What is the main function of a capacitor bank in a 3-phase system?

The main function of a capacitor bank in a 3-phase system is to improve voltage regulation and power factor. Capacitor banks are used to store and release electrical energy, which helps to stabilize the voltage levels in the system, ensuring that the electrical supply is consistent and reliable.

When reactive power is needed to balance the inductive loads in the system, capacitor banks can supply this reactive power, reducing the demand for reactive power from the grid. This not only improves the power factor, which is a measure of how effectively electrical power is being converted into useful work, but also helps to decrease energy losses in the system and avoid additional charges from power utilities related to poor power factor.

By enhancing voltage regulation, capacitor banks ensure that the voltage remains within acceptable limits despite variations in load, leading to better performance of connected equipment and overall system efficiency.