SF6 Breaker
An SF6 circuit breaker is a type of electrical switchgear designed to protect electrical systems from damage caused by overcurrents or short circuits. It uses sulfur hexafluoride (SF6) gas as an arc quenching and insulating medium. This gas has excellent dielectric properties, meaning it is a very effective insulator, allowing for more compact designs compared to other types of breakers. When a fault occurs, the contacts inside the breaker open, and the SF6 gas rapidly cools and extinguishes the electrical arc that forms between the contacts, interrupting the flow of current. While highly effective, SF6 is a potent greenhouse gas, and the industry is working on minimizing emissions and developing alternatives.