Current transformers serve which function in electrical systems?

Current transformers are crucial components in electrical systems, primarily designed to reduce current levels for the purpose of measurement and protection. They function by stepping down high currents to a lower, more manageable level that can be safely measured by instruments. This capability allows for accurate monitoring and control of electrical systems without the need for direct handling of high current values, which can be dangerous.

By reducing the current, current transformers make it possible for standard measurement equipment to effectively assess electrical parameters, ensuring reliable operation and enhancing the safety of both personnel and equipment. Furthermore, this transformation plays a significant role in protective relay systems, where the measured current values can initiate protective actions if abnormal conditions (like overloads or faults) are detected.

In summary, reducing current levels is essential for safe operation and effective monitoring of electrical systems, which is the primary function of current transformers.