... the laboratory1) U max: 450V2) I max in direct connection: 20A3) Connection with current clamps: standard ... 4.5V to 5.75V5) Accuracy in direct connection: a) Active energy: typical: 0,1%, worst case: ... voltage, phase current, phase and three-phase active power, phase and three-phase reactive power, ... function is the serial number, the meter type (active or reactive), the constant, the divisor factor ...