Understanding the Problem with SF₆

SF₆ has long been favored for its excellent insulating properties and high arc-quenching efficiency. However, its extremely high global warming potential and long atmospheric lifespan (up to 3,200 years) make it one of the most environmentally harmful gases used in industrial applications.

According to environmental studies, SF₆ emissions account for approximately 0.5% of all man-made greenhouse gases, yet their impact is disproportionately large. Therefore, replacing SF₆ is a priority for achieving net-zero carbon goals.

New Generation of SF₆ Alternatives

To overcome these challenges, engineers and researchers have developed several viable alternatives. These new systems utilize natural-origin gases, vacuum technologies, and solid insulation to maintain high reliability and safety while minimizing environmental harm.

1. Vacuum Switching Technology
   Vacuum interrupters can handle high voltages and switching loads without the need for gas insulation. They offer long service life, reduced maintenance, and complete elimination of greenhouse emissions.

2. Gas Mixtures with Low GWP
   Alternatives such as fluoronitrile/CO₂ or fluoroketone/N₂ blends (like g³ and AirPlus) replicate SF₆’s dielectric strength with drastically reduced environmental impact.

3. Solid Insulated Switchgear (SIS)
   SIS uses epoxy resin and other solid materials as insulation instead of gas. This results in a sealed, maintenance-free, and highly compact design suitable for indoor and outdoor applications.

Performance and Reliability

Modern SF₆-free systems have proven themselves in medium voltage substations, wind farms, and industrial plants worldwide. They offer:

• Comparable or better dielectric performance

• Enhanced safety with no toxic decomposition products

• Minimal maintenance requirements

• Compliance with future environmental standards

With continuous innovation, these systems are expected to fully replace SF₆-based equipment within the next decade.

Commitment to a Sustainable Future

At DJ, we fully support the transition toward SF₆ alternative technologies. Our engineering team works to integrate environmentally friendly insulation solutions into switchgear, circuit breakers, and transformer systems that meet both performance and sustainability standards.

By choosing SF₆-free products, power utilities and industries can significantly reduce their carbon footprint and contribute to a greener electrical infrastructure. Together, we can power the world responsibly—without compromising the planet’s future.