瞬間 しゅんかん でん だんじゃありませんでした
shunkanden danjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 瞬間電断

1. Was not a momentary power outage.; Did not experience a momentary power outage.

Past/Perfective
Negative
Polite
Terminal Form