C57.12.10-1988 - American National Standard for Transformers - 230 kV and Below 833/958 Through 8333/10 417 kVA, Single-Phase, and 750/862 Through 60 000/80 000/100 000 vKA, Three-Phase Without Load Tap Changing; and 3750/4687 Through 60 000/80 000/100 000 kVA With Load Tap Changing - Safety Requirements | IEEE Standard | IEEE Xplore