Assessment of deterioration in epoxy/mica machine insulation

Author

Kim, Y.J. ; Nelson, J.K.

Author_Institution

Dept. of Electr. Power Eng., Rensselaer Polytech. Inst., Troy, NY, USA

Volume

27

Issue

5

fYear

1992

Firstpage

1026

Lastpage

1039

Abstract

Long-time accelerated aging tests in a laboratory environment have been conducted on generator stator insulation to identify meaningful diagnostic measures for the assessment of degradation and identification of aging mechanisms. A plurality of techniques are investigated and diagnostic parameter, the dynamic stagnation voltage, which appears to be correlated with delimination in the epoxy-mica structure, is proposed. The results provide a basis for an online interpretation method for insulation condition.<>

Keywords

ageing; composite insulating materials; computerised monitoring; life testing; machine insulation; organic insulating materials; accelerated aging tests; aging mechanisms identification; degradation assessment; delimination; diagnostic measures; dynamic stagnation voltage; epoxy-mica structure; generator stator insulation; insulation condition; laboratory environment; long term testing; machine insulation; online interpretation method; plurality of techniques; Accelerated aging; Dielectric loss measurement; Dielectrics and electrical insulation; Electric variables measurement; Insulation testing; Laboratories; Pulse measurements; Stators; Thermal stresses; Voltage;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.256478

Filename

256478