This part of IEC 61000 relates to the immunity requirements, test methods, and range of
recommended test levels for equipment to unidirectional surges caused by overvoltages from
switching and lightning transients. Several test levels are defined which relate to different
environment and installation conditions. These requirements are developed for and are
applicable to electrical and electronic equipment.
The object of this standard is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to surges. The test method decumented in this part of 61000 describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon.

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