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What are the Main and Branch CTs excitation points of the Branch Circuit Power Meter Split Core (BCPMSC)  

Excitation point of the mains CTs are 0.25A.
Excitation point of the branch CTs are 10% of the rated value.
CTs shipped with the meter are labeled as 60A CTs, however they are specified to function within 1% accuracy up to 50A.
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