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Short-Circuit & Per-Unit Studies

Available Fault Current vs. Interrupting Rating: 65 kA and 100 kA Switchgear

A comparison of 63.1 kA available fault current against 65 kA existing switchgear (a 3.0% margin) and 100 kA replacement switchgear (58.5%), with the utility, generator and motor contributions and a note that interrupting duty and short-time withstand are separate ratings.

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