High Voltage
Gas Circuit Breaker

Through HICO's impressive line of High Voltage SF6 Gas Circuit Breakers, boasting superior operational rates & reliable performance, we have become recognized as the most trusted supplier in the industry

Gas Circuit Breaker (GCB) is a switch, which by its excellent extinction performance and insulation feature of the SF6 gas, can input the normal current generated in the power system or block abnormal current.

Our SF6 GCB, with superior arc-quenching and insulation characteristics, is a dead tank type unit where the breaker is directly and mechanically earthed. With reduced failure rate and high reliability for frequent circuit operations, it boasts a strong operational record.


Model 72.5kV 362kV 800kV
Rated Voltage (kV) 72.5kV 362kV 800kV
Rated Short-circuit
Breaking Current (kA)
40 40/50/63 50/63
Rated Current (A) Up to 3,000 Up to 5,000 Up to 5,000
Rated Frequency (Hz) 50/60 50/60 50/60