What is the rating of the automatic power factor correction controller for each main breaker?

The rating of the automatic power factor correction controller for each main breaker is determined by the specific requirements of the electrical system and the load characteristics it serves. A rating of 5.0 kVAR signifies a well-considered approach to achieving an optimal power factor while accommodating typical inductive loads in a commercial or industrial setting.

In power factor correction, the goal is to improve the efficiency of the electrical system by reducing the phase difference between voltage and current. The rating of 5.0 kVAR is likely derived from calculations involving the total reactive power demand of the connected load, which indicates that this value is sufficient to counterbalance the inductive reactive power present.

Using too low a kVAR rating (like 3.5 kVAR) may not provide adequate correction, leading to continued inefficiency. Conversely, a higher kVAR rating (like 10.0 kVAR or 15.0 kVAR) could cause over-correction, which might lead to leading power factors that can also be detrimental to system performance. Thus, 5.0 kVAR represents a balanced choice for effective power factor correction tailored to maintaining system stability while optimizing performance.