Square D 180R401 Current Transformer 400:5 Ratio

Square D by Schneider Electric 180R401 is a solid-core current transformer with a 400:5 ratio, engineered to convert up to 400 A of primary current into a 5 A secondary for measurement, metering, and protection devices. It features a 2.50-inch inner-diameter opening, a 600 V class insulation rating, and insulation capabilities up to 10 kV, enabling safe operation in higher-voltage environments. The unit covers a frequency range of 25–400 Hz, making it suitable for both traditional 50/60 Hz systems and select higher-frequency applications. With a 400 A primary rating and a 5 A secondary output, it aligns with common requirements for energy meters and protection relays in electrical panels and switchgear.