Which equipment is used primarily for adjusting the flow of power in a distribution line?

The primary purpose of a voltage regulator in a distribution line is to maintain a consistent voltage level despite variations in load and input voltage. Voltage fluctuations can occur due to changing demand or other factors in the power distribution network, and these fluctuations can potentially harm equipment or cause inefficiencies in the power supply.

A voltage regulator adjusts the flow of power by varying the output voltage to ensure it remains within a specified range. This is crucial in maintaining the quality and reliability of electrical service to consumers. By continuously monitoring the voltage and making necessary adjustments, voltage regulators help keep the electrical system stable and efficient, ensuring that sensitive electronic equipment operates correctly and safely.

In the context of power distribution, the other equipment listed plays different roles. While transformers are used to change voltage levels and capacitors help in power factor correction and voltage support, it is the voltage regulator that specifically focuses on adjusting and stabilizing the flow of power in a distribution line. Therefore, the role of the voltage regulator is central to effectively managing distribution line performance.