| | · | High insulation and reliability by metal enclosure filled with SF6 gas | · | Stability improvement by conductive and operating parts installation inside of the enclosure | · | Remarkable installation area reduction by compact design | · | Application in internal and external railload electric power system | · | Certificated by the newly revised IEC standards | · | One phase in one enclosure type(72.5SP), Three phase common enclosure type(72.5SP-1), Two phase common enclosure type(72.5SP-2) | · | Easy transport, installation and maintenance during GIS working | | | | | Item | 72.5kV GIS | Model | 72.5SP | 72.5SP-1 | 72.5SP-2 | Rated Voltage (kV rms) | 72.5 | Rated Short-circuit Breaking Current (kA rms) | 20 | 31.5 | 20 | Rated Current (A rms) | 2000 | Rated Frequency (Hz) | 60 | 50/60 | 60 | Rated Power Frequency Withstand Voltage (kV rms) | 140 | 140 | 160 | Rated Lightning Impulse Withstand Voltage (kV peak) | 325 | 325 | 350 | Rated Switching Impulse Withstand Voltage (kV peak) | - | Rated Gas Pressure (Mpa) | 0.5 / 0.3 | 0.6 / 0.4 | 0.5 / 0.3 | | | | | 72.5SP | · | Circuit Breaker | | - Puffer method for arc extinction operated by motor spring operation | · | Disconnector Switch | | - Motor & Manual operation | · | Earthing Switch | | - Manual operation | | |