Results 31 to 40 of about 4,473,292 (172)

Fire Testing and Hazard Assessment for Flame Retardant Polymer Composites

open access: yesSafety Science and Technology, EarlyView.
Flame retardant polymer composites are now being evaluated with more than pass or fail flammability tests. Heat release, smoke, toxicity, and system‐level behavior are receiving more attention, and multi‐scale methods are being used to describe fire hazard under more realistic conditions.
Shuheng Wang   +8 more
wiley   +1 more source

Surface flashover breakdown mechanisms on liquid immersed dielectrics [PDF]

open access: yes, 2012
Flashover formation and expansion mechanisms on the surfaces of different dielectrics immersed in transformer oil have been numerically analyzed.
Karl Borg   +9 more
core   +1 more source

Chitosan Oligosaccharide Cross‐Linked Piperazine Pyrophosphate/Melamine Polyphosphate Modified Silicone‐Acrylic Emulsion‐Based Flame‐Retardant Coating

open access: yesSafety Science and Technology, EarlyView.
Chitosan oligosaccharides, as the modifier, significantly enhances the crosslinking degree of piperazine pyrophosphate and melamine polyphosphate, enabling the composite coating to form the interpenetrating network integrating Si‐P‐C‐N during combustion.
YuPing Cao   +4 more
wiley   +1 more source

DC Flashover in Printed Circuit Boards at Low Gas Pressures: Mechanism and Mitigation Recommendations

open access: yesIEEE Access
PCB layouts with different polygon shapes and insulation distances were prepared and their surface flashover voltage subjected to different ramping rates were measured at different temperatures and different low gas pressures for emulated high-altitude ...
Jierui Zhou   +10 more
doaj   +1 more source

Novel dc flashover model for predicting flashover voltage of the iced insulators

open access: yesHigh Voltage, 2021
This work first proposes a novel flashover model based on the deduced residual resistance of the ice layer. The most important finding of the field icing tests is that the double‐layer ice‐melting water film exists on the inner and outer surfaces of the ...
Caijin Fan   +6 more
doaj   +1 more source

Effect of Bismuth Ferrite Nanometer Filler Element Doping on the Surface Insulation Properties of Epoxy Resin Composites

open access: yesNanomaterials, 2021
In the direct current electric field, the surface of epoxy resin (EP) insulating material is prone to charge accumulation, which leads to electric field distortion and damages the overall insulation of the equipment. Nano-doping is an effective method to
Jun Xie   +5 more
doaj   +1 more source

Polyaniline as a dual flame retardant and electrostatic dissipative additive in polyethylene nanocomposites

open access: yesJournal of Vinyl and Additive Technology, Volume 31, Issue 2, Page 339-355, March 2025.
Effecft of co‐doping polyaniline with phosphoric acid and phytic acid on the heat release rate of polyethylene. Abstract Polyolefins, such as polyethylene (PE), are highly flammable and electrically insulative, limiting their applicability. The study explored the flame‐retardancy and electrical conductivity of PE/polyaniline (PE/PANI) nanocomposites ...
Akeem Adisa   +4 more
wiley   +1 more source

Surface charge accumulation and pre-flashover characteristics induced by metal particles on the insulator surfaces of 1100 kV GILs under AC voltage

open access: yesHigh Voltage, 2020
With the increase in the voltage and capacitance of gas-insulated transmission lines (GILs), the insulation failure of GIL has attracted more and more attention.
Li Xing   +5 more
doaj   +1 more source

Wetting characteristics of the hydrophobic material surface through condensation

open access: yesHigh Voltage, 2023
Composite insulators are generally considered to have excellent anti‐pollution flashover performance, but recently there has been a flashover accident on the indoor clean insulator in China, which is suspected to be related to the wetting of insulators ...
Xiaohan Wu   +3 more
doaj   +1 more source

Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China

open access: yesHigh Voltage, EarlyView.
ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li   +9 more
wiley   +1 more source

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