Investigation of dielectric breakdown probability distribution for vacuum disconnecting switch

Shioiri, T.; Sasage, Kosuke; Kamikawaji, T.; Homma, M.; Kaneko, Eiji

doi:10.1109/tdc.2002.1177725

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…Shioiri et al [7] studied the dielectric behaviour of vacuum disconnectors. Although similar results are obtained, they used a different test method in which the voltage was applied progressively using the so-called step-up method without mechanical operation of the interrupter.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Vacuum switch-disconnectors : 1. Dielectric behaviour

Schellekens

Henon

Picot

2008

2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum

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This study on vacuum switch-disconnectors addresses two major questions : dielectric behaviour of the VI and the reliability in a practical situation. In the experimental study, the ageing of a specially designed vacuum switch-disconnector is studied. Several internal design parameters (shape of the shields, contacts and contact gap) are varied. The ageing of VI's is simulated by no-load switching, by load current switching as well as short-circuit closing; the dielectric behaviour is analysed by applying a lightning impulse voltage after each operation. A total of 200 operations are performed on each single VI out of a series of 10 interrupters. It is demonstrated that : (1) No-load switching and nominal current switching don't change the dielectric behaviour; the breakdown probability can be described by a Gaussian distribution with as main characteristic that the standard deviation is about 16% of the mean breakdown value.(2) Closing in on short circuit leads to a temporary reduction of the breakdown voltage; a single interruption of the load current permits to restore the original breakdown strength.

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Section: Discussionmentioning

confidence: 99%

“…Therefore the testing procedure is important in the determination of the dielectric limit of a vacuum interrupter, which might explain the differences with respect to [7]. [7] No-load 9 -10 9 -12…”

Section: Discussionmentioning

confidence: 99%