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Sulfur Hexafluoride high-voltage switchgears leakage rate enervac

MAINTENANCE OF POWER CIRCUIT BREAKERS· PDF fileHIGH-VOLTAGE CIRCUIT BREAKERS 5.1. FREQUENCY OF INSPECTIONS.-Most manufacturers recommend com­ plate inspections, external and internal, at intervals of from 6 to 12 months. Ex­ perience has shown that a considerable expense is involved, some of which may be unnecessary, in adhering to the manufacturer's recommendations of in­

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