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  • USA USA  
  • Last Updated:
    Posted on: 21 Mar 2024

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RFQ Details

SF6 is a non-hazardous, inert gas that is used both as an arc quenching and insulating medium in high-voltage switchgear, circuit breakers and gas insulated substations. SF6-insulated equipment is predominantly used in the transmission system that manages the high voltages carried between the generating stations and customer load centers. The largest use of SF6 occurs in high-voltage circuit breakers. Here, in addition to providing insulation, SF6 is used to quench the arc formed when an energized circuit breaker is opened.

Disconnectors and ground switches use SF6, primarily, for insulation, and individually, they contain only slightly less SF6 than a circuit breaker. These devices are used to isolate portions of the transmission system where current flow has been interrupted (using a circuit breaker). Gas-insulated substations also use a significant amount of SF6. GIS installations house SF6-insulated circuit breakers, busbars, and monitoring equipment.


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