Operating conditions of molded case circuit breakers

Ambient Air Temperature:

• Maximum ambient air temperature: +40℃;
• Minimum ambient air temperature: -5℃;
• 24-hour average ambient air temperature: not exceeding +35℃.

Altitude: The altitude of the installation site shall not exceed 2000m.

Atmospheric Conditions: Relative humidity shall not exceed 50% at an ambient air temperature of +40℃; higher relative humidity is permissible at lower temperatures; the maximum average relative humidity for the wettest month is 90%, with a minimum average temperature of +25℃ for that month, taking into account condensation on the product surface due to temperature changes.

Pollution Level: Pollution level 3.