Good quality 300 Amp Circuit Breaker - DAB6 MCB – DaDa

Normal operating conditions and installation conditions

Ambient air temperature: -5℃~40℃, and average temperature in 24h below +35℃.
Altitude of the installation site should not exceed 2000m.
Atmospheric relative humidity at ambient air temperature is + 40℃ for not more than 50%, in the low temperature can have higher relative humidity. For example, in +20℃ , the relative humidity can reach 90%.
It should be noted that, due to temperature changes, for appropriate condensation produced occasionally, appropriate measures should be taken (such as drainage holes).
The installation adopts vertical installation. The inclination of the mounting plane to the vertical plane should not exceed ± 5 °
The place without significant shake and shock vibration.
If installed in a closed protective case, and more than one are installed closely, which should be used after the derating, derating factor optional 0.7 ~ 0.8, use high-value for metal protective case, for plastic protective case, you can use low value .