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IEEE C37.20.1-1987

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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New IEEE Standard - Superseded. Low-voltage metal-enclosed switchgear, which can contain 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 can be 254 V, 508 V, or 635 Vac and 300/325 V, 800 V, 1000 V, 1600 V, or 3200 Vdc. The continuous current ratings of the main bus in ac designs can be 1600 Al 2000 A, 2500 A, 4000 A, 6000 A, 8000 A, 10,000 A, or 12,000 A. The switchgear can 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.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C37.20.1
Publication Date June 29, 1987
Language en - English
Page Count 36
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