Most AHF and SVG quotations are built backwards. A buyer collects a short-circuit level, a transformer rating and a target THDi, then asks three suppliers for a price. The result is a device sized to a guess rather than to the disturbance. A power quality report already contains most of what is needed to size a harmonic filter or reactive compensator correctly, provided the reader knows which colu...
Industrial efficiency losses are not always mechanical. A plant can keep every machine healthy and still lose energy, capacity and uptime to harmonics, reactive power and three-phase current imbalance that never appear on a maintenance checklist. VFDs, rectifier-fed equipment and fast-switching electronics make production more efficient while making the network underneath less forgiving. This arti...
SVG sizing for power factor correction cannot be estimated from transformer capacity or a motor nameplate alone. Those figures describe how much load a site could connect, not how much reactive power the load actually exchanges with the supply at the point of common coupling (PCC). A Static Var Generator chosen from nameplate data will either leave the power factor short of target or spend on capa...
Capacitor bank overheating after adding VFDs is a power quality symptom, not a capacitor defect. VFD rectifiers inject harmonic current, the bank offers a low-impedance path at those frequencies, and parallel resonance between the bank and the supply can amplify that current until fuses open, contactors chatter and capacitor cans swell. A capacitor bank supplies reactive power to correct power fac...
English
français
Deutsch
español
العربية
中文
IPv6 network supported
