Medium-voltage switchgear

Learn about how type 8DA gas-insulated switchgear can help save you project costs and improve operator safety with its reduced size and inherent arc resistance.

Economical and reliable power distribution

Be it energy supply corporations, industry or power stations, any owner or user of primary distribution systems for medium voltage places high demands on the switchgear. These include reliable technology, ease of operation, and economy. With our complete range of circuit breaker and switchgear systems for medium-voltage, Siemens sets the standards when it comes to reliable and efficient solutions for special requirements.

Watch our low- and medium-voltage switchgear videos here

Air-insulated switchgear

Air-insulated, non-arc-resistant, metal-clad, 5 kV-15 kV switchgear, type GM-SG

GM-SG air-insulated, non-arc-resistant, metal-clad, 5 kV-15 kV switchgear

  • Maximum design voltage: 4.76 kV-15 kV
  • Rated short-time withstand current: up to 63 kA
  • Rated continuous current: up to 4,000 A
  • Lightning-impulse (BIL): up to 95 kV
  • Available as indoor type GM-SG, outdoor walk-in Shelter-Clad NEMA 3R type SGM-SG, outdoor walk-in Shelter-Clad+ factory-assembled switchgear and aisle on common base with power equipment center type options type S+GM-SG, and outdoor aisleless non-walk-in OGM-SG
  • Help improve operator safety with the Siemens integrated electric-racking system (SIERS) option
  • Sm@rtGear technology for remote monitoring, configuration, and control also optionally available

Learn more about GM-SG air-insulated, non-arc-resistant, metal-clad 5-15 kV switchgear.

Air-insulated, arc-resistant, metal-clad, 5 kV-15 kV switchgear, type GM-SG-AR

GM-SG-AR air-insulated, arc-resistant, metal-clad, 5 kV-15 kV switchgear

  • Maximum design voltage: 4.76 kV-15 kV
  • Rated short-time withstand current: up to 63 kA
  • Rated continuous current: up to 4,000 A
  • Lightning-impulse (BIL): up to 95 kV

  • Arc-resistant to IEEE C37.20.7, up to 63 kA, 0.5 sec, accessibility type 2B

  • Available as indoor type GM-SG-AR, outdoor walk-in Shelter-Clad NEMA 3R type SGM-SG-AR and outdoor walk-in Shelter-Clad+ factory-assembled switchgear and aisle on common base with power equipment center type options type S+GM-SG-AR
  • Help improve operator safety with the Siemens integrated electric-racking system (SIERS) option
  • Sm@rtGear technology for remote monitoring, configuration, and control also optionally available

Learn more about GM-SG-AR air-insulated, arc-resistant, metal-clad 5-15 kV switchgear.

Air-insulated, non-arc-resistant, metal-clad, 38 kV switchgear, type GM38

GM38 air-insulated, non-arc-resistant, metal-clad, 38 kV switchgear

  • Maximum design voltage: 38 kV
  • Rated short-time withstand current: up to 40 kA
  • Rated continuous current: up to 3,000 A
  • Lightning-impulse (BIL): up to 150 kV
  • Available as indoor type GM38, outdoor walk-in Shelter-Clad NEMA 3R type SGM38, and outdoor aisleless non-walk-in OGM38
  • Help improve operator safety with the Siemens integrated electric-racking system (SIERS) option
  • Sm@rtGear technology for remote monitoring, configuration, and control also optionally available

Learn more about GM38 air-insulated, non-arc-resistant, metal-clad 38 kV switchgear.

Air-insulated, non-arc-resistant, metal-enclosed, interrupter, 5 kV-15 kV switchgear, types SIEBREAK and SIEBREAK-VCB

SIEBREAK and SIEBREAK-VCB air-insulated, non-arc-resistant, metal-enclosed, interrupter 5 kV-15 kV switchgear

  • Maximum design voltage: 5 kV-15 kV
  • Rated short-time current: up to 38 rms kA 
  • Rated continuous current: up to 1,200 A
  • Lightning-impulse (BIL): up to 95 kV
  • SIEBREAK switch types: single, duplex, or selector; SIEBREAK-VCB switch types: single or duplex 
  • For standalone bay, transformer primary, and lineup applications
  • Reduce arc-flash incident energy in low-voltage substation applications with the OMARS operation and maintenance arc-flash reduction system for SIEBREAK-VCB. 

Learn more about SIEBREAK and SIEBREAK-VCB air-insulated, non-arc-resistant, metal-enclosed interrupter 5 kV-15 kV switchgear.

Air-insulated, 5 kV-15 kV GM-SG switchgear components for panel builders

Components for panel builders of GM-SG air-insulated, non-arc-resistant, metal-clad, 5 kV-15 kV switchgear

  • Maximum design voltage: 4.76 kV-15 kV
  • Rated short-time withstand current: up to 63 kA
  • Rated continuous current: up to 4,000 A
  • Lightning-impulse (BIL): up to 95 kV

Learn more about GM-SG air-insulated, non-arc-resistant, metal-clad 5-15 kV switchgear components.

