What is the impedance of the KDR reactors? KDR Low Z reactors are 3% and High Z reactors are 5%. The output reactors are 1.5% Z. Post navigationPrevious post: What is the difference between KDR and KLR reactors that are UL Listed and UL Recognized?Next post: What is the intended use of NEMA 1 enclosures for KDR or KLR?