Measuring - electric network u12 417 v u23 U1 239V u2 Il 67 A 2 p +31 kW Q cos +0.87 f Voltage unbalance 1% Current unbalance 56 % M SN 418 V 22V 76 A -18 kVAr 50.13 Hz U3l 415V u3 240 V 13 33A S 42 kVA