... power power factor,frequency,watthour,reactive power etc D2011 single-phase multifunctional energy meter YOTO hot sellMain introduction:Technical ... parameters Power AC220V±10% 50/60HzMeasuring itemTRMS,single-phase,voltage,current,power,power factor,frequency,watthour,reactive power ... 3~300V,4~600V Current:0~2A,0~20AAlarming Relay:NO contactor 250VAC 3A OR 30VDC 3A COS¢=1Show ...