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Medium-voltage switchgear

5-15 kV Medium-voltage metal-enclosed switch over breaker combination

Eaton’s Metal-enclosed switch and breaker (MSB) provides safe, reliable switching and fault protection for medium voltage switchgear applications. Combining a visible load-break disconnect switch with the capabilities of a fixed-mounted vacuum circuit breaker and control devices, the 5/15kV switchgear increases system protection and improves coordination with upstream and downstream devices. 

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VOLTAGE CLASS
up to 15 kV
CONTINUOUS CURRENT
up to 2000 A
INTERRUPT RATING
up to 40 kAIC

Core features

  • Metal-Enclosed switchgear accommodates voltages from 1kV to 15kV, up to 1200A continuous current, and up to 40kA short circuit withstand

  • Designed for deployment in new and retrofit substation installations

  • Can be used as the primary main device integrated with fused feeder switches, or as primary protection in single-ended substations

  • Indoor and outdoor configurations available 

  • Type MEB vacuum switchgear meets or exceeds the following industry standards: ANSI/IEEE C37.20.3. ANSI/IEEE C37.20.4, ANSI C37.22, ANSI C37.57, ANSI C37.58, NEMA SG5, NEMA SG6, CSA 22.2 No. 31. CSA listed for Canada and U.S. markets.

View design guide (layouts, technical data and application information)

Download guide spec (26 13 13 23)

Learn more about power system design basics

Image gallery

View images of 5-15 kV medium-voltage metal-enclosed switch and breaker.

MSB breaker control device wiring
MSB outdoor rated control and viewing window doors open
MSB front access view of the switch mechanism
MSB switch operation being tested
MSB rear view of bus for switch over breaker

Want to learn more?

Ohmic voltage sensing (OVS) increases reliability over traditional core and coil voltage transformers. Watch this brief video for an overview of the benefits of including an OVS system to protect against damaging transients.  

Achieve better protection and device coordination

The MSB enhances the benefits of the traditional load interrupter switch and fuse combination, replacing the fuses with a breaker. In addition to performing the operations of a metal enclosed breaker, the MSB increases system protection and improves coordination with upstream and downstream devices.

Deploy in multiple manners

The MSB switchgear can be used as the primary main device and integrated with fused feeder switches in a line-up of fused metal-enclosed switchgear. It can also function as primary protection for single-ended substations, resulting in cost savings by eliminating the need for a secondary main breaker.

Safe and flexible

Engineered for both new substations and to retrofit in existing substations, the MSB is an ideal solution for locations where arc flash safety is an issue.

Eaton’s Electrical Engineering Services and Systems

With more than 1,500 experts in 60 locations throughout Canada and the U.S., and more around the world, Eaton’s Electrical Engineering Services and Systems team is one of the largest and most experienced service organizations in the industry.
Specifications

View design guide (layouts, technical data and application information)

Download guide spec (26 13 13 23)

Learn more about power system design basics

Ratings

RATED MAXIMUM VOLTAGE 4.76 kV, 15 kV  
CONTINUOUS CURRENT 600 A to 2000 A  
INTERRUPT RATING Up to 40 kA rms symmetrical  
BASIC IMPULSE LEVEL (BIL) 4.76 kV class - 60 kV peak, 15 kV class - 95kV peak  

Standards

ANSI/IEEE STANDARD C37.20.3, C37.20.4, C37.22, C37.57, C37.58  
NEMA SG-5, SG-6  
CSA C22.2 No. 31  
THIRD PARTY APPROVAL/RECOGNITION UL, CSA available for most ratings  
SEISMIC QUALIFICATION IBC, CBC  

enclosure

ACCESS Front & rear options  
INSULATING MEDIUM Air  
BUS INSULATION Optional  
BUS SUPPORTS Glass Polyester  
ENCLOSURE TYPE Indoor & outdoor  
INDOOR SECTION DIMENSIONS (TYPICAL) 36" w x 70" d x 90.38" h  

devices

SWITCHING DEVICE Vacuum circuit breaker  
DEVICE MOUNTING Fixed  

Application data

WEIGHTS 1700 lbs  
     
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  • Aluminum - the other conductor
    This document discusses how aluminum conductors have been successfully utilized in the electrical industry for over 100 years.
    (PDF 90 KB , 01/05/2006)
  • Medium-voltage metal-enclosed switchgear catalog
    Volume 3, Tab 6 - This catalog describes application data, standards, certifications, product selection information, technical data and specifications for medium-voltage metal-enclosed switchgear.
    (PDF 599 KB , 01/03/2016)
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