01995nam 2200349 450 991013576070332120231206190612.00-7381-4275-110.1109/IEEESTD.1987.79651(CKB)3780000000089262(NjHacI)993780000000089262(EXLCZ)99378000000008926220231206d1987 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierANSI/IEEE Std C37.20.1-1987 IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker Switchgear /Institute of Electrical and Electronics EngineersPiscataway, NJ :IEEE,1987.1 online resourceLow-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.ANSI/IEEE Std C37.20.1-1987: IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker SwitchgearElectric circuit-breakersElectric circuit-breakers.621.317NjHacINjHaclDOCUMENT9910135760703321ANSI2072434UNINA