... Digital Panel Meter LED display volt, current, power, frequency, power factor, kWh, DI/ DO RS485, Modbus PMAC600B 3-phase Digital Panel Meter ... Ø10 years back-up of integrated energy dataØLED display, high brightness, auto-scrollingØCT primary ... 300VInsulation Strength2KV(testing voltage is AC valid value)Insulation Resistance≥ 50MΩMTBF≥ 50000hOperating EnvironmentOperating Temperature:-20°C~+60° ...