Distribution transformer cores · manufactured in Shanghai, shipped worldwide
Planar Wound Core
Distribution transformer cores
Planar Wound Transformer Core
Single or double-frame planar wound cores with few joints and low exciting current, for small and medium distribution transformers and compact substations.
One-piece winding, fewer joints and lower leakage flux
Window dimensions customised to the transformer drawing
Low spring-back after annealing, high assembly accuracy
The planar wound core is wound flat in a single or double frame instead of being built up from laminations. Because the strip runs continuously around the window, the number of joints drops sharply and the exciting current falls with it. It is the natural choice for small and medium distribution transformers, box-type substations and reactor cores where a stable, repeatable core matters more than maximum flexibility.
We wind to your window dimensions rather than forcing your coil onto a standard core: send the drawing and the window will match it. Annealing is done in controlled-atmosphere furnaces so the strip keeps its magnetic properties and the core holds its geometry — spring-back stays low and the coil assembly slides in without rework.