LEADER 01995nam 2200349 450 001 9910135760703321 005 20231206190612.0 010 $a0-7381-4275-1 024 7 $a10.1109/IEEESTD.1987.79651 035 $a(CKB)3780000000089262 035 $a(NjHacI)993780000000089262 035 $a(EXLCZ)993780000000089262 100 $a20231206d1987 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aANSI/IEEE Std C37.20.1-1987 $eIEEE Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker Switchgear /$fInstitute of Electrical and Electronics Engineers 210 1$aPiscataway, NJ :$cIEEE,$d1987. 215 $a1 online resource 330 $aLow-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. 517 $aANSI/IEEE Std C37.20.1-1987: IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker Switchgear 606 $aElectric circuit-breakers 615 0$aElectric circuit-breakers. 676 $a621.317 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a9910135760703321 996 $aANSI$92072434 997 $aUNINA