Three Phase Off Load Plate Tap Changer

Three phase plate off load tap changers are applied to oil immersed power transformer and distribution transformer. The power transformers are big in size and used for high power transfer applications, where the transmission voltage is greater than 33KV. It used in generating station and transmission substation high insulation level. The distribution transformer is used for the distribution of electrical energy at low voltage as less than 33KV in industrial purpose and 440V-220V in domestic purpose. It works at low efficiency at 50-70%, small size, easy in installation, having low magnetic losses & it is not always fully loaded.