History: Below is a listing of the Revisions and Changes made to this UFGS.

KEYPREPARING ACTIVITY (PA)A ArmyN NavyF Air ForceS NASA [ARCHIVED]
ACTIONN NewR RevisionC ChangeD Deletion
Release PA Action Change # Nature of Change or Revision
Nov-2023 N C 1 Updated information in Related Materials: Single-Phase Pad-Mounted Transformer Details; in response to CCRs 11442 and 14105, "ABB" has been updated to "ABB/Hitachi Energy in Reduced Submittal Requirements paragraph (1.4.2)
Nov-2022 N R Updated section to address CCRs
Nov-2019 N C 2 FAR/DFAR changes no longer permit the use of "brand name or equal" in the UFGS, therefore, the following language was removed from the paragraph/list WARNING SIGNS AND LABELS (2.6-a.), “(decals, Panduit No. PPSO710D72 or approved equal)”.
Aug-2018 N C 1 Sustainability updates required to coordinate with the Federal Codes and DoD policies and procedures.
May-2017 N R Revision included updating the minimum efficiency to meet 10 CFR 431, Subpart K, and meeting additional changes in transformer technology.
Nov-2013 N N Superseding UFGS 26 12 19.20 SINGLE-PHASE PAD-MOUNTED TRANSFORMERS