Power Quality refers to how “clean” and “stable” the electricity supply is. It determines whether the voltage and current are within ideal ranges, stable in frequency, free of distortion, and properly balanced across all three phases.
A system may have electricity flowing, but if the quality is poor—fluctuating voltages, harmonics, low power factor—it can silently damage equipment, reduce productivity, and cause hidden costs.
Factor |
What It Means |
Common Effects |
Voltage deviation |
Overvoltage or undervoltage |
Motor overheating or torque loss |
Flicker |
Rapid voltage variation |
Light flickering, eye fatigue |
Frequency variation |
Non-50Hz/60Hz supply |
Misfunction in precision devices |
Harmonics |
Signal distortion from nonlinear loads |
Equipment overheating, control failures |
Unbalance |
Unequal voltage or current in phases |
Reduced motor lifespan |
Low power factor |
Excessive reactive power |
Utility penalties, extra losses |
Just like high blood pressure—it’s a silent killer for electrical systems.
Industries highly sensitive to power quality include:
Balancing inductive and capacitive reactive power is key to stable grid operation.
FGI provides a comprehensive portfolio:
Cost Area |
Without PQ Control |
With PQ Optimization |
Energy Bills |
Higher (penalties) |
Reduced |
Equipment Downtime |
Frequent |
Rare |
Maintenance Cost |
High |
Lower |
System Safety |
At risk |
Controlled |
Power Efficiency |
~75% |
>90% |
Power Quality is no longer a technical side-topic—it's a critical factor in industrial competitiveness. In the age of decarbonization, smart manufacturing, and digital energy, managing power quality is part of managing your business.
FGI is committed to helping industries worldwide achieve high-performance, clean, and reliable power systems.
Reach out to us for a free evaluation and tailored solution: