We design and produce dry type iron core tuned and untuned filter reactor and other various reactors. Using high quality low looses silicon sheet and arranged non-bobbin coil winding, vacuum pressure impregnating process and solidify baking process to achieve insulation class F or H. It is applied in low voltage reactive power compensation and active or passive harmonic filter combined with condenser in cabinets to achieve compensation reactive power and harmonic filter in network.