What is the advantages of Gas-Insulated Switchgear GIS

Usually we call GIS is SF6 Gas Insulated Switchgear, its advantage:

• Lower space requirements (up to approx. 70 % savings with 30 kV) compared to air-insulated switchgear
• Smaller transportation size and consequently easier shipping
• Increased reliability of operation due to hermetically sealed primary switchgear section (adverse impact such as from contamination, small animals, contact, condensation are excluded due to the encapsulation)
• Maintenance-free primary section (no lubrication and readjustment necessary)
• Better eco balance than air-insulated switchgear referred to the entire system life cycle