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IEEE C37.20.1-2002

Historical Revision

IEEE Standard for Metal-Enclosed Low-Voltage (1000 Vac and below, 3200 Vdc and below) Power Circuit Breaker Switchgear

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Revision Standard - Superseded. 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.
This project will provide a revision of the current C37.20.1 Standard. The current revision was issued in 1993 and reaffirmed in 1998. The equipment covered by this Standard has been and continues to be a vital element of industrial, commercial, institutional and utility electrical distribution systems.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C37.20.1
Publication Date Oct. 9, 2002
Language en - English
Page Count 55
Revision Level
Supercedes
Committee Switchgear
Publish Date Document Id Type View
July 13, 2015 C37.20.1-2015 Revision
Oct. 9, 2002 C37.20.1-2002 Revision
May 5, 1994 C37.20.1-1993 Revision
June 29, 1987 C37.20.1-1987 Revision