Farady step down transformer application

Farady dry power transformers are used in transmission network of higher voltages for step-up and farady step down transformer application (400 kV, 200 kV, 110 kV, 66 kV, 33kV) and are generally rated above 200MVA. Power Transformers are used in Distribution Network so directly connected to the consumer so load fluctuations are very high. these are not loaded fully at all time so iron losses takes place 24hr a day and cu losses takes place based on load cycle. the specific weight is more i.e. (iron weight)/(cu weight).average loads are about only 75% of full load and these are designed in such a way that max efficiency occurs at 75% of full load.