Are your bushings compatible with next-gen switchgear?
Modern gas-insulated switchgear demands bushings compatible with new insulation gases, higher pressures, and evolving design standards.
Image for illustrative purposes
As the global energy system transitions, changes are also unfolding within substations and gas-insulated switchgear (GIS) systems. These shifts reflect a broader move toward environmental responsibility and regulatory compliance in the design and operation of electrical infrastructure.
While attention often centers on renewables and digital technologies, key enabling components like transformer bushings are now under closer scrutiny. Traditionally used insulation gases in GIS offered reliable performance, but increasing environmental concerns have led to the adoption of alternatives with lower climate impact. This transition has technical implications across switchgear systems, including design parameters, testing standards, and operating conditions.
The evolving gas environment places new demands on components such as bushings. These devices must now withstand higher internal pressures and maintain performance with unfamiliar gas compositions. Material compatibility, sealing integrity, and mechanical stability have become critical factors in ensuring system reliability over time.
The interface between transformers and GIS enclosures is especially important. Bushings at this junction must accommodate shifts in insulation systems and pressure tolerances. Those not designed for use in newer, environmentally focused GIS technologies may pose reliability risks.
Industry stakeholders, including manufacturers like Hitachi Energy, are responding by reassessing how bushings are designed and validated. The emphasis is shifting from relying on legacy specifications to adopting fit-for-purpose components tailored for emerging operational environments.
In short, as GIS design evolves, so must the components that support it. Careful selection of bushings suited to modern standards and insulation technologies is essential for long-term system performance.
Source: Hitachi Energy
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