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The barrier effect is well known to increase the breakdown voltage of air gap. While, previous research has suggested that the occurrence of secondary discharge at the underside of barrier accompanied by the development of upper surface corona discharge on the barrier contributes to the reduction of the barrier effect. The properties of the underside discharge are, however, still not well understood...
In general, printed circuit boards (PCBs) used in power devices and system operation in low pressure environments are more susceptible to damage from surface discharges. Additionally, repetitive operation of power systems is an important factor leading to tracking failure. Whether the tracking phenomenon at low pressures is different from that at atmospheric pressure needs better understanding to...
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