... phase between current, phase between voltage¤t, frequency, phase, active power, reactive power, apparent power, power factor, vector sum when ... metrology department, etc, especially applies to power quantity measurement system and relay protection system. II. Features & Functions1. Equipped with shock-proof, skid ... .5%rdg+3dgt)phase0.0°~360°0.1°±1°Active power0.0W~12kW0.1W±(3%rdg+3dgt)Reactive power0. ...