The Square D™ by Schneider Electric Type EO Industrial Control Transformers are designed with exceptional voltage regulation and low temperature rise. This transformer is a single phase 150VA transformer designed for 240x480VAC primary with a 120VAC secondary. (The unit also supports 230x460VAC to 115VAC and 220x440VAC to 110VAC.) This transformer has primary voltage of 230 x 460 V and secondary voltages of 110 V.