Abstract: The technical advantages, performance comparison and performance requirements for silicon steel materials of the open three-dimensional core dry-type transformer used in super high-rise buildings were briefly expounded. It is analyzed that the transformer has the characteristics of miniaturization, lightness, low noise, safety and environmental protection, high efficiency and energy conservation, and solves the problems of transformer vertical transportation and noise disturbing people.

Key words: super high-rise buildings, open type, dry-type transformer