... ,best quality Tech data of 10kv,11kv SZ9 series on-load regulation distribution transformer1. Dtandards: GB1094-1996; JB/T10088-2004; GB ... , 11kV3. Voltage Regukation Mode: Off circuit tap changing or on load tap changing4. tapping Range: ±5%, ±2×2.5%, ±4×2 ... structure,High and low voltage coils are winding with oxygen free copper coil. All high voltage coils are made with several ...