Gas-insulated switchgear

Gas-insulated, arc-resistant, up to 38 kV switchgear, types 8DA10 single bus and 8DB10 double bus

8DA10 single-bus and 8DB10 double-bus, gas-insulated, arc-resistant, up to 38 kV switchgear

  • Maximum design voltage: 15 kV-38 kV
  • Rated short-time withstand current: up to 40 kA
  • Rated continuous current: up to 3,000 A
  • Lightning-impulse (BIL): up to 200 kV

  • Arc-resistant to IEEE C37.20.7, accessibility type 2B

  • Available as indoor
  • Ideal for contaminated environments and where space is a premium being approximately 75% smaller than traditional air-insulated switchgear

Learn more about 8DA10 single-bus and 8DAB10 double-bus, gas-insulated, arc-resistant, metal-clad 5-15 kV switchgear.

Gas-insulated, arc-resistant, up to 38 kV switchgear, type 8DJH 36 single bus

8DJH 36 gas-insulated, arc-resistant, up to 38 kV switchgear

·        Maximum design voltage: up to 38 kV

·        Rated short-time withstand current: up to 25 kA

·        Rated continuous current: up to 600 A

·        Lightning-impulse (BIL): up to 170 kV

·        Available as indoor or outdoor; quick installation and no gas work at site

·        Ideal for renewable applications.

 

Learn more about 8DJH 36, gas-insulated, arc-resistant, metal-enclosed 38 kV switchgear.

Generator circuit breakers and switchgear

Medium-voltage vacuum generator circuit breaker switchgear, type HB3

HB3 medium-voltage vacuum generator circuit breaker switchgear

  • Maximum design voltage: 24 kV
  • Rated short-time withstand current: up to 100 kA
  • Rated continuous current: up to 12,500 A self-cooled
  • Interrupting ratings: 80 kA and 100 kA 

  • Tested to IEEE C37.013 standard for generator circuit breakers 

  • Up to 30 interruptions at rated short-circuit current 
  • Pair with Siemens protective relays to provide complete generator protection

Learn more about HB3 medium-voltage vacuum generator circuit breaker switchgear.

Medium-voltage, vacuum, generator circuit breakers, drawout type GMSG-GCB

Drawout GMSG-GCB medium-voltage, vacuum, generator circuit breakers

  • Maximum design voltage: 15 kV
  • Rated short-time withstand current: up to 63 kA
  • Rated continuous current: up to 4,000 A fan-cooled
  • One-high or two-high drawout construction

  • Generator circuit breakers tested to IEEE C37.013/C37.013a

  • Up to 50 full-fault interruptions
  • Front accessible circuit breaker operating mechanism for ease of maintenance

Learn more about drawout GMSG-GCB medium-voltage vacuum generator circuit breakers.

Medium-voltage, vacuum, generator circuit breakers, stationary type

Stationary, medium-voltage, vacuum, generator circuit breakers

  • Maximum design voltage: 24 kV
  • Rated short-time withstand current: up to 72 kA
  • Rated continuous current: up to 6,000 A
  • Interrupting ratings: 50 kA, 63 kA, and 72 kA 

  • Tested to IEEE C37.013 and C37.013a standard for generator circuit breakers 

  • Suitable for generators up to 200 MW
  • Up to 50 full-fault interruptions

Learn more about stationary type, medium-voltage vacuum generator circuit breakers.

Medium-voltage, vacuum, generator circuit breaker retrofit plug-and-play solutions

Tested to standard IEC/IEEE 62271-37-013 and suitable for generators up to 400 MW, GCB retrofit solutions provide a cost-effective way to upgrade from gas to current vacuum technology while increasing equipment reliability and minimizing downtime. Ideal for utilities that are close to modernization, Siemens offers Medium-Voltage Replacement Generator Circuit Breakers as replacements for leading OEM models for voltages up to 24 kV and interrupting capabilities up to 100 kA for both indoor and outdoor applications. 

 

Learn more about medium-voltage, vacuum, generator circuit breaker retrofit plug-and-play solutions. 

Legacy circuit breakers and switchgear

Air-insulated, vacuum, replacement circuit breakers 5 kV-27 kV 

Medium-voltage, vacuum, replacement circuit breakers

  • Direct vacuum replacement breakers provide a cost effective way to upgrade your system capabilities while saving you from costly maintenance and lost productivity.
  • Whether your original air-magnetic switchgear was made by Allis-Chalmers, Westinghouse, GE, Federal Pacific, ITE, McGraw Edison, or another manufacturer, we will assist you to evaluate the Siemens vacuum replacement, retrofit, or retrofill option that best meets your needs.

Learn more about air-insulated, vacuum replacement circuit breakers 5 kV-27 kV.

Improving electrical safety by design. Learn about how our products, solutions, and services can help address various challenges at your facility.
Have a technical or application question? Check out Siemens TechTopics, which is a series of papers that discuss issues of interest to users or specifiers of electrical equipment. Learn more.

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Intelligent devices have existed for more than 30 years. These devices are self-monitoring, configurable, and communicating, but individually they are only islands of intelligence.