Resistor ZX2 series, open type,is applicable for start,timing,braking,discharge indistribution system. Resistor ZX2 series, open type,is applicable for start,timing,braking,discharge indistribution system of AC 50HZ,rated voltage AC up to 660V,rated voltage DC upto 440V.Altitude does not more than 2500mm.The ambient temperature from +40°C to -25°C, average temperature should be lower than 35°C ...