OLTC Distribution Transformers are utilized with higher limit transformers where HT side voltage variety is visit and an almost steady LT voltage is required. OLTC is combined with the transformer itself. Numerous recordings from HV windings are conveyed to the OLTC chamber and associated with settled contacts. OLTC Distribution Transformer has an engine associated so that it can pivot in both the headings, for example, to turn the OLTC moving contacts clockwise and hostile to clockwise. Two push catches are fitted on the LCP (lowcontrol board) to turn the engine and henceforth the OLTC contacts. This development of contacts along these lines controls the yield LV voltage of the transformer.