What does the abbreviation "CT" represent in electrical terminology?

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The abbreviation "CT" in electrical terminology stands for Current Transformer. Current transformers are essential devices used in electrical systems to measure alternating current (AC). They function by creating a secondary current that is proportional to the primary current, allowing for the safe measurement of high currents without the need for direct contact. This enables the use of standard metering equipment and safety measures in monitoring electrical systems.

Current transformers play a crucial role in protective relaying and metering applications, providing a means to accurately gauge current levels while ensuring that the high voltage from the electrical power system does not pose a safety risk. Their design typically involves a toroidal core through which a conductor passes, enabling the transformation of current based on the turns ratio.

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