THIS IS A HAMMOND POWER SOLUTIONS DM051KK DRIVE ISOLATION TRANSFORMER, IDENTIFIED AS A GENERAL PURPOSE TYPE WITH A 51KVA RATING. IT IS A 3-PHASE UNIT FEATURING AN ALUMINUM WINDING MATERIAL. THE TRANSFORMER OPERATES WITH A PRIMARY VOLTAGE OF 480 DELTA (480D) AND A SECONDARY VOLTAGE OF 480Y/277V. THE ENCLOSURE IS RATED NEMA 3R, AND THE UNIT TYPE IS K. PHYSICAL DIMENSIONS ARE 23.9 INCHES IN WIDTH, 25 INCHES IN DEPTH, AND 28.75 INCHES IN HEIGHT. THE CASE STYLE IS NH6, AND THE WIRING DIAGRAM IS SCD 7.