Power Quality
How to Select the Right APFC Panel for an Industry
APFC selection requires measured load behaviour and power quality data. A transformer rating alone does not define the required capacitor capacity.
Determine compensation
Record real power, existing displacement power factor, reactive demand and load changes. For sinusoidal conditions, Qc = P × [tan(arccos(PF1)) − tan(arccos(PF2))], with P in kW and Qc in kVAr. Harmonic-rich installations also require analysis of distortion power factor.
Choose steps and switching
Choose small enough steps to follow light-load demand without overcompensation. Contactor switching suits slower changes; thyristor switching may suit rapid variations when properly specified.
Assess harmonics and operating conditions
Survey drives, rectifiers, UPS loads and voltage/current harmonics before deciding on standard or detuned equipment. Confirm reactor-capacitor compatibility, temperature, ventilation, CT location and generator operation. Set the target to suit the utility and site study.
Discuss your project with GEESYS
Share your load details, site conditions and single-line diagram for a project-specific recommendation.
Explore related products | Contact GEESYSFurther reading: Schneider Electric low-voltage power factor correction documentation.
Related technical guides
- How to Select a Servo Voltage Stabilizer for Industrial Loads
- How to Calculate the Required Servo Stabilizer Capacity
- What Is an APFC Panel and How Does It Work?
- Online UPS vs Servo Stabilizer: What Is the Difference?