Transformers

EPA suspended the ENERGY STAR Transformers specification effective May 1, 2007. In EPACT 2005, Congress passed a new minimum federal efficiency standard for transformers at the same level as the ENERGY STAR specification. All transformers manufactured on or after January 1, 2007 must meet these new criteria.

• Specification and test procedure Federal Register Notice, October 18, 2005 

Materials related to the ENERGY STAR suspension decision

Documents Related to the Transformers Specification

• Final Memo to Stakeholders — January 3, 2007  (PDF, 40 KB)
• Memo to Stakeholders — November 15, 2006  (PDF, 33 KB)

Stakeholder Comments on Proposed Suspension of the Transformers Specification

• Jefferson Electric  (PDF, 9 KB)
• Moorhead Public Service  (PDF, 9 KB)