170kV Gas Insulated Switch Gear


The main equipment used in a substation, including a circuit breaker, disconnector, earth switch, potential transformer, current transformer, bus and lightning arrester, are built into a casing for insulation. SF6 gas, which has excellent arc extinguishing properties, is filled in to organize the electric power system. This is core equipment in a substation.

Characteristics of the Product
  • Each component and device is designed to allow for easy separation and withdrawal considering ease of inspection, maintenance and repair.
  • A hydraulic mechanism with high performance and reliability is applied to the actuator for a circuit breaker.
  • A 3-Position Switch is applied that integrates the functions of a disconnector and earth switch.
  • Control devices with high reliability and surveillance by various sensors are provided.

Power plant substation

Electric rail substation

Rated Voltage (kV) 170
Standard GIS IEC60517
CB IEC62271-100
Rated current(A) 2000 / 3000
Rated interrupting current(kA) 50
Power frequency withstand voltage(kV) 325/375
Lightning impulse withstand voltage(kV) 725/860
Rated short time withstand current (kA) 50
Rated SF6 Gas pressure
(kgf/c㎡·G at 20°C)
breaking part 6.0
others 6.0
Circuit breaker class E1 / C2 / M2
Manipulating method circuit breaker three-phase encapsulated hydraulic manipulation
disconnector three-phase encapsulated electric manipulation/electric spring manipulation
Earthing switch three-phase encapsulated manual manipulation/electric spring manipulation
Product Photo