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[email protected]Switchgear and Substations - Electrical Engineering Portal· PDF file3.1 High-Voltage Substations 3 3.1.2 High-Voltage Switchgear – Overview High-voltage substations comprising high-voltage switchgear and devices with different insulating systems, air or gas (SF 6). When planning high-voltage substations, some basic questions have to be answered to define the type of high-voltage switch-gear:
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