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How is the Accuracy Class rating of the CT calculated?

The accuracy class rating of the CT is based on Max Power (VA) for the CTs.  As per the Schneider Catalog the CT's have 3 different Class, class 0.5, class 1 and class 3.

If the meter (VA) + the cable (VA) is less that Class 0.5 Max VA of the CT, the CT is class 0.5.

See attached example for reference. 

 
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