... subsidiaries 2) No. 1 and biggest factory 3)lowest price,best quality Tech data of 10kv,11kv SZ9 series on-load regulation ... changing or on load tap changing4. tapping Range: ±5%, ±2×2.5%, ±4×2.5% or others5. Frequency: 50Hz; 60Hz6. Phase: Three phase7 ... average, no load current decreases 37.9%, load loss decreases 22.4% in average, it is the renew products for saving ...