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Aren't all industry CTs rated up to x20 secondary current before they start loosing accuracy? Going by this typical 5A secondary CT has current of 100A (5Ax20). So solution would be simple V=IR=100x1.1=110V. The fact that this CT is industry standard is kind of given by 8000A/400A=20 in the...

Hi, It's a problem with time dial setting on 50/51 relay. The problem states that a minimum pick up for 50/51 relay is 420A. Looking at the graph, curves originate at roughly 1.5 of pick-up setting. Shouldn't 1.5 (on x axis) correspond to 420 A, since that's where curves originate, hence lowest...