Superseded Standard

IEEE C37.20.1-1987

IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker Switchgear

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.

Sponsor Committee
PE/SWG - Switchgear
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Status
Superseded Standard
Superseded by
C37.20.1-1993
Board Approval
1983-09-22
History
ANSI Approved:
1986-08-07
Published:
1987-06-29
Reaffirmed:
1992-06-18

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/SWG - Switchgear
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