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This standard applies to line-commutated semiconductor power converters for general purpose industrial direct current motor drives powered from three-phase or single-phase ac supplies. Reference is also made to a companion standard: IEEE Std 444-1973, which is usually intended for larger drives requiring multi-phase power, normally used in more complex system applications.


New IEEE Standard - Inactive-Withdrawn. Line-commutated semiconductor power converters for general-purpose industrial dc motor drives powered from three-phase or single-phase ac supplies are considered. The objectives are to provide a common vocabulary, common methods of test and specification, and a recommended code of practice. Service conditions, operating characteristics, circuits, ratings, and regulators are covered.