Low Voltage Dry Type, Encapsulated, Enclosed. QB and QMS transformers feature encapsulated core and coils in a NEMA 3R nonventilated weatherproof enclosure. Single Phase or combine to create three-phase autotransformers, ranging from 0.05 kVA to 3 kVA; Primary voltages: 120, 240 or 480 V. Secondary voltages: 12, 16, 24, 32, or 48