In an effort to increase load capacity and meet the needs of its customers, Con Edison hired Gannett Fleming to provide design and support services to separate two legs – L&M – of the G23 345 kilovolt feeder. The feeders are underground, oil filled, pipe-type cables. Major substation renovations at the Goethals switchyard on Staten Island, N.Y., and the Linden Co-Generation switchyard in New Jersey, owned by General Electric, were necessary for this project.
What We Did
At the Linden Co-Generation site, our team used gas insulated switchgear systems. This technology allows the equipment to be installed on a much smaller footprint and inside a building – as opposed to the conventional approach of having all equipment outdoors on concrete foundations. The Goethals switchyard utilizes conventional air-insulated switchgear equipment.
Key Features
- Separating two legs of a 345 kilovolt feeder into separate circuits.
- Gas insulated switchgear configuration because of space constants.
Sustainability Features & Outcomes
- Updated equipment leads to an improved level of safety.
- Compact design reduces space requirements.
- High reliability reduces long-term maintenance needs and costs.
