Arabelle Solutions' generators offer reliability, a high operating performance and adaptability to different nuclear reactor power output levels and cooling mediums.
Stainless steel technology for stator winding cooling
Our proprietary stainless steel cooling tubes and water boxes of the stator winding bars prevent plugging by copper oxide build-up and help prevent higher costs of maintenance for stator bar cleaning. They also mitigate forced outages due to water leaks and allow for higher water-cooling speeds, raising efficiency.
Our first generator build using stainless steel was commissioned in 1969—and is still in operation today without any stator rewind.
Our generator portfolio
Configured to help lower plant life-cycle costs and maintenance, Arabelle Solutions' generators are based on our 50 plus years of experience. We continue to innovative to improve safety, quality and reliability and meet customers' evolving needs.
| Product Family | Cooling Technology | Efficiency (up to) | Power Output Range (MVA) |
|---|---|---|---|
| GIGATOP 4-pole | Hydrogen – Water | 99% | 800 – 2,235 |
| GIGATOP 2-pole | Hydrogen – Water | 99% | 600 – 1,400 |
| TOPAIR | Air | 98.7% | 165 - 400 |
| TOPACK | Air | 98.7% | 40 – 165 |
Self-retightening, end-winding support
GIGATOP generators have a massive outer support to limit overhang vibration and movement. Its self-retightening, end-winding support system allows thermal expansion of the bars while simultaneously tightening the winding-in radial and tangential directions. This system reduces maintenance costs as it can be retightened with the rotor in place.
Concave-convex wedges
The concave-convex wedges used in our generators are uniquely engineered to sustain pressure on the stator bars. This constant pressure prevents radial movements of the winding and reduces the likelihood of loosening effects. If found loose during inspections, they can be retightened — reducing costs of full stator slot rewedging.
Our generator services portfolio
Boosting power in China and France
In 2019, China’s largest nuclear power generator in service installed one of our Gigatop 4-pole generators for their nuclear power plant—which boasts a rating of 1,660 MW and a load factor of 82.2%, helping supply 12 TWh of electricity to the Chinese grid.
That same year, another Gigatop 4-pole generator rated 1,495 MW produced 11.6 TWh of low-carbon electricity for the French grid, representing an 88.6% load factor. This equals the average yearly consumption of 2,500,000 households.