Active Harmonic Filters vs. SVG: Choosing the Right Power Quality Solution In modern electrical networks, non-linear loads—from variable frequency drives (VFDs) and UPS systems to LED lighting and EV chargers—are ubiquitous. These devices distort the ideal sinusoidal current waveform, generating harmonic currents that pollute the entire facility's power system. Left unchecked, h...
Medium Voltage Harmonic Filters: A Complete Selection Guide Medium voltage harmonic filters help industrial facilities, renewable energy plants, utilities, and infrastructure projects control harmonic distortion in their electrical systems. Harmonics can reduce power quality, increase equipment losses, create overheating, and interfere with normal system operation. A correctly designed harmonic fi...
Stop Hidden Power Costs from Automotive Dynamic Loads: Benefits of Power Quality System Upgrade Automotive assembly lines operate with extreme load volatility. High-power lifting equipment and robotic welders demand instantaneous reactive power during startup cycles. Traditional capacitor-based compensation systems fail to track these millisecond-level transients, leading to severe power fa...
Active Harmonic Filter Acceptance Test: 5 Critical Steps for Capacity Verification & Site Commissioning A purchase order does not prove that an Active Harmonic Filter will pass site acceptance. The project team must confirm what happens at the point of common coupling (PCC) when VFDs, rectifiers, welders, UPS systems, and capacitor banks operate together. Before acceptance...
Introduction: When the Protector Needs Protection Every facility manager knows the UPS is the last line of defense — the safety net that keeps critical operations alive when the grid fails or voltage sags. But there is an irony discovered only after equipment fails: the very load the UPS protects can quietly damage the UPS itself. Modern critical loads are almost always nonlinear. Rad...
In modern industrial environments, automated manufacturing lines, variable frequency drives (VFDs), dynamic robotics, and heavy inductive loads have placed unprecedented demands on power distribution networks. While investing in power quality equipment is vital to reduce downtime, avoid utility penalties, and improve energy efficiency, selecting the wrong solution can lead to costly equipment fail...
Installing a capacitor bank should improve power factor, reduce reactive power demand and release capacity in transformers and cables. However, some facilities find that their power factor remains below the utility target even after the capacitor bank has been commissioned. This does not necessarily mean the capacitor bank is defective. The cause may be incorrect sizing, changing loads, harmonic d...
A facility can operate normally on utility power and develop power quality problems after transferring to a standby generator. Drives trip, UPS systems report input faults and lights flicker—even though the load has not changed. Nonlinear loads are usually already generating harmonic current. The generator provides a weaker source, allowing the same current distortion to create greater volta...
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