The wound core is made of cold rolled high carbon silicon steel sheet.It is wound into a closed frame--shaped structure by anneal-ing treatment, Wound core is with high filling factor. There is no air gap in the magnetic circuit.Both HV and LV windings are continu-ously wound on the core limb with good concentricity and perfor-mance of tightness. With characteristics of low lass and low noise, it is the new generation of high-tech, high-performance, and energy-saving products, widely used in power supply and distribu-tion system.

Main functions and characters

●The wound core shapes by winding with no cutting and no air gaps.
●The core has annealing treatment.
●Seamless iron cores greatly reduce the magnetic orientation. Its no-load current decreases by 60-80%, compared to common type transformers.
●Continuous winding takes advantage of silicon steel orientation, making no-load loss reduced by 20-30%.
●After annealing, their magnetic properties can be restored to the original level.
●Wound core itself is a seamless integral part with compact structure.Noise can be reduced by more than 10dB.

S9-M Series Three-phase Double-winding Distribution Transformers with off-circuit Tap Changer

S11-M Series Three-phase Double-winding Distribution Transformers with off-circuit Tap Changer