Three-phase switchgear

AChigh-voltagemedium-voltage

Overview
Substations ensure safe and efficient power flow from generation to consumption and enable integration of renewables and grid modernization. Siemens Energy provides a comprehensive portfolio of substation technologies to support transmission system operators (TSOs) and distribution system operators (DSOs) with reliable, efficient, and sustainable power distribution solutions.

Offered solutions

• Air-insulated switchgear (AIS)
• Gas-insulated switchgear (GIS)
• Hybrid substations (combining GIS and AIS)
• Offshore substations
• Prefabricated power solutions (plug-and-play, E-houses, trailers, skids)
• Mobile substations (including mobile substation as-a-service)
• Micro substations (compact, transportable, available as-a-service)
• Blue portfolio: SF6-free, clean-air insulation solutions with zero F-gases and reduced environmental impact

Substation with air-insulated switchgear (AIS)

• Key characteristics: Cost-efficient, highly reliable, low maintenance, suitable for non-restrictive environments, easy implementation
• Typical use cases: Power transmission and distribution, load centers
• Voltage range: Up to 1100 kV

Substation with gas-insulated switchgear (GIS)

• Key characteristics: Ideal for urban areas, small footprint, reliable, low noise and low electromagnetic emissions
• Typical use cases: Urban power delivery, challenging environments, power transmission and distribution
• Voltage range: From 72.5 kV to 550 kV (indoor and outdoor applications)

Substation with hybrid solutions

• Key characteristics: Combines GIS and AIS technology, compact and modular design, suitable for space-limited environments
• Typical use cases: Power transmission and distribution, load centers, extensions of AIS
• Voltage range: Up to 550 kV

Offshore substation

• Key characteristics: Floating substation concepts for reliable grid connection
• Typical use cases: Optimized for harsh environments and minimal environmental impact (offshore wind and similar)

Prefabricated power solutions (plug-and-play)

• Key characteristics: Fast installation, safe and reliable grid connection, modular and optimized on-site installation
• Typical use cases: Emergencies, bypass, demanding environments requiring rapid deployment
• Voltage range: Up to 420 kV (examples include E-house solutions and skid/trailer-mounted substations)

Mobile substation as a service

• Key characteristics: Mobile, modular, fast installation, enables grid resilience and rapid restoration
• Typical use cases: Rural electrification, construction sites, emergencies, fast recovery, bypass operations
• Voltage range: Up to 420 kV

Micro substation (also available as a service)

• Key characteristics: Compact and tailored design, fast installation, transportable, optional as-a-service models
• Typical use cases: Rural electrification projects, remote industrial sites, off-grid communities, EV charging supplied directly from high-voltage transmission
• Voltage range: From 72.5 kV to 550 kV

Pretact resilience and prefabricated power systems
Prefabricated, modular power systems (Pretact resilience concept) deliver plug-and-play substations on trailer, skid, or HV E-house for fast deployment, mobility and reliable grid connection in diverse environments.

Digitalization
Substation solutions integrate automation, asset health analytics and cybersecurity. The Noedra Node suite unifies sensing, inspection, predictive analytics, protection and automation to transform substations into intelligent, self-aware systems that continuously assess condition and enable proactive operational decisions.

Services & maintenance
End-to-end services include engineering, project management, installation and commissioning, modernization and upgrade solutions, repairs and maintenance, spare parts, digital services and financing or asset-as-a-service models to ensure long-term reliability and performance.

Experience & impact

• Years of experience: 105
• Many countries worldwide: 100+
• Projects in total: 8,000+
• Continents impacted: 5

Caractéristiques / spécifications techniques

• Voltage ranges (examples): 72.5 kV up to 1100 kV depending on technology and application
• Technologies: AIS, GIS, hybrid (GIS + AIS), SF6-free (clean-air) Blue portfolio
• Designs: Modular, prefabricated E-house, trailer/skid-mounted, mobile substations, micro substations
• Typical application environments: Urban, rural, offshore, harsh/remote sites, load centers, renewable integration points
• Capabilities: Protection and control systems, condition monitoring, asset health analytics, cybersecurity and digital integration (Noedra Node)
• Service models: Supply, installation, commissioning, modernization, maintenance, mobile/substation-as-a-service, prefabricated plug-and-play delivery