Its core adopts WISCO low-loss silicon steel with 45° full miter splicing structure to curb vibration and running noise. Windings are made of high-purity oxygen-free copper with patented low-voltage design that removes zero-sequence loss, cutting no-load loss by 10%-20% and load loss by 5%-10%, plus 5%-8% increase on power factor. Reinforced coil construction greatly boosts anti-short-circuit performance and overload capacity.