Gas-insulated switchgear ELK-3 up to 550 kV
High performance ratings in a compact design
The gas-insulated switchgear ELK-3 for ratings up to 550 kV, 6300 A, 80 kA is applied in all 420 kV and 550 kV grids worldwide. More than 1,500 installed circuit breaker bays demonstrate proven excellent performance of our product. ELK-3 is available with several options for the highest requirements. Some of the places where the largest 550 kV GIS has been installed worldwide include Three Gorges Dam-China and Itaipu Binacional-Brazil/Paraguay hydro power plants.
Applications
- Power transmission
- Integration of renewable power generation units to the grid
- Industry applications
Why Hitachi Energy?
- High-performance ratings
- High ratings up to 6300 A currents and 80 kA short circuit current
- Monitoring, control, protection and communication features for smooth integration into digital substation systems using IEC 61850
Brief performance data
| GIS ELK-3 | ||
|---|---|---|
| Rated voltage [kV] | 420 | 550 |
| Rated frequency [Hz] | 50/60 |
|
| Rated short-duration power-frequency withstand voltage (1 min) [kV] | 650 | 740 |
| Rated lightning impulse withstand voltage (1.2/50 µs) [kV] | 1,425 | 1,675 |
| Rated switching impulse withstand voltage (250 / 2,500 µs) [kV] | 1,050 | 1,300 |
| Rated normal current – busbar / feeder [A] | 5,000 | 6,300/5,000 |
| Rated short circuit-breaking current [kA] | 63 | 63/80 |
| Rated short-time withstand current (up to 3 s) [kA] | 63 | 63/80 |
| Rated peak withstand current [kA] | 170 | 171/216 |
| Bay width [mm] | 2,160/2,700 | 3,120 |
| Ambient temperature range [°C] | -30 … +55 | |
| Installation | indoor / outdoor | |
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