Strength investigations on long oil gaps

W. Lick1, M. Muhr1
1Technical University Graz, Graz, AUSTRIA

Tóm tắt

We deal with the electrical strength properties of oil gaps. The investigations were carried out with uniform electrical fields and electrode distances up to 30 mm. Measurements were performed with alternating current (50 Hz), lightning impulses and switching impulses. Such investigations usually have a relative high dispersion of the measurement values. It will be shown that it is possible to minimize the coefficient of variation to values of about 5 to 6 percent.

Từ khóa

#Petroleum #Testing #Electrodes #Breakdown voltage #Electric breakdown #Dispersion #Security #Safety #Gaussian distribution #Shape measurement

Tài liệu tham khảo

10.1007/978-3-642-61633-4 moser, 1987, Transformer board II Styria Graz, 121 fryxell, 1966, Determination of critical witdstand voltages, 21st Meeting of the CIGRE, 3, 423 10.1109/T-PAS.1977.32523 0, Part 1, IEC 60–1 High-voltage test techniques, 91 moser, 1979, Transformerboard Scientia Electrica, 50