Schneider Electric 7RL-101B Current Transformer

Schneider Electric's Square D 7RL-101B Current Transformer is a general‑purpose rectangular CT designed for precision metering and protection in AC power systems. It provides a 100:5 ratio (primary 100 A, secondary 5 A), enabling reliable signal scaling for protective relays and power meters, while supporting up to a 600 V insulation class for typical industrial and commercial circuits. Rated for 50–400 Hz, the 7RL-101B is suited to both utility and process environments where accurate current sensing is essential across a wide frequency range. Encased in a NEMA 1 indoor enclosure, this unit is intended for dry, indoor installations and can be integrated with Square D protection and metering hardware as part of a broader power monitoring and control scheme. The model is part of Schneider Electric’s instrument transformer family, specifically designed for single‑phase applications, and is commonly used to monitor feeders, panels, and switchgear where precise current measurement is required for billing, energy management, and relay coordination.