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how to know the sign of accumulated energy in AWATTHR,BWATTHR,CWATTHR registers

Question asked by luck on Apr 6, 2016
Latest reply on Jun 30, 2016 by cammo

i) How to check accumulated energy in AWATTHR,BWATTHR & CWATTHR is positive or negative

ii) For example, for phase A the accumulated active energy may be positive or negative in AWATTHR register,

for example energy is acculated in AWATTHR for duration of two hours,

During first hour the current flows in the CT in one direction in phase A,during next hour the direction of current flow in CT is reversed in phase A deliberately,but the magnitude of current was same only direction was reversed betwen first and second hour,

Now what will be the accumulated energy in the AWATTHR register,

will it show zero value?