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SF6 Gas-Insulated-Substations servi os Siemens

TechTopics No. 53 - Siemens USA SF 6 first became available in the late 1940s in laboratory quantities. Large-scale industrial production began about 1953. By the 1960s, a number of designs of high-voltage SF 6 circuit breakers were available. Predominantly, these were so-called "two-pressure" designs, in which a relatively low pressure was used for insulation purposes, and a high-pressure system was used to ...

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