Zobrazeno 1 - 10
of 14
pro vyhledávání: '"H. M. Wilhelm"'
Autor:
H. M. Wilhelm, P. O. Fernandes, L. P. Dill, K. G. Moscon, M. A. Marin, G. F. Moraes, T. B. Marchesan, V. C. Bender
Publikováno v:
2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP).
Autor:
H. M. Wilhelm, P. O. Fernandes, L. P. Dill, K. G. Moscon, C. Steffens, S. M. Peres, V. C. Bender, T. B. Marchesan, J. B. Ferreira Neto
Publikováno v:
2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP).
Publikováno v:
2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP).
Autor:
R. P. Marek, H. M. Wilhelm, M. Ziliotto, C. Steffens, Kethlyn G. Moscon, S. M. Peres, Paulo O. Fernandes
Publikováno v:
2020 IEEE 3rd International Conference on Dielectrics (ICD).
This paper presents the development of a “modified Degree of Polymerization test method” based on IEC 60450 for the DuPont™ Nomex® 910, engineered cellulose composite paper. In order to check how retained tensile strength corresponds to the DP
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 22:2703-2708
The main objective of this study was to evaluate the effect of transformer construction materials, such as kraft insulation paper, varnish, core steel and gasket materials (rubber), on the physicochemical properties of natural ester-based insulating
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 22:864-868
The Rancimat method was used to evaluate the consumption of antioxidant additive in a natural ester insulating fluid (NEI). NEI samples were aged in the laboratory with and without oxygen bubbling. NEI samples were also collected from a transformer i
Dissolved gas analysis (DGA) of natural ester insulating fluids with different chemical compositions
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 21:1071-1078
This study presents experimental results of the application of the dissolved gas-inoil analysis (DGA) technique to natural ester insulating fluids. The investigations covered two common types of transformer faults, discharge and overheating, and four
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 20:1395-1401
Three types of edible natural ester oils (soya, rice and sunflower) were aged with and without antioxidant additives. The properties of these aged oils were analyzed in comparison with a commercial natural ester insulating product (Biovolt A). Dissol
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 20:128-134
The degradation of in-service natural ester-based insulating fluid could result in oil viscosity, acidity and dissipation factor increases. In this work, natural ester-based insulating fluid samples aged in the laboratory and in-service (collected fr
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 18:714-719
In this work, the degradation process of natural ester-based insulating fluids was evaluated through laboratory aging tests. Two distinct aging methodologies were used: natural ester-based insulating fluids were placed in sealed flasks at 120°C in t