What is a current transformer?

A current transformer is a type of instrument transformer that is used to step down high currents to a lower, more manageable level for use in measuring and protection systems. It works on the principle of electromagnetic induction, where the primary current flowing through the conductor generates a magnetic field that induces a proportional current in the secondary winding.

Current transformers are typically used in conjunction with ammeters, wattmeters, or other measuring devices to monitor and measure electrical currents in various industrial and commercial applications. They are also commonly used in protection systems to detect overcurrent or fault conditions and to isolate the faulty portion of the system.

Current transformers come in a variety of sizes and configurations to suit different applications and current ranges. They are designed to be accurate, reliable, and safe to use in high-voltage environments. Proper installation and maintenance are essential to ensure the correct operation of current transformers and the accuracy of the measurements they provide.