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What is the cause of getting a negative reading for the active power (W) in powerlogic PM1000 ?

CT may be reversed and in this case Check and correct the CT connections.

 

Power may be in export mode and in this case 

 

1.     Check the mode. If the mode is in import, s1 s2 need to be interchanged in one or two or in all the three phases. Under this condition, the energy will update in INTG Rev.

2.     Check the mode. If it is in export, then the energy will update in INTG Rev.

 

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