だい規模 きぼ停電 ていでんではありませんでした
daiki bote idendewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 大規模停電

1. Was not a large-scale power outage.; It was not a widespread blackout.

Past/Perfective
Negative
Polite
Formal Register