Adopted Energy Conservation Standards for Distribution Transformers, Office of Energy Efficiency & Renewable Energy
Energy-efficiency standards for distribution transformers are expected to result in savings inelectricalenergy. Themetric used to measure the efficiency of distribution transformers is percent efficiency, which is calculated by taking into account no-load losses (which are constant) and load losses (which vary by the square of the load) at a specified design load. An increase in the percent efficiency as measured above indicates that the distribution transformer is more energy-efficient. Details on the technical analysis of increased efficiency levels are provided in the TSD that accompanies DOE’s adopted energy conservation standard standard.