What is the purpose of the potential coil being high in inductive reactance?

The purpose of having a potential coil high in inductive reactance primarily revolves around its ability to create a phase difference between current and voltage, specifically a 90 degrees lag in the current. This characteristic is crucial in applications such as voltage transformers or potential transformers, where precise phase relationships are important for accurate measurement and to ensure proper operation of protective relays and instruments.

When a potential coil has high inductive reactance, it means that the coil is primarily inductive; thus, the current flowing through it lags behind the voltage by approximately 90 degrees. This lagging behavior is significant in alternating current (AC) systems because it enables the proper functioning of devices that depend on the exact relationship between voltage and current to operate correctly and to provide reliable readings.

In contrast, while reducing voltage fluctuations or increasing power factor may also be beneficial in certain contexts, these functions do not specifically relate to the inductive nature of the potential coil. Additionally, enhancing signal strength typically pertains to situations involving amplification or signal propagation rather than the fundamental behavior of inductive coils in terms of phase relationships.