02069nam 2200361 450 991022436820332120231214071717.01-5044-4467-1(CKB)4100000000685723(NjHacI)994100000000685723(EXLCZ)99410000000068572320231214d2017 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierIEEE Std C37.21-2017 (Revision of IEEE Std C37.21-2005) - Redline: IEEE Standard for Control Switchboards /IEEENew York, USA :IEEE,2017.1 online resource (55 pages)Ratings, 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.IEEE Std C37.21-2017 Electric switchgearStandardsElectrical engineeringStandardsElectric switchgearStandards.Electrical engineeringStandards.621.3173NjHacINjHaclDOCUMENT9910224368203321IEEE Std C37.21-2017 (Revision of IEEE Std C37.21-2005) - Redline3647391UNINA