ANSI C84.1 specifies that at your meter connection, you should get between 114-126VAC and 228-252VAC across the 2 phases. I'm not aware of any duration or continuity of service spec.
I'd (calmly) yell at your utility. Strongly request they put a recording meter on your service for at least 7 days. Strongly request they share the results with you, and rectify the situation. Tell 'em you got life-support equipment in the house (grin).
I'd (calmly) yell at your utility. Strongly request they put a recording meter on your service for at least 7 days. Strongly request they share the results with you, and rectify the situation. Tell 'em you got life-support equipment in the house (grin).