Series ODY Autotransformers offer a fast, economical, factory pre‑connected installation for transforming three phase lines from 208 to 240, or from 240 to 208. Simply bring in three wires on the line side and take out three wires on the load side. Series ODY offer an economical method of bucking and boosting 208 and 240 volt lines where the presence of a fourth wire neutral is not needed.