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Substation Equipment: SF6 Circuit Breakers

SF6 Circuit Breakers
SF6 circuit breakers operate to switch electric circuits and equipment in and out of the system. These circuit breakers are filled with compressed sulfur-hexafluoride gas which acts to open and close the switch contacts. The gas also interrupts the current flow when the contacts are open.

Figure 1. SF6 gas power circuit breaker
Figure 1. SF6 gas power circuit breaker 		Figure 2. Live tank SF6 gas power circuit breaker
Figure 2. SF6 gas power circuit breaker
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