Hammond's 1000VA open style control transformer is rated 240X480 - 120X240 primary/secondary voltage. Ideal for general purpose, industrial and light duty loads. Add this control transformer to your cart at HomElectrical.com today! Rating: 1000VA. Primary Voltage: 240X480. Secondary Voltage: 120X240. Copper wound coils with high dielectric strength insulation. Well suited for HVAC applications, signal and alarm systems, motor control circuits, lighting and circuit isolation.