Title :
Ageing of rotating machines insulation-mechanisms, measurement techniques
Author :
Fruth, B. ; Liptak, G. ; Ullrich, L. ; Dunz, T. ; Niemeyer, L.
Author_Institution :
Asea Brown Boveri Corp. Res., Baden, Switzerland
Abstract :
The long-term ageing of insulator models until breakdown was investigated with repetitive diagnostic measurements. The physical mechanisms in models with isolated defects were examined, and improved diagnostic tools were developed on the basis of the ageing experiments. Experimental results on the properties of a mica paper, glass fiber, and epoxy resin composite are presented. The authors discuss the effect of temperature on ageing and especially on defect induction by thermomechanical forces
Keywords :
ageing; composite insulating materials; electric breakdown of solids; filled polymers; glass fibres; insulation testing; machine insulation; mica; paper; partial discharges; permittivity; defect induction; diagnostic tools; electric breakdown; epoxy resin composite; glass fiber; insulator models; long-term ageing; measurement techniques; mica paper; partial discharges; repetitive diagnostic measurements; rotating machines insulation; temperature dependence; thermomechanical forces; Aging; Delamination; Dielectric measurements; Dielectrics and electrical insulation; Glass; Measurement techniques; Partial discharge measurement; Rotating machines; Temperature; Thermal stresses;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1989., Proceedings of the 3rd International Conference on
Conference_Location :
Trondheim
DOI :
10.1109/ICSD.1989.69266
