The eco-friendly switchgear is a key device that encloses the interrupter, disconnector, grounding part, PT, CT, etc., in a metal enclosure and fills the inside with environmentally friendly dry air to configure the power system. Installed in power plants, substations, and similar facilities, this switchgear aims to provide high-quality power supply by quickly interrupting load currents as well as fault currents arising from line faults and ground faults, thereby preventing the expansion of the faulted section.