What is the main purpose of the primary winding in a wire wound voltage transformer?

The primary winding in a wire wound voltage transformer is designed to connect to the phase voltage. Its main purpose is to take the high voltage from the power system and step it down to a lower voltage suitable for measurement and control applications without directly connecting to the high voltage system. By connecting to the phase voltage, the primary winding captures the electrical signals in the system and converts them to a lower, more manageable level that can then be used for various applications, such as instrumentation, protective relays, or metering.

This function is critical because it ensures that devices operating at lower voltages and power ratings can safely monitor and control higher voltage systems, thereby maintaining both safety and functionality in electrical networks.