1. We have 5 Years Export Experiences 2. 100% full load burn-in test 3. Approved CE,ISO 9001 certificates 4. 2 years warranty Service conditionUse indoorTemperature range:-25°C-50°CRH(humieity:less than 85%)Altitude:lower than 2000mMounting Ambient:No harmless gas and steamed gas,no inductive and explosive dust,no viloent vibrationTechnical characteristicsRated Vlotage:230VAC, 250VAC, 400VAC, ...