... . 8) Reliability:MTBF≥500h, confidence level:r more than 0.90;9) Maintenance: modular design, easy for maintenance,MTTR≤30min.10 ... environment: operating temperature:-20°C~+50°C, operating humidity:10%~90%(+30°C)11) Storage temperature:-40°C~+60°C, storage humidity ... :≤95%(+30°C)12) Power supply:three phase, four cable, AC380V, frequency ...