Accelerating Grid Decarbonization with the New GL316c 420 kV SF6-Free Circuit Breaker

As grid operators worldwide accelerate their transition toward net-zero, the pressure to eliminate high-global-warming-potential gases like SF6 from transmission infrastructure has never been greater. At GE Vernova, we are proud to answer this challenge with the launch of our latest innovation: the GL316c 420 kV SF6-free live tank circuit breaker, unveiled to the global energy community at CIGRE 2026 in Paris.

A Collaborative Achievement in Sustainability

The development of the GL316c is a milestone in our commitment to sustainable energy. This project was developed as part of the “LIFE SF6-free HV Breaker” initiative, a critical undertaking co-funded by the European Union’s LIFE Programme. This funding underscores our and EU’s dedication to accelerating the decarbonization of the grid through cutting-edge technology.

Sustainability Meets Performance

Part of our GRiDEA™ portfolio, the GL316c utilizes advanced CO2-O2 technology to deliver a significant reduction in carbon footprint over its entire lifecycle. Crucially, this transition does not require a trade-off in performance. The GL316c is engineered to operate seamlessly in the most demanding conditions, including temperatures as low as -50°C and highly active seismic zones, ensuring grid reliability when it matters most.

Seamless Integration & Digital-Native Capabilities

We understand that modernization must be efficient. The GL316c features the same dimensions as existing SF6 units, allowing for “drop-in” replacements that minimize substation modifications.

Furthermore, the GL316c is a digital-native solution. Every unit comes factory-integrated with the CSD100 point-on-wave controller, which:

  • Minimizes Onsite Activity: Factory-tested settings help minimize commissioning time and ensure consistent performance.
  • Enhances reliability: The CSD100 enables smooth shunt reactor switching, eliminating the risk of multiple high-frequency re-ignitions which helps avoid rapid degradation of the nozzle.
  • Advanced Monitoring: The device provides continuous tracking of the CO2-O2 interrupting medium.

These SF6-free GL316c live tank circuit breakers will be manufactured in GE Vernova’s factories in Villeurbanne, France and Noventa di Piave, Italy.