EIL Instruments Ltd 5RL-201 Current Transformer

The 5RL-201 from EIL Instruments Ltd is a current transformer with a 200:5 primary-to-secondary ratio, designed to convert higher line currents to a 5 A secondary suitable for meters and protection relays. With a 200 A primary producing 5 A on the secondary, the device provides a 40:1 current reduction for safe, accurate sensing in electrical installations and control circuits. Current transformers like the 5RL-201 are used to monitor load currents, feed data to energy meters, and supply input signals to protective relays while isolating measurement equipment from the live circuit. This model adheres to standard instrument transformer principles, offering the essential ratio specification that enables safe interfacing with conventional 5 A secondary instrumentation. Applications typically include electrical distribution panels and switchgear where bulk currents must be represented at a manageable secondary level for monitoring and protection systems. Key facts: Manufacturer — EIL Instruments Ltd; Model — 5RL-201; Type — Current Transformer; Ratio — 200:5.