The HD2000 Series Engineering-Class Variable Frequency Drive (VFD), developed by COENG Electric, replaced the original imported-brand AC variable frequency drives (Units 3-6, 15, 17, and 18) at a high-speed bar main rolling line in a Hebei steel plant in The retrofit was completed during a short plant overhaul period, achieving seamless integration. Post-upgrade, the production line matched pre-retrofit shift output levels and has since operated with continuous stability and reliability.
