frs Posted June 9, 2007 Report Share Posted June 9, 2007 Typically, сircuit breakers are offered in 2 or 3 short-circuit breaking capacity ratings. For example, 40kA, 70kA and 100kA at 400V What design features makes them different? Is it bigger/smaller contacts or stronger/weaker springs or something else?.. Link to comment Share on other sites More sharing options...
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