1. A sudden, temporary increase in electrical voltage or current in a circuit
The electrical surge damaged the computer during the thunderstorm.
O pico de tensão danificou o computador durante a tempestade.
2. An unexpected spike in power supply that can harm electronic devices
We need a surge protector to prevent electrical surges from destroying our equipment.
Precisamos de um protetor contra picos de tensão para evitar que os aparelhos sejam danificados.