Schneider Electric 74RFT-401 Current Transformer

The Schneider Electric Square D 74RFT-401 current transformer is a 600 V-class indoor current transformer with a 400:5 ratio, part of the 74RFT toroidal family and rated for operation from 25 to 400 Hz. It features a 2.50-inch window diameter, a weight of approximately 2.7 lb (1.2 kg), and a DC resistance of 0.0823 ohms at 25°C, suitable for measuring up to 400 A primary with a 5 A secondary. The device provides ANSI metering accuracy at 60 Hz of 0.3%, making it suitable for precise metering and integration with protection relays in switchgear and distribution panels. As a compact, indoor installation transformer, the 74RFT-401 aligns with Schneider Electric's Square D line of current transformers and complements other models in the 74RFT series for scalable current measurement in industrial and commercial power systems.