Gas-insulated DC Switchgear (DC GIS)

Thanks to their outstandingly compact dimensions, Siemens Energy DC GIS make it much easier to build a switchyard exactly where it is required when space is limited. At the same time, they help curtail costs when land prices are at a premium. 

Siemens Energy GIS operate safely and reliably even under severe climatic conditions, which means that a gas-insulated substation doesn’t require an extra housing in most cases. The comprehensive range of standardized modules available helps implement even complex arrangements and switchyard layouts without much interface engineering, while commissioning of the GIS switchgear is fast and cost-efficient.

Siemens Energy DC GIS can be installed underground. This helps keep the visual impact of a transition station to an absolute minimum and reliably prevents unauthorized access. 
 

Numerous standardized modules are available to enable the flexible implementation even of complex arrangements with next to no interface engineering for the connection of other equipment, such as control and protection devices. 
 

Siemens Energy DC GIS are type-tested according to applicable IEC standards and CIGRE recommendations and are available for rated voltages of up to ±550 kV. This makes them suited for many new HVDC applications, such as multi-terminal or DC grid systems.

Gas-insulated lines (GIL) can be used in HVDC transmission systems. In certain cases, for example, when restrictions due to natural barriers or existing infrastructure must be crossed with challenging routing and minimal use of space.
 

In such cases, a preassembled and pretested, containerized transition solution based on Siemens Energy DC GIS for rated voltages of up to ±550 kV is the most space-saving, quick, and cost-efficient solution. It also helps reduce space requirements, engineering effort, and visual impact.