Automatic Power Factor Correction (APFC) panels are electrical control panels designed to improve the
power factor of an electrical system. They monitor the power factor of the system in real-time and
automatically adjust the reactive power to achieve and maintain a desired power factor. APFC panels offer
several benefits, including reduced energy consumption, improved system efficiency, and minimized
penalties from utility companies due to poor power factor.
Here are some common features and solutions provided by APFC panels:
- Power Factor Monitoring: APFC panels continuously monitor the power factor of the electrical system
using sensors or meters. They measure the active power, reactive power, and apparent power to calculate
the power factor. Real-time data is displayed on the panel for easy monitoring.
- Automatic Capacitor Bank Control: APFC panels control the switching of capacitor banks based on the
power factor readings. Capacitor banks are connected in parallel to the system and provide reactive
power compensation. The APFC panel uses contactors or solid-state relays to switch the capacitors on or
off as needed to maintain the desired power factor.
- Programmable Set points: APFC panels allow users to set the desired power factor according to their
specific requirements. The panel compares the actual power factor with the set point and triggers the
appropriate switching of capacitor banks to achieve the desired power factor level.
- Reactive Power Optimization: APFC panels optimize the reactive power compensation by automatically
adjusting the capacitor banks. They ensure that the system maintains a power factor as close to unity
(1) as possible, minimizing reactive power losses and improving system efficiency.
- Harmonic Filtering: APFC panels may include harmonic filters to reduce the impact of harmonics on the
system. Harmonics are unwanted distortions in the electrical waveform that can affect the power factor.
Filters help mitigate harmonics and maintain a clean power supply.
- Protection and Safety: APFC panels incorporate various protection features to safeguard the system.
These can include overvoltage protection, under voltage protection, overload protection, short circuit
protection, and temperature monitoring of capacitors.
- Data Logging and Reporting: APFC panels often have data logging capabilities to record power factor
readings, switching events, and other relevant data. Some panels also offer reporting features, allowing
users to generate reports on power factor performance and energy savings.
- Communication and Integration: APFC panels can be integrated into a larger energy management system or
connected to a supervisory control and data acquisition (SCADA) system for centralized monitoring and
control. They may also support communication protocols such as Mod bus or Ethernet for data exchange
with other devices.
Implementing an APFC panel solution can help optimize power factor, reduce energy consumption, and
improve the overall efficiency of electrical systems. These panels are commonly used in industrial and
commercial applications where reactive power compensation is critical to minimize electricity costs and
improve power quality