Automatic Power Factor Regulator

An Automatic Power Factor Regulator (APFR) is a sophisticated control device designed to maintain optimal power factor in electrical installations automatically. The functional highlights of this product are numerous. Firstly, it determines capacitor bank switching needs by calculating reactive power, ensuring highly accurate compensation. It features high-precision measurement of the power factor with a broad numerical display range. The unit includes an automatic phase recognition capability that correctly aligns voltage and current signal phasing. For operational versatility, this Automatic Power Factor Regulator offers two selectable work modes: a pre-programmed Fully Automatic mode and a user-defined Manual Setting mode. Its interface is designed for user-friendliness and ease of operation. All key control parameters are digitally adjustable, providing an intuitive and convenient configuration experience. The product can operate in two distinct methods: Automatic Run and Manual Run. It incorporates essential safety protections against over-voltage and under-voltage conditions. A data retention feature provides power-down protection, ensuring no loss of settings. Furthermore, it is designed with a very low current signal input impedance, specified as ≤0.01Ω. The Work Modes of this product cater to different application requirements. The Fully Automatic mode is the factory-default configuration, where the product is shipped with all parameters pre-set in the most logical and effective arrangement. In this mode, correct wiring is the only requirement for immediate and correct operation-no user intervention is needed. The Manual Setting mode grants the operator precise command over the switching sequence of capacitor groups, effectively eliminating the risk of switching oscillations.

This makes the Automatic Power Factor Regulator well-suited for all working environments, and particularly valuable in situations characterized by light load conditions and the presence of large capacitor banks. To guarantee the specified performance and service life of your product, please observe these installation and working conditions:

• 1) Install at an altitude not higher than 2500 meters above sea level;
• 2) Ensure the ambient temperature remains within -25℃ to +50℃;
• 3) Control air humidity to not exceed 50% at 40℃ and 90% at 20℃;
• 4) Locate the unit in an environment free from corrosive gases, conductive dust, and flammable or explosive substances;
• 5) Select a mounting site that is not subject to severe vibration or persistent mechanical shock.

1. The controller's operating voltage and current can be connected to phase BC voltage and phase A current; phase AB voltage and phase C current; phase AC voltage and phase B current.

2. The sampling currents l_a and l_n must be taken from the total load (main cabinet) current line, and must not be taken from the capacitor bank.

3. The voltage at the controller's output terminals 1-12 is the same as that at terminal V(Us).