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IEEE C37.21-2005

IEEE Standard for Control Switchboards

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IEEE C37.21-2005

IEEE Standard for Control Switchboards

PUBLISH DATE 2010

PAGES 34

IEEE C37.21-2005

Document Information

Revision Standard - Superseded. This standard covers 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. 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.

This standard covers ratings, construction, and testing of dead-front control switchboards containing but not limited to devices such as switches, control devices, instrumentation, metering, monitoring, protective and auxiliary relays, and regulating devices and accessories.

This project will modify all dimensional information to provide metric dimensions. This is necessary to gain global acceptance of this standard. Also, due to changes in related standards (e.g. C37.20.1 and C37.20.2) revisions will be made to provide similar requirements between these related standards.


SDO	IEEE: Institute of Electrical and Electronics Engineers
Document Number	C37.21
Publication Date	Dec. 8, 2010
Language	en - English
Page Count	34
Revision Level
Supercedes
Committee	Switchgear

Publish Date	Document Id	Type
May 23, 2017	C37.21-2017	Revision
Dec. 8, 2010	C37.21-2005	Revision
June 25, 1998	C37.21-1985	Revision

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IEEE C37.21-2005

IEEE Standard for Control Switchboards

IEEE C37.21-2005

Document Information

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