Power Transmisson and Distribution

Gas Insulated Switchgear (25.8kV and 170kV)








Gas Insulated Switchgear (GIS) is a compact switchgear containing major substation equipment, such as gas circuit breaker, disconnecting switch and earthing switch in the metallic enclosure that is filled with SF₆ Gas.
Cheryong provides utilities and industries with state-of-the-art GIS for the reliable operation of transmisson and distribution system.



  • Compact Design 

  • High Reliability and Safety 
  • Low Life Cycle Cost
  • Easy operation

Standard Specification

Description Unit 25.8kV 170kV
Rated voltage kV 25.8 170
Rated current A 2000/630 1250/2000
Frequency Hz 50 or 60 50 or 60
Rated short circuit breaking current kA 25 50
Rated breaking time Cycle 5 3
Rated power frequency withstand voltage kV 60 325
Lightning impulse withstand voltage kV 150 750
Operating method Circuit Breaker Motor Spring Motor Spring
Disconnecting Swtich Motor/Manual Motor Spring/Motorl
Earthing Switch Motor/Manual
Operating sequence 0-0.3sec-CO-15sec-CO 0-0.3sec-CO-3min-CO
Rated SF₆ gas pressure Circuit Breaker kg/㎠.G 0.5 6.0
Other Equipment kg/㎠.G 0.5 5.0
Guaranteed minimum gas pressure Circuit Breaker kg/㎠.G 0.35 5.5
Other Equipment kg/㎠.G 0.35 4.5




No comments
Write CommentLIST