SCM1

Normaloperating conditions

The altitude ofthe installation site shall not exceed 2000 meters
The ambient air temperature shall not exceed+40℃,and the average temperature within 24 hours shall not exceed +35℃
The lower limit of the ambient air temperature is 5 degrees.

When the maximum temperature is+40℃,the relative humidity of the air shall not exceed 50%.Higher relative humidity can be allowed at lower temperatures, such as 90% at 20℃.Special measures shall be taken for occasional condensation on products due to temperature changes.

The pollution level is 3
The installation category of the main circuit ofthe circuit breaker isl,and the installation category of the auxiliary circuit and control circuit not connected to the main circuit is Il
Use category A or B