BS EN 61000-4-5:2014+A1:2017 relates to the immunity requirements, test methods, and range of recommended test levels for equipment with regard 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 documented in this part of IEC 61000 describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon.Cross References:IEC 60050HD 60364-4-444IEC 60664-1IEC 61643-21:2000A2:2012ITU-T K.44EN 62305-1IEC 61643TS 61643-12EN 60664-1IEC 60364-4-44A2:2013IEEE Std 4-1995TS 61643A1:2009IEC 60060-2A1:2008HD 60364-4-442EN 61643EN 61643-11EN 60060-2IEC 61643-11EN 61643-21:2000IEC 62305-1IEC 61000-4-4IEEE Std C62.45-2002TR 61000-1-6:2012EN 61000-4-4IEC 61643-12Replaces BS EN 61000-4-5:2014 which remains currentIncorporates the following:Amendment, February 2018