High Efficiency Transformer

Abstract

The high efficiency transformer has developed that reduced the loss furthermore even from the characteristic standard value of JIS standard along with the movement of energy conservation of the world.First in this paper, we describe the changes of JIS and JEM standards with regard to a transformer after explaining the contents of the activity of energy conservation and the energy tax reformed system to promote the purchase of the energy conservation devices as the background which a high efficiency transformer has spread. Especially we are explaining in detail about the way of thinking the characteristic standard value of a high efficiency oil immersed transformer at JEM standard.Next, we propose a concrete method about such a measure plan to reduce the loss of a transformer, making an introduction of energy conservation technology and an explanation about a constitution of the loss by using a numerical formula.Also, explaining it about the difference among “a high efficiency transformer”“an ultra high efficiency transformer ”“an amorphous transformer” that is three high efficiency transformers appear on a present market, it is summarizing it in a comparative table about the characteristics, measure and constitution materials of these transformers.At last, we express about the selection method of a high efficiency transformer. The total cost comparison is important for us to take a better choice of it. As a concrete example, we are making a comparison with various kinds of high efficiency transformer based on the total cost that added the initial cost to the calculated running cost by transformer loss on the depreciation years 10 and the load factor 60%.