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Operating Characteristics of the Proposed Sampling Plans for Testing Distribution Transformers



O. Petersons, Ken L. Stricklett, C Hagwood


The sampling plan for efficiency testing contained in the Supplemental Notice of Proposed Rulemaking (SNOPR),Energy Conservation Program: Test Procedures for Distribution Transformers, are discussed. The proposed sampling plans test for compliance with standards for average energy efficiency. The SNOPR includes: a sampling plan for demonstration of compliance with a represented energy efficiency; criteria for substantiation of an alternative efficiency determination method; and a sampling plan for enforcement testing. Model calculations are presented that estimate the operating characteristics of the sampling plans, that is the probability of demonstrating compliance when testing a specific distribution of efficiencies.
Technical Note (NIST TN) - 1456
Report Number


distribution transformers, efficiency testing, Energy Policy and Conservation Act, operating characteristics, sampling plan


Petersons, O. , Stricklett, K. and Hagwood, C. (2004), Operating Characteristics of the Proposed Sampling Plans for Testing Distribution Transformers, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD (Accessed April 19, 2024)
Created April 30, 2004, Updated October 12, 2021