Medium-voltage outdoor systems

Maximum reliability and availability in medium-voltage overhead distribution lines and substations up to 52 kV

Outdoor switching devices are essential components of medium-voltage outdoor distribution grid. Siemens’ comprehensive portfolio of outdoor vacuum switching devices has been especially designed for a wide variety of applications and climatic conditions. Thus, type-tested reliability as well as long electrical life and mechanical robustness minimize operation cost of medium-voltage grids. Outdoor switching devices offer the greatest possible benefit for every application, from the optimization of less developed network environments to the use in future-oriented smart grids.

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Live-Tank Outdoor Vacuum Circuit Breaker 3AF

The space saver – Reliability in all climatic conditions

  • Arc-resistant circuit-breaker for distribution grids
  • High reliable and safe operation
  • Rated voltage 12 to 40.5 kV
  • Live-Tank OVCB 3AF0 for transformer substations and distribution grids
  • Live-Tank OVCB 3AF04/3AF05 for railway distribution networks

Dead-Tank Outdoor Vacuum Circuit Breaker

Compact design, small footprint

  • Arc-resistant outdoor circuit-breaker for distribution grids
  • Designed and certified for the ANSI market 
  • 10,000 operating cycles 
  • Rated voltage 15.5 to 38 kV

Vacuum Recloser 3AD1/3

The allrounder – Safety for overhead lines and transformer substations

  • Used in overhead lines and in substations
  • Rated voltage up to 38 kV
  • Uniform design for all applications
  • Bases on more than 40 years of experience
  • Latest technology in vacuum switching and electronic control

Fusesaver 3AD8

The world's fastest OVCB – Saving costs with maximum grid availability

  • Improves reliability and SAIDI / SAIFI (System Average Interruption Duration / Frequency Index)
  • Low operating costs
  • Reduced maintenance requirements
  • Typical return on investment (ROI) in less than two years
  • Rated voltage 15.5 to 27 kV

Portable Switch

Fast, safe, cost-efficient

  • Portable soft ganged switch for distribution networks
  • Temporary isolation made easy 
  • Simple installation and independent operation
  • Riskless and fast maintenance
  • Minimized loss of customer minutes

Disconnect Switches

Safety and reliability for ease of maintenance

  • Quick detection of the line’s switching state
  • Simplified maintenance
  • Flexible mounting options
  • Rated voltage values between 15 - 69 kV

Maximized reliability and minimized operating costs

Outdoor switching devices are essential components of medium-voltage distribution grids with overhead distribution lines. Read more about all advantages in our portfolio brochure.

Intelligent Solutions

Power distribution grids in transition

Power distribution grids are becoming more and more complex. This is why Siemens focuses on helping customers improve the reliability and efficiency of their distribution grids. This keeps them a step ahead of their challenges, from the control center via the grid to the consumer. Outdoor switching devices from Siemens work in a particularly reliable and safe manner. Siemens has consistently developed this technology for high reliability and availability – for all climate conditions.

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Referenzen Outdoor Systems


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Here you will find important information, documents, and addresses relating to medium-voltage outdoor systems.

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Ready for future smart grids

Siemens’ outdoor switching devices for medium-voltage power distribution allow you to reliably and efficiently master the challenges of tomorrow’s smart grids. You’ll benefit from tested and certified systems and flexible all-in-one solutions. We will be happy to advise you in all aspects – from the control center via the grid to the consumer. The circuit-breaker research and development center in Berlin, Germany, and the Siemens Centers of Competence worldwide are part of a global R&D network, underscoring the emphasis Siemens places on the reliability of its products. Here, circuit-breaker operators and interrupters are designed, developed, and tested, while design (type) short-circuit tests are performed at independent power test laboratories.

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