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Current transformers (CTs) are essential devices in electrical systems, designed to measure alternating current (AC) by transforming high primary currents into lower, manageable secondary currents for safe monitoring and control. They are widely used in power distribution, energy metering, and protection systems. Key features include high accuracy, isolation between primary and secondary circuits, and robust construction for reliable performance in harsh environments. Common products in this category include split-core CTs for easy installation, solid-core CTs for permanent setups, and Rogowski coils for flexible current measurement. These devices are critical for ensuring electrical safety, optimizing energy usage, and maintaining system efficiency in industrial and automation applications.