Energy Conservation Program: Test Procedures for Distribution Transformers

Pursuant to Sections 323(b)(10) and 346(a) of the Energy Policy and Conservation Act, as amended, (EPCA or the Act), 42 U.S.C. 6293(b)(10) and 6317(a), the Department of Energy (DOE or the Department) promulgates a rule prescribing test procedures for measuring the energy efficiency of distribution transformers under EPCA, definitions to delineate the products covered by the test procedures, provisions (including a sampling plan) manufacturers must use to implement the test procedures, provisions to allow manufacturers to use calculation methods to determine the efficiency of some of their models, and enforcement testing for distribution transformers. The Department will use the new test procedures in evaluating what energy conservation standards are warranted for distribution transformers other than the low-voltage dry-type. When DOE promulgates such standards, then the test procedures and other provisions adopted today will be used to determine the efficiencies and assess compliance of the transformers subject to these standards. For low-voltage dry-type distribution transformers, the new standards prescribed for them in section 325(y) of EPCA, 42 U.S.C. 6295(y), go into effect on January 1, 2007, and all of the provisions of today's rule will become applicable to those transformers at that time.