Industrial RL-500 Instrument Current Transformer

The 5RL-500 current transformer from TE Connectivity’s Crompton Instruments division is a solid-core, indoor, single-phase instrument transformer with a 50:5 A ratio designed for metering and protection circuits. It converts a 50 A primary into a 5 A secondary, features a 1.56-inch (40 mm) through-conductor window, plain ring mounting, and wire-lead termination suitable for panel wiring. Rated for 50–400 Hz operation and insulation to 600 V with a 10 kV basic impulse level, this CT is intended for accurate current sensing in low- to medium-voltage distribution, energy metering, and protection relays. Weighing about 1 lb, the 5RL-500 is a through-conductor transformer commonly used in industrial environments where current measurement is required.