3-phase Universal Digital Panel Meter LED display volt, current, power, frequency, power factor, kWh, DI/ ... DO RS485, Modbus PMAC600B 3-phase Digital Panel Meter ØSuit for 220V, or 240V (ph-N) low voltage system ... : 80V ~ 300VInsulation Strength2KV(testing voltage is AC valid value)Insulation Resistance≥ 50MΩMTBF≥ 50000hOperating EnvironmentOperating Temperature:-20°C~+60°CStorage Temperature ...