Distribution Transformers are used to reduce electrical energy from medium voltage (3.3-36 kV) to low voltage (≤400 V). Özçelik Transformatör sells oil type distribution transformers in the power range of 25 kVA – 5000 kVA with a variety of brands. They are manufactured with three or single phase, oil, natural cooling (ONAN), with off-load tap changer or on-load tap changer, to be used both outside and inside.