480 Delta Primary Volts - 208Y120 Secondary VoltsExceeds US DOE CSL-3 efficiency to help you reduce electrical waste and provide sustainability in your electrical designSignificantly exceeds TP1 efficiency for low operating cost over the life of the transformerOptimized design provides maximum reliability and proven performanceProduced in an ISO 9001 facility to ensure high quality and rigorous testing standards480 Delta Primary Volts; 208Y120 Secondary Volts; May be used on a 4 wire 480Y/277 Volt Supply; 3Ø, 60 Hz.Out of Package Height (in)41.520Out of Package Width (in)32.900Out of Package Length/Depth (in)29.870Out of Package Weight (lbs)1260.000Weight - Imperial (Part)1260 lbWeight - Metric (Part)571.5 kgImperial Height Dimension (inches)41.52 inImperial Width Dimension (inches)32.9 inImperial Depth (aka Length) Dimension (inches)29.87 inMetric Height (mm)105.5 cmMetric Width (mm)83.6 cmMetric Depth (mm)75.9 cm