GE Vernova’s Gas-Insulated Lines (GIL) Dual Gas, available with SF₆ or SF₆-free with g3 gas, meet the challenges of electrical networks up to 800 kV.

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Gas-Insulated Lines
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Ready for future SF₆ gas regulations

Anticipating future SF₆ regulations, from 2022 onwards, GE Vernova’s versatile 420-kV SF₆-GIL are fully g³-gas compatible. This dual gas equipment allows TSOs to easily switch from SF₆ to GE Vernova’s SF₆-free g³ solution in the future.

Main Characteristics

Environment friendliness

SF₆ Gas-Insulated Lines

At 420 kV, SF₆ today – Ready for g³ gas tomorrow

Ready for future SF₆ gas regulations

Anticipating future SF₆ regulations, from 2022 onwards, GE Vernova’s versatile 420-kV SF₆-GIL are fully g³-gas compatible. This dual gas equipment allows TSOs to easily switch from SF₆ to GE Vernova’s SF₆-free g³ solution in the future.

Main Characteristics

Environment friendliness

SF₆-GIL Specifications

RATINGS     
VoltagekV253420550800
Standards 245IEC/IEEEIEC/IEEEIEC/IEEE
FrequencyHz24550/6050/6050/60
Withstand voltages, to earth
- Short-duration power-frequency
- Switching impulse
- Lightning impulse

kV
kV (peak)
kV (peak)

460
-
1050

650
1050
1425

740
1175
1550/1675

960
1550
2100
Continuous currentA4,0005,0005,000/6,0005,000
Short-time withstand currentkA63636363
Peak withstand currentkAp170170170170
Temperature°C-25/-30-30-25/-30-25/-30

g³ gas GIL Specifications

RATINGS   
VoltagekV362420
Standards IEC/IEEEIEC/IEEE
FrequencyHz50/6050/60
Withstand voltages, to earth
- Short-duration power-frequency
- Switching impulse
- Lightning impulse

kV
kV (peak)
kV (peak)

520
950
1175

650
1050
1425
Continuous currentA4,000/5,0004,000/5,000
Short-time withstand currentkA6363
Peak withstand currentkAp170170
Temperature°C-30-25

Applications

420 kV SF₆ GIL - Total length: 17,000 m

550 kV SF₆ GIL - Total length: 5,900 m

420 kV SF₆ GIL - Total length: 15,000 m

420 kV SF₆ GIL - Total length: 2,500 m

245 kV SF₆ GIL - Total length: 2,100 m

362 kV SF₆ GIL in shaft (140 m high) - Total length: 900 m

GE Vernova's Gas-Insulated lines (GIL) and Gas-Insulated Busbars (GIB) are field-proven to meet the challenges of electrical networks up to 800 kV for a variety of applications including distribution, transmission, power generation and heavy industry. GE Vernova has 50 years of expertise in GIL solutions and has installed more than 200 km of lines throughout the world. This experience enables the production of highly reliable GIL solutions with optimum designs and simplified installation.

Gas-Insulated Lines

For electrical networks up to 800 kV

GE Vernova's Gas-Insulated lines (GIL) and Gas-Insulated Busbars (GIB) are field-proven to meet the challenges of electrical networks up to 800 kV for a variety of applications including distribution, transmission, power generation and heavy industry. GE Vernova has 50 years of expertise in GIL solutions and has installed more than 200 km of lines throughout the world. This experience enables the production of highly reliable GIL solutions with optimum designs and simplified installation.

Better for the grid, better for the planet
  • SF₆-free with g³, GE Vernova's game changing alternative to SF₆ as insulating medium enables a reduction of 99% of global warming potential
  • First-in-class gas sealing system
  • g³-420 kV GIL is a dual gas busbar system also compatible with SF₆.

SF₆-free Gas-Insulated Lines

SF₆-free g³ Gas-Insulated Lines
For electrical networks up to 420 kV
Better for the grid, better for the planet
  • SF₆-free with g³, GE Vernova's game changing alternative to SF₆ as insulating medium enables a reduction of 99% of global warming potential
  • First-in-class gas sealing system
  • g³-420 kV GIL is a dual gas busbar system also compatible with SF₆.

Positive impact of 100 meters SF₆-free GIL

Calculate the CO2e reduction of my project with GE Vernova's g³ CO2 equivalent calculator

g³ gas GIL Specifications

RATINGS   
VoltagekV362420
Standards IEC/IEEEIEC/IEEE
FrequencyHz50/6050/60
Withstand voltages, to earth
- Short-duration power-frequency
- Switching impulse
- Lightning impulse

kV
kV (peak)
kV (peak)

650
1050
1425

650
1050
1425
Continuous currentA4,000/5,0004,000/5,000
Short-time withstand currentkA6363
Peak withstand currentkAp170170
Temperature°C-30-25/-30

Applications

NATIONAL GRID, UK - Sellindge Substation, 230 m of 420 kV GIL, 63 kA, 4000 A, The world first SF₆-free g³ GIL
SP ENERGY NETWORKS, UK - Kilmarnock Substation, 177 m of 420 kV SF₆-free g³ GIL, 63 kA, 4000 A
SSEN TRANSMISSION, UK - New Deer Substation, 1020 m of 420 kV GIL, 40 kA, 4000 A, The longest SF₆-free g³ GIL in operation