The Grainger 170NF3 is a 3-phase, 60 Hz, 460 VAC, 170 kVA, oil-filled transformer. It features a 220/127 VAC secondary voltage and is designed for both indoor and outdoor applications. This general purpose transformer has a weather resistant, rust inhibiting finish and includes lightning arresters for surge protection. With a weight of 2,450 lbs, dimensions of 48" H x 40" W x 54" D, and a 1.15% impedance, this transformer is suitable for a variety of commercial and industrial applications.