感震 かんしんブレーカーではありませんでした
kanshimburēkādewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 感震ブレーカー

1. Was not a vibration-sensitive circuit breaker.; Was not an earthquake-detecting breaker.

Past/Perfective
Negative
Polite
Formal Register
Electrical Engineering