IEC 60938-1:1999, applies to inductors designed for electromagnetic interference suppression intended for use within, or associated with, electronic or electrical equipment and machines. It is restricted to inductors for which safety tests are appropriate. This second edition cancels and replaces the first edition published in 1988 and constitutes a minor revision related to tables, figures and references. It also includes Amendment 1 (2006).
Applicable to inductors for radio interference suppression intended for apparatus and machines to be connected to a supply with a nominal voltage not exceeding 500 V between conductors or 250 V between any one conductor and earth and a frequency not exceeding 100 Hz. The combination of two or more inductors within one enclosure is also included in the scope of this standard.
IEC 60938-1:2021 applies to inductors designed for electromagnetic interference suppression intended for use within all kind of electric and electronic equipment. In this generic specification, normative references and terms and definitions are given. It also prescribes general requirements and the suitable test and measurement procedures for interference suppression inductors. Annex B states special requirements for earth inductors. This edition includes the following significant technical changes with respect to the previous edition: a) material tests added; b) improved readability and clear separation between test descriptions in the generic spec and requirements in the sectional specification; c) creepage and clearance requirements are now defined in sectional specifications only; d) AC testing for voltage test included.
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