Influence of metal inclusions on AC breakdown strength in EPDM

Author

Svahn, Jorgen ; Gubanski, Stanislaw M.

Author_Institution

ABB Kabeldon, Alingsas, Sweden

fYear

1998

fDate

22-25 Jun 1998

Firstpage

498

Lastpage

501

Abstract

The aim of this work was to investigate the influence of metallic particles on the AC breakdown strength in EPDM rubber. Filled and unfilled EPDM rubbers were contaminated with two different particle sizes (50 μm and 165 μm) and different particle concentrations, to ascertain their influence on the breakdown strength. The inclusions were irregularly shaped iron particles. The breakdown tests were carried out by using ~0.7 mm thick circular rubber slabs between cylindrical electrodes. The result yielded the characteristic AC breakdown strengths of 78 kV/mm and 86 kV/mm respectively for non-contaminated filled and unfilled rubbers. The electric strength was considerably lowered for larger inclusions but not in the case of smaller ones. A statistical evaluation of the results is also provided

Keywords

electric breakdown; electric strength; ethylene-propylene rubber; filled polymers; inclusions; insulator contamination; AC breakdown strength; EPDM; Fe; filled rubber; insulation; metal inclusion; particulate contamination; Electric breakdown; Electrodes; Iron; Petroleum; Pollution measurement; Rubber; Shape; Slabs; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Solid Dielectrics, 1998. ICSD '98. Proceedings of the 1998 IEEE 6th International Conference on

Conference_Location

Vasteras

Print_ISBN

0-7803-4237-2

Type

conf

DOI

10.1109/ICSD.1998.709333

Filename

709333