Secondary switchgear

primarythree-phasesingle-phase

Overview
Siemens Energy offers a portfolio of substation technologies for transmission and distribution systems, including high-voltage grid hubs, modular prefabricated systems, mobile substations and compact micro substations. The Blue portfolio provides SF6-free insulation (clean air) to eliminate F-gases. Digital capabilities such as the Noedra Node suite and the Pretact® resilience concept support monitoring, protection and rapid deployment.

Key offerings

• Air-insulated switchgear (AIS)
• Gas-insulated switchgear (GIS)
• Hybrid substations (AIS + GIS)
• Offshore substations (floating/harsh environments)
• Prefabricated power solutions (E-houses, trailers, skids)
• Mobile substation as a service (modular, on-demand)
• Micro substations (compact, transportable, single- or three-phase)
• Digital substation solutions (Noedra Node suite)
• Pretact® resilience concept (rapid deployment modules)

Benefits and features
Siemens Energy substations combine proven high-voltage equipment with digitalization, asset health analytics and cybersecurity. Product attributes include modular design for fast installation, SF6-free options (Blue portfolio), low-noise and low-electromagnetic emission variants for urban sites, and configurations optimized for space-constrained or harsh environments. Offerings are available as asset-as-a-service for rapid restoration and flexible grid support.

Applications / Typical use cases

• Power transmission and distribution (bulk grid connections, load centers)
• Urban power delivery in constrained footprints
• Offshore grid connections for wind farms and marine applications
• Emergency restoration, bypass and temporary grid connections
• Rural electrification and remote/off-grid communities
• Capacity expansions, modernization and digital retrofits
• E-mobility and EV charging integration via micro substations

Technical specifications

• AIS: voltage capability up to 1100 kV; suitable for transmission and distribution applications.
• GIS: voltage range 72.5 kV to 550 kV; compact footprint, low noise and low electromagnetic emissions.
• Hybrid substations: combine GIS and AIS technologies; modular; up to 550 kV.
• Offshore substations: designs for floating and harsh marine environments, optimized for reliable grid connection offshore.
• Prefabricated solutions: plug-and-play E-houses, trailers, skids; applications up to ~420 kV for rapid on-site installation.
• Mobile substations as a service: modular deployable assets; typical capability up to ~420 kV for emergency and temporary use.
• Micro substations: compact transportable designs; single- or three-phase options; configurations range to meet local HV-to-LV step-down needs.
• Digitalization: Noedra Node integrates sensing, inspection, predictive analytics, protection and automation.
• Pretact®: modular/prefabricated systems engineered for rapid deployment and recovery.
• Environmental: Blue portfolio offers SF6-free (clean air) insulation to eliminate F-gases and reduce GWP.