Why? Please more explain 1-Why?, is it dependent to load power factor ( leading or lagging)? 2- Why?, is it dependent to load power factor ( leading or lagging)? 3- N1.I1+N2.I2 = (N1 or N2). Imag >0 , N1 or N2 which one? 4- Is the direction of active power flow important or reactive power flow?