F35g
SF6-free g3-Gas-Insulated Substations up to 145 kV
GE's F35g is a g3-gas-insulated substation up to 145 kV, up to 3,150 A and 40 kA using GE\’s revolutionary g3 gas mixture as an insulating and switching alternative to SF6.
The F35g g3-GIS is designed to deliver the same performances and reliability features as today’s existing SF6 switchgear, without SF6's environmental impacts. Compared to SF6 switchgear, they feature:
- Same dimensions and footprint, no drastic addition of raw material such as aluminum compared with other SF6 alternatives
- Same technical performance
- Same safety level
- Same reliability feature
Key Characteristics
- A drastically reduced impact of gas releases to atmosphere (99% vs. SF6)
- The lowest environmental impact during the whole life cycle:
- Impact on climate change: 72% reduction,
- Best-in-class Life Cycle Assessment (LCA) considering all environmental aspects from manufacturing to end-of-life
The F35 is a compact and accessible GIS solution, with a bay footprint below the market average. Up to 2 bays are assembled together, wired, tested and shipped enabling shorter site works.
GE’s F35g is the first SF6-free g3-gas-insulated substation up to 145 kV to complete ENA assessment in the UK.
F35g
SF6-free g3-Gas-Insulated Substations up to 145 kV
GE's F35g is a g3-gas-insulated substation up to 145 kV, up to 3,150 A and 40 kA using GE\’s revolutionary g3 gas mixture as an insulating and switching alternative to SF6.
The F35g g3-GIS is designed to deliver the same performances and reliability features as today’s existing SF6 switchgear, without SF6's environmental impacts. Compared to SF6 switchgear, they feature:
- Same dimensions and footprint, no drastic addition of raw material such as aluminum compared with other SF6 alternatives
- Same technical performance
- Same safety level
- Same reliability feature
Key Characteristics
- A drastically reduced impact of gas releases to atmosphere (99% vs. SF6)
- The lowest environmental impact during the whole life cycle:
- Impact on climate change: 72% reduction,
- Best-in-class Life Cycle Assessment (LCA) considering all environmental aspects from manufacturing to end-of-life
The F35 is a compact and accessible GIS solution, with a bay footprint below the market average. Up to 2 bays are assembled together, wired, tested and shipped enabling shorter site works.
GE’s F35g is the first SF6-free g3-gas-insulated substation up to 145 kV to complete ENA assessment in the UK.
Main Characteristics
Environment friendliness
- SF6-free using GE’s g3 gas mixture instead of SF6
- No pollution transfer in form of raw material increase
- GWP of the gas mass reduced by 99%
- Advanced sealing system
High availability
- Same principles, interfaces, operating mechanisms for both product in g3 and SF6
- Easy access to drives and accessories
- Pure-spring circuit breaker drives
Low costs of land and civil works
- One of the most compact GIS with bay footprint up to 45% below market average depending on kV rating allows to have low civil work and compact switchgear buildings
- Up to 2 bays 145 kV assembled, wired, tested and shipped
- Isolating device for voltage transformer and surge arrester
Smart Grid ready
- Smart grid features including full-digital monitoring, control and protection
- One of the best experiences and high data reliability
- Digital substation ready with LPITs (Low Power Instrument Transformers)
Specifications
| General ratings | |
| Reference electrotechnical standards | IEC |
| Voltages | Up to 145 kV |
| Insulating and switching medium | g3 gas mixture |
| Withstand voltages | |
| Short-duration power-frequency, phase-to-earth / across isolating distance | 275/315 kV |
| Lightning impulse, phase-to-earth / across isolating distance | 650/750 kVp |
| Frequency | 50 Hz |
| Continuous current | up to 3150 A |
| Short-time withstand current | 40 kA |
| Peak withstand current | 108 kAp |
| Duration of short-circuit | 3s |
| Circuit-breaker ratings | |
| First-pole-to-clear factor | 1.5 |
| Short-circuit breaking current | 40 kA |
| Short-circuit making current | 108 kAp |
| Operating sequence | O-0.3s-CO-3 min-CO |
| Drive type (three-phase or single-phase) | Pure-spring |
| Breaking time | 50ms |
| Closing time | 95ms |
| Mechanical endurance | M2 class |
| Capacitive switching | C2 class |
| Disconnector and low-speed earthing switch ratings | |
| Capacitive current switching | 0.1 A |
| Bus-transfer current switching capability | 2520/20 A / V |
| Mechanical endurance | M2 class |
| Make-proof earthing switch ratings | |
| Making current capability | 108 kAp |
| Switching capability - electromagnetic coupling | 80/2 A / kV |
| Switching capability - electrostatic coupling | 2/6 A / kV |
| Mechanical endurance | M1 class |
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