Style: sr, general purpose transformer for industrial control use. Primary volts: 240/480, secondary volts: 120, 50/60 hz, single phase, winding rise : 55 deg. C. Enclosure type: 3r outdoor, insulation system: x-3221-l class 155. Dimensions: 13.75" W. X 12.75" D. X 14.25" H.