... 1.General:DTS480 type is the 3 phase 4 wires meter which can meas the rated frequency (50HZ) electric energy ... . The meter is for indoor use,and the temperature should be -10°C to +50°C;relative ... will make some mistake of the meter\ DTS480 3(6)A,5(20)A,10(40)A,15(60)A, ... ,the meter's runing should not be more than 1 circle3.more pic: Three phase electronic type Power Meter with LCD ...