Units are enclosed in a NEMA 2 drip proof painted metal enclosure with natural draft ventilation. The core and coil assembly is mounted on rubber isolation pads to reduce noise. Weathershield kits are available for conversion to a NEMA 3R enclosure suitable for outdoor service. NEMA 2 and NEMA 3R stainless steel (Type 316) enclosures are available up to 150 kVA. To specify a stainless steel enclosure for an aluminum wound transformer, substitute the letter "S" in the fifth character of the GE product number. For example, 9T10A1004 changes to 9T10S1004. For copper-wound transformers, substitute the letter "Z" in the fifth character of the GE product number. For example, 9T10C1004 changes to 9T10Z1004. All QL model product numbers begin with 9T7, 9T8, or 9T1. Transformer taps compensate for high or low line voltages. Most standard QL units rated 15 kVA through 300 kVA and with a primary voltage of 240 VAC or higher have six available voltage taps - four 2.5% taps below the nominal tap and two 2.5% taps above the nominal tap. This arrangement provides a 15% range of tap voltage adjustment. Transformers rated 500 kVA and higher have four available voltage taps two 2.5% taps above the nominal tap and two 2.5% taps below the nominal tap.
GE General Purpose Transformer, Type QL Dry Type Vented, 480 VAC Primary, 208Y/120 VAC Secondary, 45 kVA Power, 60 Hz Frequency, 3 ph, 6 Taps, Lug/Bolt Down Terminal Connection, Y373A Frame Circuit, Floor Mounting, IS-19C Insulation, NEMA 2 Enclosure, 40 deg C, Metal Housing Material, 32-1/2 in H x 23-1/2 in W x 18-1/2 in D Dimensions