Which effect occurs when a capacitor bank is introduced to a circuit?

Introducing a capacitor bank into a circuit primarily enhances the overall power factor of the system. A power factor is a measure of how effectively electrical power is being converted into useful work output. When capacitor banks are added to a circuit, they provide reactive power (VARs), which helps offset the inductive reactive power caused by devices like motors and transformers. This reduction in the amount of reactive power that needs to be supplied by the utility leads to a more efficient use of electrical power.

As the power factor improves, the system can operate at a more efficient level, reducing the demand for reactive power from the grid and helping to lower the utility's losses associated with power generation and transmission. This improvement is particularly beneficial for industrial or commercial applications, where maintaining an optimal power factor can reduce costs and enhance system reliability.

In contrast, introducing a capacitor bank does not typically increase system load, decrease voltage levels, or lead to higher line losses, which helps reinforce the significance of its impact on improving the overall power factor in an electrical system.