Sola DT661H118S - SolaHD Drive Isolation Transformers, ranging from 7.5 to 440 kVA in three-phase configurations at 60 Hz, are specially designed for SCR variable speed motor drive applications. They provide both magnetic isolation from the incoming line and voltage adjustment to match SCR Drive requirements, typically using a delta primary and wye secondary design. These transformers are robust, handling mechanical stresses, voltage demands, and harmonics common in SCR applications, effectively reducing load disturbances. They feature UL Listed/NEMA Type 3R enclosures (with optional weather shield), voltage adjustment taps, full secondary neutral capacity per the National Electric Code, noise-reducing shielding, and come with a 10-year limited warranty. Certified to UL 506, CSA C22.2 No. 66, and UL 1561 standards, they are complemented by Surge Protective Devices and K-13 Rated Transformers for Variable Frequency Drives, with Weather Shields available as accessories.