3.1Temperature: -5°C -+40°C; the average value within 24h shall not exceed + 35 °C. (please refer to coefficients on P39 for temperature compensation correction); for the circuit breaker with thermo-magnetic release, +40°C is set to be the standard temperature for ratings. For temperature not between -5°C -+40°C, please contact us for temperature compensation correction.
3.2Altitude: not exceed 2000m (Please contact with us for reduction coefficient if altitude at the mounted site beyond 2000m).
3.3Pollution grade: III;
3.4Air conditions
At mounting site, relative humidity not exceed 50% at the max temperature of +40°C , higher relative humidity is allowable under lower temperature. For example, RH could be 90% at +20°C, special measures should be taken to occurrence of dews.