RT null
T1 Supplement to the Transformers Policy Guide: “Accelerating the Global Adoption of Energy-efficient Transformers” - Procurement Guidelines
A1 United Nations Environment Programme, 
A2 Walsh, Anthony
A2 Oliva, Miguel
A2 Karmarkar, Mayur
A2 Bolduc, Christopher
A2 Singh, Adesh
A2 Blake, Patrick
A2 Edl, Madeleine
A2 Kasamsetty, Saikiran
A2 Scholand, Michael
K1 energy efficiency
K1 public procurement
YR 2022
FD 2022-01
LK https://wedocs.unep.org/handle/20.500.11822/43078
UL https://wedocs.unep.org/handle/20.500.11822/43078
NO This guide seeks to provide information about the IEC’s methodology and raise awareness amongst transformer specifiers about the TCO approach. The IEC’s specification and equations are all published in IEC Technical Specification (TS) IEC TS 60076-20 (Ed. 1.0) 2017 Annex A. In addition to this document, U4E has prepared an Excel spreadsheet tool1 which puts the IEC equations into a user-friendly spreadsheet, to facilitate the derivation of the calculation of the loss evaluation factors.
DS UN Environment Document Repository
RD Sep 20, 2026