go to the Gas-insulated switchgear product page Mahesh Borade asked on Feb 12th, 2015 in Gas-insulated switchgear

If we are using FAES, is it necessary to use Maintenance Earthing Switch? Why ?

Olav Knudsen , Principal Engineer, Gas-insulated switchgear

ABB's answer

If a FAES is installed in a section of the switchgear, it is technically not necessary to use an additional maintenance earthing switch or an external ground connection. The position of the FAES can be checked through a viewport and the drive can be mechanically locked (via padlock) to provide a safe working environment. 

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Area expert

  • Olav Knudsen

    Olav Knudsen

    Principal Engineer, Gas-insulated switchgear

    High Voltage Products

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