The United States is embarking on an ambitious journey to modernize its electrical infrastructure, with a key focus on transitioning 50% of its distribution network underground by 2040. This monumental shift is propelling the demand for underground MV (Medium Voltage) switchgear, heralding a new era in electrical distribution and management across urban and densely populated areas.

Several factors are driving this transformation. Firstly, the emphasis on grid resilience and reliability is pushing the demand for advanced MV switchgear solutions capable of withstanding various challenges, including extreme weather events and cybersecurity threats. Additionally, the integration of renewable energy resources like solar and wind necessitates flexible and reliable MV switchgear systems to manage variable power flows seamlessly.

The expansion of distribution grids to accommodate the growing popularity of Electric Vehicles (EVs) and Distributed Energy Resources (DERs) further amplifies the need for robust MV switchgear solutions capable of handling increased capacity and ensuring smooth integration. Moreover, the Inflation Reduction Act (IRA) is fostering an environment conducive to sustained growth and innovation in the MV switchgear industry, aligning with broader goals of modernizing the electrical grid.

Solid Insulated Switchgear (SIS) emerges as a frontrunner in this evolving landscape, offering superior protection against environmental factors with compact designs and reduced maintenance requirements. SIS technology is gaining traction for its reliability and resilience, particularly in underground installations. With considerations such as dielectric strength, environmental impact, safety, and regulatory compliance, SIS presents itself as an ideal choice for medium voltage insulation, complementing efforts to reduce greenhouse gas emissions and enhance grid sustainability.

While SF6 has been the traditional dielectric medium, alternatives like nitrogen and dry air are also being explored for their lower environmental impact. However, solid insulation stands out as a viable option, especially for underground electrical distribution networks, owing to its robust properties and suitability for the evolving needs of the MV switchgear market.

Learn more about underground MV switchgear market and the rise of solid insulation in the US in the full article written by Saad Habib.