IEEE PC37.20.3 2023

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IEEE Approved Draft Standard for Metal-Enclosed Interrupter Switchgear Rated Above 1 kV ac up to and Including 48.3 kV ac

Published By	Publication Date	Number of Pages
IEEE	2023	92

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Description

Revision Standard – Active – Draft. Metal-enclosed interrupter (MEI) switchgear assemblies containing, but not limited to, such devices as interrupter switches; selector switches; power fuses; circuit breakers; control, instrumentation and metering devices; and protective equipment are included in this standard. It includes, but is not specifically limited to, equipment for the control and protection of apparatus used for distribution of electrical power.

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PDF Pages	PDF Title
1	IEEE Std C37.20.3™-2023 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
9	Introduction
11	Contents
13	1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage
14	2. Normative references
16	3. Definitions, acronyms, and abbreviations 3.1 Definitions
17	4. Service conditions
18	5. Ratings 5.1 General 5.2 Voltage and insulation levels
19	5.3 Rated power frequency (fr) 5.4 Rated current
21	5.5 Temperature limitations
23	5.6 Current transformer ratings
24	5.7 Voltage transformers 5.8 Current-sensing devices other than conventional current transformers 6. Tests 6.1 General
25	6.2 Design tests
44	6.3 Production tests
45	6.4 Conformance tests 6.5 Field dielectric tests
46	6.6 Optional tests 7. Construction 7.1 Buses and primary connections
47	7.2 Grounding and bonding
48	7.3 Control and secondary circuits and devices, and all wiring
52	7.4 Miscellaneous
53	7.5 Materials, finishes, and color
54	7.6 Precautionary labels 7.7 Barriers 7.8 Shutters
55	7.9 Interlocks
56	7.10 Interchangeability of removable switching and interrupting devices 7.11 Enclosure categories
57	7.12 Switching devices open/close position indication 7.13 Voltage dividers 7.14 Ground and test devices 8. Application guide for MEI switchgear 8.1 Unusual service conditions
61	8.2 System characteristics—voltage and frequency 8.3 Overvoltage considerations—insulation levels 8.4 Continuous current rating and overload capability
68	8.5 Short-circuit considerations 8.6 Nuclear power plant application 8.7 Associated devices often used in MEI switchgear
70	8.8 Protection and isolation of switchgear connected to other circuit protective equipment 9. Guide for handling, storage, and installation 9.1 General 9.2 Handling
72	9.3 Preoperation check
73	9.4 Interrupters and removable elements 9.5 Interlocks 9.6 Energization
74	Annex A (normative) Guide for enclosure categories and related requirements A.1 Introduction A.2 Enclosure categories
75	A.3 Enclosure requirements
81	Annex B (informative) Partial discharge testing B.1 General B.2 Definitions
82	B.3 Application
83	B.4 Test procedure
85	B.5 Maximum permissible repeatedly occurring partial discharge quantity B.6 Reference material
87	Annex C (normative) Voltage dividers C.1 Introduction C.2 Definitions C.3 Construction
88	C.4 Performance
90	Annex D (informative) Bibliography
92	Back cover

Additional information

Standard Title	IEEE Approved Draft Standard for Metal-Enclosed Interrupter Switchgear Rated Above 1 kV ac up to and Including 48.3 kV ac
Published Code	IEEE
Publication Date	2023
Pages Count	92

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IEEE PC37.20.3 2023

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