging in contaminated transformer oil

open access: yes, 2015
Analysis of real operating condition revealed that HVDC transformers experience combined effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated transformer oil under the influence of DC, AC and DC biased AC electric ...
Mahmud, S.   +4 more
core   +1 more source

Breakdown Voltage of Polymeric HVDC Insulation at DC Stress and Superimposed Lightning Impulse Voltages

open access: yes, 2022
Space charge formation makes it difficult to predict the resulting electric field distribution within HVDC cable insulation. The main purpose of the work presented here has been to experimentally study how the lightning impulse breakdown strength of ...
Olsen, Espen Torlei   +2 more
core   +1 more source

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