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IEC 60897 Ed. 1.0 b:1987
Methods for the determination of the lightning breakdown voltage of insulating liquids
Describes two test methods, A and B, for assessing the electric strength of insulating liquids in a divergent field when subjected to standard lightning impulses. Method A is based on a step procedure intended to provide an estimate of impulse breakdown voltage under specific conditions. Method B is a statistical test designed to check a hypothesis about the impulse breakdown probability of an insulating liquid at a given voltage level.
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International Electrotechnical Commission [iec]
