APFC Panels Unveiled - Understanding Their Functionality and Advantages for Power Factor Correction - Control Panel - Lubi Electronics

An APFC (Automatic Power Factor Correction) panel is an essential component in industrial electrical installations. Its primary function is to monitor the power factor of the system and automatically correct it to maintain a high power factor. In this blog, we’ll explore the content related to APFC panels in detail.

What is an APFC panel, and how does it work?

An APFC panel is an automatic device that monitors the power factor of an electrical system and corrects it automatically by switching capacitors on or off. It works by measuring the power factor of the load and comparing it with a set point. If the power factor is below the set point, the panel switches on capacitors to improve the power factor. Similarly, if the power factor is above the set point, the panel switches off capacitors to maintain the power factor.

Advantages of using an APFC panel

Using an APFC panel in an industrial installation has several advantages, including:

Energy savings: A high power factor means less reactive power, which translates to lower electricity bills.

Improved equipment life: A low power factor can cause voltage drops, which can damage equipment. An APFC panel maintains a high power factor, leading to longer equipment life.

Compliance with regulations: Many countries have regulations mandating industrial installations to maintain a high power factor. An APFC panel ensures compliance with these regulations.

Components of an APFC panel

An APFC panel consists of several components, including:

Capacitor banks: These are capacitors that are switched on or off to maintain a high power factor.

Contactor: A contactor is an electromechanical switch that controls the connection and disconnection of the capacitor banks.

Controller: The controller is the brain of the APFC panel. It measures the power factor and controls the switching of the capacitors.

Protection devices: APFC panels include several protection devices, including fuses, circuit breakers, and surge protectors, to protect the panel and the equipment from damage.

Installation and maintenance of APFC panels

Installing an APFC panel requires expertise and knowledge of electrical installations. The panel must be installed in a dry, well-ventilated area, away from sources of heat and moisture. Regular maintenance is essential to ensure that the panel functions optimally. Maintenance activities include cleaning the panel, checking the capacitor banks for defects, and testing the contactors and protection devices.


In conclusion, an APFC panel is an essential component in industrial electrical installations. Its function of maintaining a high power factor has several advantages, including energy savings, improved equipment life, and compliance with regulations. Understanding the components and maintenance of an APFC panel is essential for optimal performance and longevity.

Written by Lubi Control Panel

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