1. Introduction: Our wound cores are widely used in distribution transformers, especially for s13 type energy-saving transformers in china; we could provide our customers with single phase wound cores, three phase wound cores; the capacity range from 10kva to 2500kva; due to its particular technology craft, its performance is better than traditional stacked cores, especially for pole-mounted single phase transformer. 2.Manufacturing requirements: Tolerance: see demonstrated graphic; the specified requirements should be coincide with customers drawings; Standard export package