Gas Insulated Substation (GIS) up to 245 kV is a compact, high-voltage substation that uses SF₆ gas as the primary insulating and arc-quenching medium instead of air, allowing significant reduction in size compared to conventional air-insulated substations. GIS technology up to 245 kV is commonly applied in urban, industrial, and space-constrained areas where reliability, safety, and minimal footprint are critical.
