Title :
Discharge studies in solid insulation voids
Author_Institution :
ASEA Brown Boveri Res. Center, Baden, Switzerland
Abstract :
Partial discharge currents are studied with the aid of a digitizer for voids of various depths and constant diameter in solid insulation. Voids of 0.16, 0.32, 0.48, and 0.64 mm depth were tested. With the present arrangement, risetimes below 1 ns are measured. The results indicate a streamer mechanism taking place in the voids enclosed in solid insulation. Pedersen´s theory for ellipsoidal voids seems to agree somewhat better with experimental values than the classical capacitive model
Keywords :
partial discharges; 0.16 to 0.64 mm; 1 ns; Pedersen´s theory for ellipsoidal voids; partial discharge currents; risetimes; solid insulation voids; streamer mechanism; Capacitance measurement; Charge measurement; Circuits; Current measurement; Electrodes; Fault location; Insulation; Partial discharges; Resistors; Solids;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1990. Annual Report., Conference on
Conference_Location :
Pocono Manor, PA
DOI :
10.1109/CEIDP.1990.201350
