Electrical Engineering

Why you used different Current Transformer ratios?

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Wiki User
05/07/2008

The selection of CT Sizing is based on total connected load. If for example a Main CB of 2000 KVA Trafo is 4000 A -- then best selection would be 4000:5 -- this would match also in the Energy Meter (KWH Meter) with 800 as multiplier.