15 KVA, 1-Phase, 240 x 480 Primary Volts - 120/240 Secondary Volts, NEMA 3R, Shielded Isolation Transformer, Encapsulated, 60 Hz. HxWxD: 16.94" x 14.12" x 11.59". ***Reverse Feed Capable and for Use with 3-Phase Source by Connecting Primary to Any Two Wires of a 3-Phase System***