... . 1.General:DTS480 type is the 3 phase 4 wires meter which can meas the rated frequency (50HZ) electric energy. ... the same time,pls confirm there is no etchant gas,fog and few.etc.all these bad condition may ... .0,if the current will be 0.5%,,the meter will run continuously from left-right.c.creepingWhen there ... will be 80%-100% of the rated volt,the meter's runing should not be more than 1 circle3.more ...