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Introduction Since the introduction of Gas Insulated Substations (GIS) in the late 1960s, sulphur hexafluoride (SF6) has become the favourite insulating and arc quenching medium thanks to its remarkable characteristics. However, SF 6 has the major drawback of presenting a global warming potential (GWP) if released to the atmosphere, which is 23,500 times higher than CO 2 and a lifetime in the
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3. Circuit Breakers High Voltage and Medium voltage switchgear such as oil circuit breaker, SF6 circuit breaker, air circuit breaker, gas circuit breaker, and vacuum circuit breakers are used to switch electric circuits and substation equipment in and out of the
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Sulfur hexafluoride. Formula: F 6 S. Molecular weight: 146.055. IUPAC Standard InChI: InChI=1S/F6S/c1 7 (2,3,4,5)6. Copy Sheet of paper on top of another sheet. IUPAC Standard InChIKey: SFZCNBIFKDRMGX UHFFFAOYSA N. Copy Sheet of paper on top of another sheet. CAS Registry Number: 2551 62 4. Chemical structure:
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2011/12/22Advantages and Disadvantages of use AC Voltage for Hipot Test One of the advantages of an ac hipot test is that it can check both voltage polarities, whereas a dc test charges the insulation in only one polarity. This may become a concern for products that actually use ac voltage for their normal operation.
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