IEC 60721-2-2:2024 presents fundamental properties, quantities for characterization, and a classification of environmental conditions dependent on precipitation and wind relevant to electrotechnical products.This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:a) the layout of the information provided has been re-organized;b) the information provided has been extensively enhanced and revised;c) new information on wind severities has been included.
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.
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