ABB 2SFT-201 Current Transformer

The 2SFT-201 current transformer is a solid‑core, window‑type instrument transformer intended for indoor metering and current monitoring in electrical panels. It delivers a 200:5 A secondary with a 4 VA burden and 600 V insulation (10 kV BIL full‑wave). The device uses a 1.13 in (28.7 mm) window opening to encircle a single conductor and features a square outer housing with integrated mounting feet for secure installation. It supports 50–400 Hz operation, making it compatible with both 50 Hz and 60 Hz systems, and is commonly specified with about 1% accuracy (class 1) at the rated current for precise measurement up to 200 A primary. This combination of compact size, fast response, and metering‑grade accuracy makes it suitable for distribution panels, metering cabinets, and relay circuits where reliable current sensing is essential.