摘要:
The invention relates to an insulation system for a conductor of a high-voltage machine, a strip of carrier material being wound around said conductor and mica being applied thereto, and the wound strip being impregnated with a resin. The invention is characterized in that the strip comprises nanoparticles which are releasably applied to the strip.
摘要:
The invention relates to a cable, comprising a conductor surrounded by one or more layer(s), wherein at least one layer comprises a polyolefin composition comprising, - an olefin polymer (A) comprising epoxy-groups; - at least one crosslinking agent (B) which accelerates the crosslinking reaction of epoxy-groups; and - optionally a conductive filler.
摘要:
Die Erfindung betrifft einen Füllstoff zur Steuerung von elektrischen Potentialen in Transformatoren, Generatoren oder dergleichen. Der Füllstoff umfasst einen flexiblen Träger, wobei der Träger ein Imprägniermedium aufweist und das Imprägniermedium zumindest teilweise kohlenstoffbasierten Partikel enthält. Die Erfindung betrifft ebenfalls ein entsprechendes Verfahren sowie eine entsprechende Verwendung.
摘要:
A microencapsulated hardener for epoxy resins which comprises cores comprising an epoxy-resin hardener and shells covering the cores, characterized in that the epoxy-resin hardener comprises as a major component an amine adduct obtained by the reaction of an epoxy resin (e1) with an amine compound, the epoxy-resin hardener has an overall amine value of 370 to 1,000, the epoxy-resin hardener has an average particle diameter of 0.3-12 µm, excluding 0.3 µm, and the shells have, on at least the surface thereof, a combined group (x) that absorbs infrared rays having a wavenumber of 1,630-1,680 cm-1, a combined group (y) that absorbs infrared rays having a wavenumber of 1,680-1,725 cm-1, and a combined group (z) that absorbs infrared rays having a wavenumber of 1,730-1,755 cm-1.
摘要:
Die Erfindung bezieht sich auf ein Isolierharz für Schaltanlagen auf Glycidylesterbasis, enthaltend Methylnadicanhydrid / hydriertes Methylnadicanhydrid als Härter und ein N-substituiertes Imidazol als Beschleuniger. Das Harz weist eine substantiell erhöhte Glasübergangstemperatur auf bei gleichzeitig hohen mechanischen Niveau und ist sehr trackingbeständig.
摘要:
Curable epoxy resin composition, which is suitable for the production of electrical insulation systems for low, medium and high voltage applications, comprising at least an epoxy resin, a hardener, a mineral filler material, and optionally further additives, wherein (i) the epoxy resin component is a diglycidylether of bisphenol A (DGEBA); (ii) the hardener comprises methyltetrahydrophthalic anhydride (MTHPA) and polypropylene glycol (PPG), wherein (iii) the average molecular weight of the polypropylene glycol (PPG) is within the range of about 300 to about 510 Dalton; and (iv) the molar ratio of methyltetrahydrophthalic anhydride (MTHPA) to polypropylene glycol (PPG) is within the range of about 9:1 to 19:1; method of making said epoxy resin composition and electrical articles made therefrom.
摘要:
Electrical insulation system being a fiber-reinforced composite system which is suitable to be used in gas-insulated switchgear applications, comprising a solidified polymer composition and a reinforcing fiber, wherein said fiber is selected from polyethylene naphthalate fibers, polybutylene naphthalate fibers, from fibers being a copolyester of bisphenol A and/or bisphenol F with naphthalene dicarbonic acid, from fibers being a copolyester of hydroxy-benzoic acid and hydroxy-naphthoic acid, or from a mixture of these fibers, and the use of the composite system especially in the production of gas-insulated switchgear applications.
摘要:
An electrical apparatus is provided that has an electrical device encapsulated in a plastic encasement. The encasement includes an inner shell and an outer shell. The inner shell has a thickness greater than the outer shell and the inner shell is more flexible than the outer shell. The inner shell is formed from a first resin composition that, when cured, has a tensile elongation at break of greater than 5% and the outer shell is formed from a second resin composition that, when cured, has a tensile elongation at break of less than 5%.
摘要:
Disclosed is the use of the barrier property effect of nanomaterials to improve the electrical insulation resistance and corrosion protection strength properties of electromagnetic devices. The beneficial effects are realized with nanomaterial loadings of 1 -20%, and preferably between 1 - 5%, parts by weight of coating resins. Nanomaterials include, but are not limited to, silica, alumina, zirconia, and antimony pentoxide, which are dispersed either directly into a coating, or pre-dispersed in a carrier appropriate to the solvent of the resin system. Resulting formulations benefit from the fact that anti -settling agents need not be incorporated into the resin to keep the inorganic material suspended. Also, the rheology of the resin system is not significantly altered which would otherwise affect processing of the resins for their intended applications.