SAF FS2-25-4 DC Drive Field Regulator

FS2-25-4 Field Regulator from SAF Drives is a high-current DC field regulator in the FS2/4 family, designed to deliver a controlled DC current to a DC motor field in standalone drive configurations or as part of a SAF/drive package. It accepts 480 V AC (three-phase) input and provides a DC field current rated up to 25 A, with a corresponding field voltage up to approximately 380 V DC; the input current rating is up to 35 A AC. The unit incorporates surge protection via MOVs and a heat-sink design to support continuous operation at the rated current, with FS2/4 documentation confirming 25 A DC output for the FS?-25-4 variant and 15 A DC for standard models in the same family. Typical applications include precise field current regulation for DC motors in industrial machinery, backup drive configurations, and situations where a standalone field regulator is employed with DC drives or controllers.