These are installed at switching stations and substations at relay points for sending electricity produced at power plants to consumers (such as homes and factories).
Hitachi provides compact, reliable Gas Insulated Switchgear (GIS) with technology that can isolate 550 kV at a single point.
The switchgear is composed of isolators that open/close and cut off circuits of current, disconnectors that electrically isolate circuits and open voltage, and other components.
Gas Insulated Switchgear (GIS) is the name for a unit that houses these components and circuits in a single gas tank with a compact footprint.
Grounding devices that prevent electrical shock and lightning arresters that prevent dielectric breakdowns from lightning strikes are also included to enhance safety.
Hitachi also offers expertise in the form of a full lineup of products that supports UHV (ultra-high voltage), from 100 kV up to 1,100 kV.
Hitachi took part in the world's first commercial project for a UHV pilot transmission system in China, delivering a 1,100 kV GIS (double-break).
Hitachi is working to organize and build a new global supply chain and is expanding its engineering system that is in line with the market.
