1996
DOI: 10.1049/ip-smt:19960086
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Sparkover voltage of sphere gaps under standard lightning and switching impulse voltages

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Cited by 9 publications
(5 citation statements)
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“…This trend is also similar to the standard value where there is no significant difference U50% of positive from negative polarity for 10cm diameter sphere. This occurrence may be caused by the uniformity of filed across the gap of 10cm sphere, which shows that the voltage polarity has no effect on U50% [9,24]. From Figure 4-7 and 4-8, it shows that the influence of humidity on the value of U50%…”
Section: Breakdown Probability Curvesmentioning
confidence: 94%
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“…This trend is also similar to the standard value where there is no significant difference U50% of positive from negative polarity for 10cm diameter sphere. This occurrence may be caused by the uniformity of filed across the gap of 10cm sphere, which shows that the voltage polarity has no effect on U50% [9,24]. From Figure 4-7 and 4-8, it shows that the influence of humidity on the value of U50%…”
Section: Breakdown Probability Curvesmentioning
confidence: 94%
“…However, the author cannot find a numerical relation between voltage change and humidity. Gourgoulis, Mikropoulos and Stassinopoulos [9] conducted the experiment to study the influence of impulse shape, gap spacing and of humidity on U50% of 25 cm diameter spheres under standard lightning and switching impulse for both polarities. The authors simply stated that relationship between the U50% and the humidity displays four characteristic features:…”
Section: The Relationship Between Humidity and Breakdown Voltage Of S...mentioning
confidence: 99%
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“…Μη κανονική κατανομή πιθανότητας διάσπασης 2/1700 μs.Παρόμοιες ανωμαλίες έχουν παρατηρηθεί σε διάκενα με ανομοιογενή (διάκενα ράβδουπλάκας[43,53,54,60], διάκενα σφαίρας -ράβδου[61]) και σχεδόν ομοιογενή πεδία (σφαιρικά διάκενα[62]), όταν σε αυτά επιβάλλονται κρουστικές υψηλές τάσεις τόσο θετικής και αρνητικής πολικότητας. Τάση ΔιάσπασηςΣτην εικόνα 4.3 παρουσιάζεται για όλα τα επίπεδα υγρασίας οι μέσες τιμές των "U 50 " συναρτήσει της διάρκειας μετώπου της εφαρμοζόμενης κυματομορφής.…”
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