| | · | Adoption of high capable and reliable hydraulic mechanism for circuit breaker | · | 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 | · | Certificated by the newly revised IEC standards | · | Adoption of the combined-disconnector and earthing switch (3-position switch) | · | Easy transport, installation and maintenance during GIS working | | | | | Item | 170kV GIS | Model | 170SR | Rated Voltage (kV rms) | 170 | Rated Short-circuit Breaking Current (kA rms) | 31.5 / 50 | Rated Current (A rms) | 2000 / 3000 / 4000 | Rated Frequency (Hz) | 60 | Rated Power Frequency Withstand Voltage (kV rms) | 325 | Rated Lightning Impulse Withstand Voltage (kV peak) | 750 | Rated Switching Impulse Withstand Voltage (kV peak) | - | Rated Gas Pressure (Mpa) | 0.6 / 0.4 | | | | | 170SR (2000/3000/4000A) | · | Circuit Breaker | | - Hybrid puffer method for arc extinction operated by hydraulic mechanism | · | Make-proof Earthing Switch | | - Motor spring operation | · | Combined-Disconnector and Earthing Switch | | - Motor or Manual operation | | |