Abstract
This paper deals with the influence of bubbles in insulating liquids and their role in liquid breakdown. Bubbles play a deleterious role in the dielectric strength of insulating liquids. Depending on their shape and localized electric field, bubbles may significantly lower the dielectric strength of insulating liquids. The present paper offers a short review – albeit incomplete – on the role of bubbles and tries to elucidate their relation to the total breakdown of dielectric liquids. It also proposes some further fields of research.
Highlights
Insulating liquids are widely used in high voltage equipment to fill a space needed to be insulated and since they can be circulated they can be used to dissipate any heat generated in the system
A special subject of interest when working with insulating liquids is the subject of bubbles, the presence of which may vastly increase the probability of breakdown
Needless to say that the present review is incomplete in terms of investigating the numerous factors affecting the dielectric strength of insulating liquids, as it is only focused in the effect of bubbles
Summary
Insulating liquids are widely used in high voltage equipment to fill a space needed to be insulated and since they can be circulated they can be used to dissipate any heat generated in the system. They exhibit, in general, a satisfactory dielectric strength [1]. A special subject of interest when working with insulating liquids is the subject of bubbles, the presence of which may vastly increase the probability of breakdown. Needless to say that the present review is incomplete in terms of investigating the numerous factors affecting the dielectric strength of insulating liquids, as it is only focused in the effect of bubbles
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