SPECIFICATION:Used for AC single phase active energy measuring. DIN rail installation type, compact design. Display type: ... to IEC62053-11 standardAccording to IEC62053-21 standardFUNCTIONS:Total energy= positive active+negative active Display data after power off ... single phase two wires, up in down out, L, L, N, NImpulse constant:1600imp/kWhStandard level:1.0class,2.0classPower consumption of meter ...