... is moisture-resistant, fire-retardant, high temperature overall.2.2 Way of connection: direct connection, through CT, ... 110,120, 220, 230, 240 1.0S, 2.0S50, 60Starting currentOperating temperature range(°C)Relative humidityVoltage circuitCurrent ... GuaranteeWe are professional energy meter manufacturer. We certify that the meter gurantee period is 18 months. DDS854 single phase electric energy meter