ABB 9T51B0509 - ABB's General Purpose Transformers in Enclosures offer dependable and quiet transformer operation for a range of applications. These dry-type transformers, up to 1,000 kVA, are UL listed per Standard 506 and 1561, meeting the requirements of NEMA ST-20, 1992. Models Type QB, QMS, and QMS 3 are also C-UL listed. Designed for general-purpose use, they are rated up to 600 Volts, making them suitable for appliance, lighting, and power loads from electrical distribution systems. Standard distribution voltages include 600, 480, and 240 Volts, while load voltages range from 480 to 120 Volts. These transformers eliminate the need for costly low-voltage feeders by providing the correct voltage right at the load, all without requiring vaults for installation. Construction for Types QB, QMS, and QMS 3 involves NEMA 3R nonventilated weatherproof enclosures, with encapsulated core and coils for added durability.