Breakdown Characteristics of Non-Uniform Gaps In SF6 under Fast Oscillating Impulse Voltages

H. Fujinami,E. Kuffel

doi:10.1007/978-1-4615-3706-9_30

Breakdown Characteristics of Non-Uniform Gaps In SF6 under Fast Oscillating Impulse Voltages

H. Fujinami, E. Kuffel

https://doi.org/10.1007/978-1-4615-3706-9_30

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Publication Date: Jan 1, 1991

Citations: 6

Affiliation: Central Research Institute of Electric Power Industry, University of Manitoba

#Very Fast Transient Overvoltages #Gaps In SF6 + Show 8 more

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Abstract

The paper presents breakdown characteristics of non-uniform field gaps in SF6 gas under voltages simulating very fast transient overvoltages (VFTO) generated by the operation of a disconnect switch in GIS. The results presented show that the breakdown voltages under the VFTO remain higher than the corresponding values obtained under standard lightning impulse voltages. However, the voltage-time characteristics for the VFTO fall below the lightning impulse V-t characteristics especially at the higher gas pressure. The effect of corona discharge on the breakdown characteristics for VFTO superimposed upon dc voltage is also reported.

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