Standard icon


C37.20.1-2002 - IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear

Description: 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 254 V, 508 V, or 635 V (ac) and 300/325 V, 800 V, 1000 V, 1200 V, 1600 V, or 3200 V (dc). The preferred continuous current ratings of the main bus in ac designs are 1600 A, 2000 A, 3000 A, 3200 A, 4000 A, or 5000 A. For dc designs, the preferred ratings are 1600 A, 2000 A, 2500 A, 3000 A, 4000 A, 5000 A, 6000 A, 8000 A, 10 000 A, or 12 000 A. 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.
  • Status: Superseded Standard Help

Get This Standard

Buy Purchase a copy of this standard Buy External Link
Buy VuSpec CD ROM This standard can be purchased as part of the following VuSpect CDs:
- IEEE Power Switchgear, Circuits & Fuses Standards Collection Buy
- IEEE Power Switchgear, Substations & Relays Standards Collection Buy
Access with Subscription External Link Standards Online subscribers can access this standard in IEEE Xplore Digital Library. Access Learn More