1. The upper limit of the ambient air temperature shall not exceed +40°C, and the lower limit shall not be lower than -5°C; furthermore, the average value over a 24-hour period shall not exceed +35°C.
2. The installation site shall be located at an altitude not exceeding 2000 meters.
3. The atmospheric relative humidity shall not exceed 50% at an ambient air temperature of +40°C. Higher relative humidity is permissible at lower temperatures; specifically, the monthly average maximum relative humidity of the wettest month shall be 90%, provided that the monthly average minimum temperature for that same month is +25°C, and taking into account the condensation that may occur on the product surface due to temperature fluctuations.
4. Pollution Degree: 3
5. Installation Conditions: The device may be installed either vertically or horizontally.
6. Installation Category: The main circuit of the circuit breaker, the undervoltage release circuit, and the primary winding of the power transformer fall under Installation Category IV; all other auxiliary circuits and control circuits fall under Installation Category III.
