... single phase active energy measuring. Wall-mounted installation type, smart designDisplay type: LCD, unit is kWh, record accumulated total active energy. ... 100)AReference frequency:50Hz, 60HzStarting current: 0.004IbConnection type choice: single phase two wires, L, L, N, NL, ... N,N,L Impulse constant:1200imp/kWhStandard level:1.0class,2.0classPower consumption of meter ...