This part of IEC 60146, which is a Technical Report, gives guidance on variations to the specifications given in IEC 60146-1-1:2009 to enable the specification to be extended in a controlled form for special cases. Background information is also given on technical points, which facilitates the use of IEC 60146-1-1:2009.

This document primarily covers line commutated converters and is not in itself a specification, except as regards certain auxiliary components, in so far as existing standards may not provide the necessary data.

This document will not take precedence on any product specific standard according to the concept shown in IEC Guide 108. IEC Guide 108 provides the information on the relationship between horizontal standards and product publications.Cross References:IEC 61378-1:2011IEC 60269-1:2006IEC 60269-4:2009IEC 60146-1-1:2009IEC 60529IEC 60050-551-20IEC 60664-1IEC 61148IEC/IEEE 60076-57-129IEC 60050-551IEC 61378 (all parts)IEC 60146-2IEC 62040-3IEC 60364-1IEC 60050-521IEC 62477-1 IEC 61800-1IEC 60146 (all parts)IEC 60747-1IEC 60747-6:2016 IEC TR 60269-5:2014IEC Guide 108:2006IEC 61378-3:2015IEC 60747-2:2016