معادلهای برق رفتن/ نوسان برق

power outage
(Am.), power cut (Br.) n. [c]
when there is no electricity for a time; a blackout: The power outage lasted an hour. • The district suffered repeated power cuts throughout the winter

 

• She keeps flashlights and candles handy in case of a blackout.

• He told his doctor he had been experiencing blackouts.

 

brownout
n. [c]
a temporary lowering of electric power, because of a technical problem or to economize: The brownout slowed down the office Internet. • The lights were dimmed during the brownout.
NOTE blackout (Br.)/outage (Am.) = a total electricity failure

 

• A brownout caused my computer screen to flicker a few times