Working environment conditions:

1.1 Ambient temperature

1.1.1 Normal working temperature is -5°C- +30°C, working temperature limit is -40°C – +70°C.

1.1.2 Derate according to the sample requirements when the temperature is <-5°C or > +30°C (see Table 11 for details).

1.2 Installation category

1.2.1 It is category-III for the main circuit and category- II for remaining auxiliary circuits.

1.3 Pollution class: 3

1.4 Altitude: 2,000 m, derating according to the sample requirements when above 2,000 m (see Table 10 for details).

1.5 Atmospheric conditions

1.5.1 The relative humidity is not more than 50% when the ambient temperature is +40°C;

1.5.2 A higher relative humidity is allowed at the lower temperature.

For example, the relative humidity may be 90% at +20°C. Special measures shall be taken for condensation due to temperature changes.

1.6 Shock and vibration

1.6.1 Withstand mechanical vibration with the frequency of 2Hz-13.2Hz, displacement of ±1mm and mechanical vibration with the frequency of 13.2Hz-100Hz and accelerated velocity of ±0.7g