FeaturesQuite operation with sound levels below NEMA standardsElectrostatic shield for enhanced protectionEncapsulated core and coilShielded for cleaner powerEncapsulated and completely enclosed design electrical grade silica and resin compounds completely enclose the core and coil to seal out all moisture and airUL type 3R enclosure for indoor or outdoor service, encapsulation eliminates corrosion and insulation deteriorationAir cooled/dry coolingFour windingsAluminum, two primary winding, two winding secondary