Types of the Circuit Breaker (SF6, Vacuum Circuit Breaker) (in
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In this article, we will study about SF6 Circuit Breaker and its functioning in detail. Sulfur hexafluoride (SF6) circuit breaker is a type of high-voltage electrical switchgear device. it is used for protecting electrical power systems from short circuits and overload conditions.
They come in various voltage levels like – 66 KV SF6 Gas Circuit Breaker, 72.5 KV SF6 Circuit Breaker, 110 KV SF6 Circuit Breaker, 132 KV SF6 Circuit Breaker, 145 KV SF6 Circuit Breaker, 220 KV SF6 Circuit Breaker, 245 KV SF6 Circuit Breaker, 400 KV SF6 Gas Circuit Breaker.
In Double pressure SF6 circuit breakers the gas is stored at two different pressure levels: high pressure (around 20 bar) and low pressure (around 3-4 bar). This design provides better control over the release of SF6 gas during circuit breaker operation. The double pressure puffer type SF6 circuit breaker is more advanced design.
After the extinction of arc and interruption of current, the gas moves out from the gas outlets and with the suitable methods, the gas gets recombined and reconditioned for further use. In the SF6 circuit breaker the SF6 gas is stored at a high pressure around 20 BA in a pressure vessel.
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