[Legacy Report] High Efficiency Shielded-Toroidal Transformers
HIGHEST Transformers (HIGH Efficiency Shielded Toroidal transformers) are designed to help distribution network
operators to save energy. HIGHEST transformers have higher efficiency, greater over-load capability, and increased
reliability compared to the current standard. A HIGHEST transformer is dry-type and does not require oil; thus it is more
environmentally friendly and is not subjected to catastrophic explosions. The product costs about the same as an oil-filled
transformer. Thus, the final objective is to substitute oil-filled transformers with dry-type ones. The presentation will
cover some of the issues that utilities are facing with oil-immersed transformers, the standard transformer manufacturing
technologies, the new energy efficiency amendments, the objective of the toroidal transformers project, the technical
problems solved and the future development of the technology.