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IEEE Guide for Loading Mineral-Oil-Immersed Power Transformers Rated in Excess of 100 MVA (65C Winding Rise) (Folded into C57.91-1995) (65C Winding Rise)
Revision Standard - Inactive-Withdrawn.
The guide covers modern power transformers rated above 100 MVA, three-phase equivalent and 65 °C rise. The general approach is tutorial.
Four different types of loading are considered:
The various effects of loading a transformer in excess of its nameplate rating are discussed. Temperature and maximum loading limitations are suggested.
This guide covers general recommendations for loading mineral-oil immersed power transformers manufactured in accordance with IEEE C57.12.00-1987 III' and having a maximum nameplate rating in excess of 100 phase.
Such transformers have an average winding rise of 65 °C maximum and a hottest spot rise of 80 °C maximum at rated load.
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