Schneider Electric 7RL-500B Current Transformer

Schneider Electric's Square D 7RL-500B current transformer is a general‑purpose instrument transformer with a 50:5 ratio (50 A primary to 5 A secondary) designed for measurement and protection circuits in distribution equipment. It operates over a 50–400 Hz range and features insulation rated up to 600 V, making it suitable for both standard 50 Hz systems and higher‑frequency applications. At rated current it delivers 1% accuracy, with a DC resistance of 0.053 ohms, and weighs about 3.0 lb (1.4 kg). The device provides 2.5 VA at 60 Hz and 5.0 VA at higher frequencies, supporting reliable signal fidelity when feeding metering relays, protection relays, or panel instrumentation from a 50 A conductor.