Mechanical characteristics of class-F groundwall insulation tapes for stator windings

고정자 권선용 F종 주절연테이프의 기계적 특성

  • Kim, Tae-Hee (R & D Center, Doosan Heavy Industries & Construction Co., Ltd.) ;
  • Kang, Myung-Guk (Turbine Generator BG, Doosan Heavy Industries & Construction Co., Ltd.) ;
  • Lee, Jai-Kwun (Turbine Generator BG, Doosan Heavy Industries & Construction Co., Ltd.) ;
  • Son, Sam-Young (Turbine Generator BG, Doosan Heavy Industries & Construction Co., Ltd.)
  • 김태희 (두산중공업(주) 기술연구원) ;
  • 강명국 (두산중공업(주) 터빈발전기BG) ;
  • 이재권 (두산중공업(주) 터빈발전기BG) ;
  • 손삼용 (두산중공업(주) 터빈발전기BG)
  • Published : 2004.07.14

Abstract

Class-F resin-rich type insulating tapes are generally used for the groundwall insulations of the large turbine generators with air-cooled and hydrogen-cooled stator windings. In this paper, mechanical strength properties degraded over aging time in higher temperature than designed one in normal condition were experimentally investigated and the results of comparative tests were presented on the existing class-F resin-rich type tape and a developed one after curing. The resin-rich insulating tapes with composite material of Mica/Epoxy/support currently were used in this test. The tests for tensile and flexural strength properties were conducted with the specimens which were composed of unaged and the aged specimens accelerated for one, two, and three thousand hours at 180 $^{\circ}C$. The tensional strength was only measured for the unaged specimens and the results are also presented to make a comparative test for their initial mechanical characteristics.

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