IEC 60721-2-2 Ed. 2.0 b:2012

Classification of environmental conditions - Part 2-2: Environmental conditions appearing in nature - Precipitation and wind

IEC 60721-2-2:2012 presents fundamental properties, quantities for characterization, and a classification of environmental conditions dependent on precipitation and wind relevant for electrotechnical products. This second edition cancels and replaces the first edition, published in 1988, and constitutes a technical revision. The main changes with regard to the previous edition are as follows:
 - subclause Precipitation: simplified;
 - data not possible to validate are removed;
 - subclause Wind: text rewritten;
 - Table 1 simplified and aligned with definition used by [1];
 - subclause Hail: data added;
 - formula changed;
 - formula for impact energy added;
 - subclause Snow: text changed and aligned with definitions used by [1];
 - Table 3 removed;
 - subclause Normal rain: text has been modified and numeric values removed;
 - subclause Driving rain: text has been modified and numeric values removed;
 - subclause Formation of ice: text has been modified and numeric values removed;
 - subclause Drifting snow: text added;
 - subclause Wind force: formula changed;
 - Figure 1 to 5 removed.