Instrument Transformers Inc. 400:5 Current Transformer Y25645-008-06

The Instrument Transformers Inc. 400:5 Current Transformer, model Y25645-008-06, is a compact, toroidal current transformer designed for accurate measurement of AC currents in electrical systems. It features a 400:5 ratio, converting high primary currents up to 400A into a standardized 5A secondary output, making it ideal for integration with ammeters, watt-hour meters, and protective relays. This model operates at 600VAC with a 60Hz frequency and offers Class 0.6 accuracy, ensuring reliable performance in revenue metering and monitoring applications. Key advantages include its solid-core design for high accuracy and durability, ease of installation around existing conductors without disconnection, and robust insulation rated for 10kV BIL. It is suitable for industrial, commercial, and utility environments, such as power distribution panels, motor control centers, and energy management systems. Benefits include low burden operation, reducing errors in measurement chains, and a compact form factor that saves space. Drawbacks may include the need for careful burden matching to maintain accuracy and its non-split core design, which requires conductor threading during installation. Compared to similar products from competitors like ABB or GE, this ITI model offers superior thermal stability and cost-effectiveness for mid-range current sensing. Based on attached images, the unit appears used but in good condition with no visible damage, intact labeling, and a clean exterior. No parent/child assets are evident.