Substation EquipmentGas Circuit Breaker

Gas Circuit Breaker

Our Gas Circuit Breaker is the dead tank type designed for rated interrupting current up to 31.5kA, which makes effective use of the high arc-extinguishing and insulation ability of SF6 (sulfur hexafluoride) gas.

(1) Single pressure type (puffer type) arc-extinguishing


  • Simplified structure and operation
  • Excellent fault current interrupting ability
  • 3-cycle interruption

(2) Dead tank construction


  • Built-in current transformers
  • Saving installation cost and space
  • Excellent seismic performance with low center of gravity
  • Easy maintenance / inspection

Main ratings

Applicable standard JEC-2300
Rated voltage [kV] 72 / 84
Rated normal current [A] 800, 1200, 2000
Rated breaking current [kA] 25
Rated making current [kA] 63
Rated short-time current 25(2sec)
Rated break time [cycles] 5, 3
Rated operating duty O-1min-CO-3min-CO

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