Gas-insulated switchgear (GIS) portfolio
Complete portfolio for all applications and environments
Gas-insulated high-voltage switchgear (GIS) is a compact metal encapsulated switchgear consisting of high-voltage components such as circuit-breakers and disconnectors, which can be safely operated in confined spaces. GIS is used where space is limited, for example, extensions, in city buildings, on roofs, on offshore platforms, industrial plants and hydropower plants. Hitachi Energy has always been and continues to drive innovation in GIS technology in ratings, operations, switching technology, smart control and supervision, and compactness. As a result, Hitachi Energy's GIS offers outstanding reliability, operational safety and environmental compatibility. It provides a complete range of products for all ratings and applications from 72.5 kV to 1200 kV matching current and future requirements for modern switchgear.
Applications
- Power transmission
- Integration of renewable power generation units to the grid
- Railways
Why Hitachi Energy?
- Pioneer in GIS technology with 50 years of proven experience
- Worldwide footprint and service network
- World leader through continuous research and development (R&D)
- Provider of highly reliable, smart, compact and economic solutions to complex switchgear applications
- Monitoring, control, protection and communication features for smooth integration into digital substation systems using IEC 61850
- Suitable for areas with high seismic activities due to low center of gravity
Our offering
- GIS for 72.5 to 1200 kV
- EconiQ® products
FAQs
GIS offers a compact design, making it ideal for space-constrained environments. It provides superior reliability, reduced maintenance, and enhanced safety compared to AIS, especially in harsh climates or urban areas.
SF6-free GIS eliminates the use of greenhouse gases, reducing environmental impact and supporting global sustainability goals. These eco-efficient solutions maintain high performance while meeting strict environmental regulations.
GIS is perfect for urban substations, industrial facilities, offshore platforms, and underground installations where space is limited and environmental conditions demand robust sealed designs.
GIS systems are factory-assembled, gas-filled, and pre-tested, enabling faster installation and commissioning. Their sealed design shields internal components, extending maintenance intervals to 8-10 years, reducing downtime and significantly reducing lifecycle service demands.
Hitachi Energy offers comprehensive lifecycle services, including installation, upgrades, condition monitoring, spare parts, and digital solutions to ensure optimal performance and extended equipment life.
Our GIS portfolio covers voltage levels from 72.5 kV up to 1,200 kV, delivering reliable solutions for a wide range of transmission and distribution applications.
EconiQ GIS uses eco-efficient insulation alternatives instead of SF6, significantly lowering carbon emissions while maintaining reliability and safety standards for high-voltage applications.
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