IEEE PC57.91/D8, December 2023
IEEE Draft Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators

Standard No.

IEEE PC57.91/D8, December 2023

Release Date

2024

Published By

Institute of Electrical and Electronics Engineers (IEEE)

Scope

The contents of this guide describe the assumptions, techniques, and methods for estimating the effects of loading above nameplate of mineral-oil-immersed distribution and power transformers as well as step voltage regulators. Consequences due to loading above nameplate ratings are discussed including damage to insulation, production of gases in oil, and ultimately loss of life effects. In additio...