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...
Your UPS (Uninterruptible Power Supply) is supposed to be your safeguard—the insurance policy that keeps your critical operations running when the grid fails. But here's the irony: that very same UPS might be quietly damaging your equipment, inflating your electricity bills, and threatening the stability of your entire electrical system. How? Through harmonic distortion. Let's break dow...
A plastics extrusion plant in Ohio replaced motor starters with VFDs and cut drive energy use by 4%. Three months later, its 1000 kVA transformer ran 18 K above nameplate temperature, two capacitor banks tripped on overcurrent, and the utility applied a power-factor penalty. THDi on the 480 V bus measured 32% at full production. Adding capacitors would make that worse, not better. The fix i...
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...
Walking into a steel melting shop, you feel the raw power. Arc furnaces roar, induction furnaces hum at high frequencies, and the electricity demand is staggering. But behind this impressive industrial might lies a hidden cost – poor power quality that drains profits and threatens equipment. The Real Trouble: Reactive Power and Start-Up Mayhem Electric arc furnaces and medium-frequency induc...
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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