Effect of Different Dielectric Coatings in Divergent Fields

Stangherlin, Silvio; Rein, Christian; Salge, G.; Koenig, Friedrich

doi:10.1007/978-1-4419-8979-6_46

Cited by 4 publications

(2 citation statements)

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“…In a covered plane-parallel electrode system under dc and lightning impulses the increased dielectric strength of the gap was attributed to charge formation at the electrode surfaces as well as in the air gap [4]. An increased dielectric strength due to dielectric covers has also been observed in rod-plane configurations [5][6][7][8][9][10][11], where the apparent non-uniformity of the electric field approximates better the enhanced localized field values commonly found in insulation systems. However, this behavior depends on the electric field distribution in the gap as modified by space and surface charges associated with prebreakdown phenomena.…”

Section: Introductionmentioning

confidence: 95%

“…However, this behavior depends on the electric field distribution in the gap as modified by space and surface charges associated with prebreakdown phenomena. Thus, the dielectric behavior of a rod-plane gap with a covered rod would depend on the combined effect of several parameters such as the polarity of the applied voltage [5][6][7][8][9], gap length [5], [8], [10], [11], rod geometry [5], [8], cover material and geometry [5][6], [8][9][10] and air pressure [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impulse breakdown of short rod-plane air gaps with a dielectric covered rod

Mavroidis

Mikropoulos

Stassinopoulos

et al. 2008

2008 43rd International Universities Power Engineering Conference

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Results are presented concerning breakdown of short rod-plane air gaps with a dielectric-covered rod under positive standard lightning and switching impulse voltages. Breakdown probability distributions were obtained through multiple level tests and the time and voltage to breakdown were measured with the gap length as a parameter. The simple air gaps with a bare rod were considered as reference cases. There is an increase in the dielectric strength of the gap due to the insulating cover, especially under switching impulse voltages. In the presence of the dielectric cover the effect of the impulse waveform on the dielectric strength of the gap is minimal.

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