NEMA US 80035 2023 | Guide for Determining Energy Efficiency for Distribution TransformersThis standard consists of two parts, Sections 2 and 3, that offer a simplified methodology for the user to apply to determine the equivalent first cost of core and load losses. This information will permit the manufacturer to tailor the transformer design to the unique situation of each user. Section 4 defines the minimum efficiency, based on kVA and voltage considerations, that is recommended if the user elects not to follow the suggested methodology.
NEMA US 80017-2023 | Design Considerations for Transformers in Data Center Applications
NEMA US 80018-2022 | Transformers in DC Applications: Design Spec Considerations and Recommendations