IEEE C37.21-2017

$37.38

IEEE Standard for Control Switchboards

Published By	Publication Date	Number of Pages
IEEE	2017	34

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Description

Revision Standard – Active. 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.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.21™-2017 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
7	Participants
8	Introduction
10	Contents
11	1. Overview 1.1 Scope 1.2 Types of switchboards 2. Normative references
13	3. Definitions
14	4. Usual service conditions
15	5. Ratings 5.1 Control power voltage and frequency ratings 5.2 Temperature limitations for air surrounding devices within an enclosed switchboard
16	6. Tests 6.1 General 6.2 Design tests
17	6.3 Production tests
18	6.4 Field dielectric test 7. Construction 7.1 General requirements
23	7.2 Materials and finish
24	7.3 Indoor switchboards 7.4 Outdoor switchboards
26	Annex A (informative) Bibliography
28	Annex B (informative) General application guide B.1 Unusual service conditions
30	B.2 Nuclear power plant application
31	Annex C (informative) Handling, storage, and installation guide C.1 General C.2 Handling
32	C.3 Pre-operation check
34	Back cover