LEADER 02069nam 2200361 450 001 9910224368203321 005 20231214071717.0 010 $a1-5044-4467-1 035 $a(CKB)4100000000685723 035 $a(NjHacI)994100000000685723 035 $a(EXLCZ)994100000000685723 100 $a20231214d2017 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aIEEE Std C37.21-2017 (Revision of IEEE Std C37.21-2005) - Redline: $eIEEE Standard for Control Switchboards /$fIEEE 210 1$aNew York, USA :$cIEEE,$d2017. 215 $a1 online resource (55 pages) 330 $aRatings, construction, and testing of dead-front control switchboards containing, but not limited to, devices such as switches, control devices, instrumentation, metering, monitoring, alarms, annunciators, protective and auxiliary relays, and regulating devices and accessories are covered in this standard. It includes, but is not specifically limited to, switchboards for the control and protection of apparatus used for or associated with power generation, conversion, transmission, and distribution. Types of switchboards may include control, vertical, dead-front, enclosed, dual, or duplex switchboards. Other construction types include control desks, consoles, benchboards, dual or duplex benchboards, fixed rack, cabinet, and swing rack cabinets. It does not apply to industrial controls, communication equipment, switchboards for use on board ships, or Class 1E switchboards for use in nuclear generating stations. 517 $aIEEE Std C37.21-2017 606 $aElectric switchgear$xStandards 606 $aElectrical engineering$xStandards 615 0$aElectric switchgear$xStandards. 615 0$aElectrical engineering$xStandards. 676 $a621.3173 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a9910224368203321 996 $aIEEE Std C37.21-2017 (Revision of IEEE Std C37.21-2005) - Redline$93647391 997 $aUNINA