Distribution transformer with circular section of amorphous-core

In distribution transformer design, main stress is to reduce core losses. To reduce core losses in distribution transformer cold-rolled grain oriented (CRGO) steel is preferred by manufacturers. Amorphous material has very less core losses compared to CRGO steel, therefore it is being seen as a good substitute of CRGO steel. Now-a-days some manufacturers are using amorphous material in miniature andmedium size transformers; however the cost of amorphous core transformer is higher than the cost of CRGO core transformer. In amorphous core transformers manufacturers are using square section of core. With square section of core, mean length of winding turn is more which causes more material cost and more copper losses. Here a comparison is being presented among CRGO core distribution transformer(CCDT), amorphous core distribution transformer with square section of core (AMDTS), and amorphous core distribution transformer with circular section of core(AMDTC), in terms of efficiency and cost. It is shown that the cost of amorphous core transformer reduces and efficiency improves, if a circular section of core is adopted in place of square section.