Europe Indoor Air & Gas Ring Main Unit Market

The electrification of transportation, heating, and industry, the growing integration of renewable energy sources, and the rapid expansion of energy-intensive infrastructure, such as data centers, are significantly increasing the load and complexity of Europe’s electricity distribution networks. According to the European Commission, electricity consumption in the European Union is expected to increase by approximately 60% by 2030, while nearly 40% of the existing distribution infrastructure is already over 40 years old, underscoring the urgent need to modernize aging medium-voltage (MV) assets and secondary substations.

Sulfur hexafluoride (SF6) offers excellent dielectric strength, high reliability, and space-saving characteristics; therefore, it is the preferred insulating medium in gas-insulated RMUs. However, SF6 has a high global warming potential, approximately 23,500 times greater than that of CO2. The growing emphasis on reducing greenhouse gas emissions and achieving net-zero emission goals has resulted in the introduction of the revised F-Gas Regulation (EU) 2024/573, which established a clear phase-out roadmap for SF6-containing switchgear. Under this regulation, the installation of new SF6-based medium-voltage switchgear for primary and secondary distribution applications up to 24 kV will be prohibited from January 1, 2026, and the restriction will be extended to medium-voltage equipment above 24 kV and up to 52 kV from January 1, 2030. Furthermore, from January 1, 2035, the use of newly produced SF6 for maintenance and servicing of existing switchgear will also be prohibited, with only reclaimed or recycled SF6 permitted under specific conditions.

Europe’s accelerating transition toward clean energy, supported by ambitious decarbonization targets and growing investments in renewable generation and electrification, is driving the need for reliable, flexible, and efficient medium-voltage (MV) distribution infrastructure. In 2025, wind and solar generated 30% of EU electricity, and the EU targets a minimum of 42.5% renewable energy in its overall energy consumption by 2030. Additionally, the number of public EV charging points increased by almost 20% in 2025, and the region has a target of 3.5 million public chargers by 2030. Renewable energy facilities such as solar photovoltaic (PV) plants and wind farms, along with BESS installations, require advanced MV switching and protection solutions to ensure safe grid connection, efficient power flow management, and rapid fault isolation. Furthermore, the increasing deployment of high-power EV charging stations is placing additional demand on electricity distribution networks, necessitating upgrades to local MV infrastructure. Indoor RMUs support these developments by enabling efficient power distribution, improved network flexibility, and seamless integration of new electrical loads..

The growing deployment of smart grids, digital substations, and automated distribution networks across Europe is transforming conventional indoor Ring Main Units (RMUs) into intelligent assets equipped with Intelligent Electronic Devices (IEDs), Remote Terminal Units (RTUs), sensors, communication gateways, and remote monitoring capabilities. While these advancements enhance operational efficiency, enable predictive maintenance, and support faster fault detection and restoration, they also expand the cyberattack surface of medium-voltage (MV) distribution infrastructure. As indoor RMUs become increasingly connected to SCADA systems, Distribution Management Systems (DMS), and IEC 61850-based communication networks, they are more exposed to cybersecurity threats, including unauthorized access, malware attacks, data manipulation, and disruption of critical grid operations. The growing digitalization of substations and the use of IEC 61850 communication protocols have created new cybersecurity challenges, as legacy power infrastructure was originally designed for isolated operation rather than interconnected digital environments.