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Description
  • Výkonoví transformátory jsou nezastupitelnou skupinou všech elektrických aplikací s dvousložkovým izolačním systémem. Jednou složkou je tekuté médium, které zajišťuje izolační a chladící funkci. Může jí být syntetický, nebo minerální olej. Druhou složkou je organická složka na bázi celulózy. Pro materiálové zkušebnictví je možno použít dva přístupy. Jedním je použití strukturálních analýz a druhým klasické zkoušení s elektrických vlastností. V případě tohoto článku jsou měřeny vzorky stárnuté při teplotě 90 °C po dobu 50 až 3000 hodin. Měřeny byly časové závislosti ztrátového činitele, polarizační index, permitivita a izolační odpor. (cs)
  • Power transformers are inconsiderable group of the electrical appliances with two components insulation system. One of the components - liquid insulating medium plays two roles- insulating and cooling. It can be mineral as well as synthetic based liquid. Second component is an organic based solid insulation usually of cellulose character. It is possible to follow two approaches for the materials evaluation. One of the ways is direct observation of the structure changes; structural approach. Second is response observation of the deteriorated materials. This is provided due to the electrical parameters measurement. Insulation materials are subjected to fastened aging process. In this case the fastened aging is provided by increasing the temperature to 90 °C for the times 50 to 3000 hours. Measured were time dependencies of the dissipation factor, polarization index, permittivity and insulation resistance.
  • Power transformers are inconsiderable group of the electrical appliances with two components insulation system. One of the components - liquid insulating medium plays two roles- insulating and cooling. It can be mineral as well as synthetic based liquid. Second component is an organic based solid insulation usually of cellulose character. It is possible to follow two approaches for the materials evaluation. One of the ways is direct observation of the structure changes; structural approach. Second is response observation of the deteriorated materials. This is provided due to the electrical parameters measurement. Insulation materials are subjected to fastened aging process. In this case the fastened aging is provided by increasing the temperature to 90 °C for the times 50 to 3000 hours. Measured were time dependencies of the dissipation factor, polarization index, permittivity and insulation resistance. (en)
Title
  • Electrical properties propagation of exposed combined insulation
  • Elektrické vlastnosti kombinované izolace (cs)
  • Electrical properties propagation of exposed combined insulation (en)
skos:prefLabel
  • Electrical properties propagation of exposed combined insulation
  • Elektrické vlastnosti kombinované izolace (cs)
  • Electrical properties propagation of exposed combined insulation (en)
skos:notation
  • RIV/49777513:23220/08:00500445!RIV09-MSM-23220___
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  • Z(MSM4977751310)
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  • 365747
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  • RIV/49777513:23220/08:00500445
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  • petroleum-based oils; synthetic fluids; dissipation factor; polarization index; permittivity; insulation resistance (en)
http://linked.open.../riv/klicoveSlovo
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  • [A25F4EE3E7BA]
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  • Poitiers
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  • New York
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  • 16th IEEE International Conference on Dielectric Liquids ICDL 2008
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  • Mentlík, Václav
  • Pihera, Josef
  • Prosr, Pavel
  • Trnka, Pavel
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number of pages
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  • IEEE
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  • 978-1-4244-1586-1
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  • 23220
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