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Insulation coordination is essential for designing and testing HV cable systems properly. In transient conditions, i.e., in the presence of transient voltage surges, insulation coordination is based on the individuation of a certain maximum acceptable risk of failure under the switching and lightning overvoltages that the insulation may encounter in service, and translates into a maximum number of...
In this paper the combined electro-thermal life model for the insulation of power cables is extended in order to include the volume enlargement law, whereby the statistical breakdown behavior with the increase of insulation volume is accounted for. In this way, a new comprehensive model is obtained, whose usefulness lies in that it includes the effect of volume enlargement - beside that of electrical...
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