Core products are mainly used for the production of oil immersed transformer cores with a capacity of 30000 kVA and below for 110kV and below, as well as dry-type transformer cores for 35kV and below. Oil immersed power transformer cores include S11, S13, S20, S22 types, dry-type power transformer cores, SCB12, SCB14, SCB18 series transformer cores, which have straight seams, semi straight and semi diagonal seams, and full diagonal seams according to the core overlap method; According to the layered winding, it can be divided into 3 steps, 5 steps, and 7 steps. The above products can be customized according to customers' special requirements.