An Automatic Power Factor Correction (APFC) panel is a crucial device in electrical systems, designed to improve the power factor automatically. Manufacturing an APFC panel involves several key steps and components. First, a sturdy, modular enclosure is fabricated, often from mild steel, to house the electrical components. Inside, busbars are installed to distribute power, along with a main incoming circuit breaker for protection. The core of the panel is the microprocessor-based power factor controller, which acts as the 'brain.' This controller continuously monitors the power factor of the system using current transformers (CTs). Based on the measurements, the controller determines the required amount of reactive power and sends signals to capacitor duty contactors. These contactors then switch the appropriate capacitor banks on or off to inject or remove reactive power from the system. This dynamic process ensures the power factor stays within an optimal range, preventing penalties from utility companies and enhancing the overall efficiency and lifespan of electrical equipment.