SF6 gas-insulated metal-enclosed switchgear (GIS) integrates circuit breakers, disconnectors, earthing switches, current and voltage transformers, surge arresters, connecting busbars and other components, and is filled with high-performance SF6 gas featuring excellent arc-extinguishing and insulating properties as phase-to-phase and phase-to-ground insulation.
GIS offers numerous advantages including small footprint, immunity to external environmental influences, simple maintenance, long service life, and high economy over its full life cycle. For these reasons, GIS has been widely favored by users in various industries since its introduction.
The GFM-72.5/126/145 series SF6 gas-insulated metal-enclosed switchgear is widely applicable in industries such as power distribution networks, petrochemicals, metallurgy and steel, airports, rail transit, data centers and others.
Rated voltage: 72.5/126/145 kV
Rated current: 2000~3150 A
Power frequency withstanding voltage: 230/275 kV
Lightning impulse withstanding voltage (peak value): 550/650 kA
Rated short-circuit breaking current: 40 kA
Rated short-circuit making/breaking current (peak value): 100 kA
Rated peak withstanding current: 100 kA
4s short-time withstanding current: 40 kA
Rated operating sequence: 0-0.3s-CO-180s-CO
Number of rated short-circuit breaking operations: 20 times
Mechanical life: 10000 times
Rated voltage of energy storage motor: DC:110/220 V, AC:220 V
Rated operating voltage – Tripping coil: DC:110/220 V, AC:220 V
Rated operating voltage – Closing coil: DC:110/220 V, AC:220 V
Weight: ≤3000 kg