Low-voltage metal-enclosed switchgear-which contains either stationary or drawout, manually or electrically operated low-voltage ac or dc power circuit breakers in individual grounded metal compartments, in three-pole, two-pole, or single-pole construction is covered. Rated maximum voltage levels are 254V, 508V, or 635V (ac) and 300/325V, 800V, 1000V, 1200V, 1600V, or 3200V (dc). The preferred continuous current ratings of the main bus in ac designs are 1600A, 2000A, 3000A, 3200A, 4000A, or 5000A. For dc designs, the preferred ratings are 1600A, 2000A, 2500A, 3000A, 4000A, 5000A, 6000A, 8000A, 10000A, or 12000A. The switchgear may also contain associated control, instruments, metering, protective, and regulating devices as necessary. The standard deals with service conditions, ratings, temperature limitations, and classification of insulating materials, insulation (dielectric) withstand voltage requirements, test procedures, and application.
- Sponsor Committee
- PE/SWG - Switchgear
Learn More - Status
- Superseded Standard
- PAR Approval
- 2000-06-21
- Superseded by
- C37.20.1-2015
- Superseding
- C37.20.1-1993
- Amendments
-
C37.20.1a-2005
C37.20.1b-2006
- Board Approval
- 2002-06-13
- History
-
- ANSI Approved:
- 2002-10-29
- Published:
- 2002-10-09
- Reaffirmed:
- 2007-09-27
Additional Resources
- Interpretation
- C37.20Series_interp.pdf
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More - Sponsor Committee
- PE/SWG - Switchgear
Learn More - Working Group
-
SASC-WG_C37.20.1 - SASC - IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear
Learn More - IEEE Program Manager
- Jennifer Santulli
Contact - Working Group Chair
- Ted Burse
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