Ambient air temperature 5 ℃ -40 ℃, and 24h average no more than +35 ℃ (except special order); the installation site altitude does not exceed 200m; installation location of the air relative humidity does not exceed +40 ℃, 50% ; at a lower temperature allows a higher relative humidity, such as 20 ℃, 90% humidity for Occasionally, due to be produced by condensation to take special measures; pollution degree 3; main circuit breaker and undervoltage release coil, power transformer primary coil is installed category IV, the remaining auxiliary circuit, control circuit installation category Ⅲ; installation instructions should require the installation of circuit breaker, breaker of the vertical gradient of not more than 5; breaker installed in the cabinet small room, protection class of IP40; installation of door frames, protection class of IP54.
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