Utilities are warning that DOE mandating improved transformer efficiency too quickly would threaten grid reliability. The DOE’s plan is to require new liquid-immersed distribution transformers to use amorphous core steel. However, the U.S. doesn’t produce enough of that steel so making replacements would be tough. Despite this, the sole domestic producer of amorphous steel cores, Metglas, says they can meet demand.
Utilities are worried about new DOE transformer requirements
