Title :
The evaluation of the early ageing period of castings made of epoxy and PUR resins
Author :
Jahn, H. ; Bärsch, R. ; Kaltenborn, U. ; Kindersberger, J.
Author_Institution :
HTWS Zittau, Univ. of Appl. Sci., Germany
Abstract :
The paper deals with the resistance of hydrophobicity on different castings made of epoxy or PUR resins. Model insulators were aged in a Modified Rotating-Wheel-Dip Test (MRWDT). The state of ageing was evaluated by on-line measurements of the leakage current and PD-measurements. The chemical changes at the surfaces were investigated with methods such as SEM, EDX, ESCA and zeta-potential. The influence of the cyclic immersion of the specimens in the electrolyte solution during the MRWDT was evaluated separately
Keywords :
ESCA; X-ray chemical analysis; ageing; casting; epoxy insulators; insulator testing; leakage currents; partial discharge measurement; scanning electron microscopy; EDX; ESCA; MRWDT; PD-measurements; PUR resins; SEM; castings; cyclic immersion; early ageing period; electrolyte solution; epoxy resin; hydrophobicity resistance; leakage current; modified rotating-wheel-dip test; on-line measurements; zeta-potential; Aging; Casting; Chemicals; Current measurement; Electrical resistance measurement; Insulation; Insulator testing; Leakage current; Resins; Surface resistance;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5035-9
DOI :
10.1109/CEIDP.1998.732993
