The transition to a low carbon energy system is reshaping every part of the electricity network, from transformers and substations to the materials and components that make modern grids possible. One area attracting growing attention is switchgear. 

For decades, sulphur hexafluoride (SF₆) has been the preferred insulating gas for high and medium voltage switchgear because of its excellent electrical insulation and arc interruption properties. It has played an important role in building reliable electricity networks around the world. 

Today, however, the industry is entering a period of significant change. 

As environmental regulations evolve and utilities strengthen their sustainability commitments, manufacturers are accelerating the development of SF₆-free technologies. The conversation has moved beyond research and pilot projects. Utilities are now making purchasing decisions that will influence network performance for decades, while manufacturers are investing heavily in new production capabilities to meet changing demand. 

The transition represents one of the most significant shifts in switchgear manufacturing for a generation. 

Why the industry is moving away from SF₆ 

SF₆ has long been valued because it enables compact, highly reliable switchgear designs with excellent operational performance. However, its high global warming potential has led regulators around the world to encourage alternatives that reduce environmental impact while maintaining the reliability expected from critical grid infrastructure. 

For manufacturers, this is more than a materials challenge. 

Developing alternative technologies requires extensive research, product testing, certification and manufacturing investment. Every new design must demonstrate the same levels of safety, reliability and operational performance that utilities have come to expect from conventional equipment. 

For utilities, the challenge is equally significant. 

Switchgear often remains in service for several decades. Decisions made today will influence maintenance strategies, spare parts availability, operational procedures and future network upgrades for many years. 

Choosing the right technology is therefore about much more than regulatory compliance. 

More choice brings more complexity 

Unlike previous technology transitions, there is no single replacement for SF₆. 

Manufacturers are pursuing a range of approaches, including vacuum interruption combined with alternative insulating media, as well as new gas mixtures designed to reduce environmental impact while maintaining performance. 

This growing choice is positive for the industry, but it also creates new questions for procurement teams and engineers. 

When evaluating new switchgear, organisations are increasingly looking beyond initial purchase price to assess factors such as: 

• Whole life cost 

• Maintenance requirements 

• Asset lifespan 

• Safety and operational procedures 

• Availability of technical expertise 

• Performance under different operating conditions 

• Future compatibility with digital substations 

These considerations are becoming just as important as traditional technical specifications. 

Manufacturing is changing alongside the technology 

The move towards SF₆-free equipment is also transforming manufacturing. 

New designs require different production processes, revised testing procedures and investment in new manufacturing equipment. Suppliers throughout the value chain are adapting to support new components, sealing technologies, insulating materials and quality assurance requirements. 

This comes at a time when manufacturers are already responding to unprecedented demand from utilities, renewable energy projects, industrial electrification and expanding data centre infrastructure. 

Balancing increased production with new product development is one of the industry's biggest challenges. 

Manufacturers are therefore focusing not only on developing new products but also on improving factory efficiency through automation, digital quality management and smarter production planning. 

These investments will help determine how quickly the market can scale to meet future demand. 

Procurement is becoming more strategic 

Utilities have traditionally focused procurement on technical compliance, reliability and cost. 

While these factors remain essential, procurement teams are increasingly evaluating suppliers through a wider strategic lens. 

Questions now include: 

• Does the manufacturer have sufficient production capacity? 

• Can delivery schedules support major infrastructure programmes? 

• What experience already exists with alternative technologies? 

• How resilient is the supplier's manufacturing network? 

• What support is available throughout the asset lifecycle? 

These considerations have become increasingly important as project timelines tighten and demand for electrical infrastructure continues to grow. 

Procurement decisions are no longer simply about buying equipment. They are about building long-term resilience into the electricity network. 

Collaboration will determine success 

No organisation can deliver this transition alone. 

Manufacturers rely on utilities to provide operational feedback from real-world installations. 

Utilities depend on manufacturers to provide reliable, well-tested solutions backed by long-term technical support. 

Component suppliers continue developing new materials, insulation systems and manufacturing technologies that improve both performance and production efficiency. 

Standards organisations, regulators and testing specialists also play an important role in ensuring consistency across the market. 

The result is an increasingly collaborative value chain where knowledge sharing has become just as valuable as technological innovation. 

Digitalisation creates new opportunities 

The transition to SF₆-free switchgear is taking place alongside another major industry shift: digitalisation. 

Modern switchgear is increasingly supplied with embedded sensors, condition monitoring capabilities and digital communications that provide utilities with greater visibility into asset performance throughout its operational life. 

Rather than relying solely on periodic inspections, operators can use real-time data to monitor equipment health, optimise maintenance schedules and reduce the risk of unexpected failures. 

For manufacturers, digital technologies are also improving production quality through enhanced traceability, automated testing and greater process control. 

Together, these developments are helping create more intelligent electrical infrastructure from factory floor to substation. 

Looking ahead 

The move towards SF₆-free switchgear is not simply a regulatory milestone. It represents a broader transformation in how the industry designs, manufactures and operates critical grid infrastructure. 

The organisations that will benefit most are those taking a long-term view. Manufacturers investing in production capability, utilities evaluating lifecycle performance rather than upfront cost alone, and suppliers developing solutions that improve reliability across the entire value chain will all play an important role in shaping the next generation of electrical networks. 

As electrification continues to accelerate, these conversations will become increasingly important. 

CWIEME Berlin provides a platform where manufacturers, utilities, engineers, procurement professionals and technology providers can exchange knowledge, compare approaches and explore practical solutions together. Bringing the entire value chain into one place allows the industry to move beyond discussing challenges and focus on how they can be solved collaboratively. 

The transition away from SF₆ is only one chapter in the evolution of modern power systems, but it illustrates a wider trend across the industry. Success will depend not only on better technology, but on stronger partnerships, shared expertise and a collective commitment to building resilient electricity networks for the future.