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- W2893971104 abstract "Semiconductors increased power and voltage capability enable their usage in components of medium voltage grids. These components can be medium voltage AC/DC converters, which are made of a rectifier, an inverter, a transformer and another rectifier. The converter size can be reduced as well as efficiency increased, when a bipolar medium frequent rectangular voltage with a frequency between 1 and 10 kHz is applied in the intermediate circuit. Medium voltage transformers can be insulated with resin impregnated fibers, which might be used as insulation for the medium frequency transformer. The breakdown voltage of the impregnated fibers is unknown in this frequency range. Therefore, the insulation capability with respect to the breakdown voltage of the resign impregnated fibers is investigated in a frequency range between 1 and 10 kHz. The breakdown voltage of the resign impregnated Nomex 410 and Mestastar YT510 fibers decreases in the medium frequent range in contrast to 50 Hz. The reason might be a change of dielectric losses and a thermal heating of the material. Therefore, the breakdown mechanism might change from an electrical breakdown at 50 Hz to a thermal breakdown in the medium frequent range." @default.
- W2893971104 created "2018-10-05" @default.
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- W2893971104 date "2018-07-01" @default.
- W2893971104 modified "2023-10-18" @default.
- W2893971104 title "Investigation of the Breakdown Voltage of Resin Impregnated Aramid Fibers at Medium Frequency" @default.
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- W2893971104 doi "https://doi.org/10.1109/icd.2018.8470048" @default.
- W2893971104 hasPublicationYear "2018" @default.
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