Abstract: The performance of oriented silicon steel is the main factor determining the loss of transformer. The implementation of the new energy efficiency grade standard puts forward higher requirements for oriented silicon steel. Combined with the development of transformer and oriented silicon steel, the relationship between transformer loss and the properties of oriented silicon steel were analyzed in this paper, and the demand prediction of oriented silicon steel after the implementation of the new energy efficiency grade standard was put forward.

Key words: energy efficiency grade, transformer, noload loss, load loss, oriented silicon steel