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IEEE C37.20.9-2019

IEEE C37.20.9-2019

$91.54

IEEE Standard for Metal-Enclosed Switchgear Rated 1 kV to 52 kV Incorporating Gas Insulating Systems

Published By Publication Date Number of Pages
IEEE 2019 120
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New IEEE Standard – Active. This standard covers metal-enclosed switchgear assemblies incorporating gas insulating systems containing, but not limited to, such devices as interrupter switches; selector switches; fuses; circuit breakers; control, instrumentation and metering devices; and protective equipment. It includes, but is not specifically limited to, equipment for the control and protection of apparatus used for distribution of electrical power.

PDF Catalog

PDF Pages PDF Title
1 IEEE Std C37.20.9™-2019 Front cover
2 Title page
4 Important Notices and Disclaimers Concerning IEEE Standards Documents
7 Participants
9 Introduction
12 Contents
15 IMPORTANT NOTICE
1. Scope
2. Normative references
19 3. Definitions
23 4. Normal (usual) and special (unusual) service conditions
4.1 Normal (usual) service conditions
24 4.2 Special (unusual) service conditions for both indoor and outdoor switchgear
25 5. Ratings
5.1 General
26 5.2 Rated maximum voltage (V) or (Ur)
5.3 Rated insulation level (Ud, Up)
27 5.4 Rated power frequency (fr)
5.5 Rated continuous (normal) current and temperature rise
30 5.6 Rated short-time withstand current (Ik)
5.7 Rated peak withstand current (Ip)
31 5.8 Rated duration of short-time withstand current (tk)
5.9 Rated supply voltage of closing and opening devices and of auxiliary and control circuits (Ua)
5.10 Rated supply frequency of closing and opening devices and of auxiliary circuits
5.11 Rated pressure of compressed gas for insulation and/or operation
5.12 Current transformer ratings
33 6. Design and construction
6.1 Buses, primary connections, and other components
35 6.2 Grounding
36 6.3 Control and secondary circuits and devices
40 6.4 Miscellaneous
41 6.5 Materials and finish
42 6.6 Precautionary labels
43 6.7 Barriers
6.8 Interlocks
44 6.9 Enclosure categories
6.10 Circuit breaker or switch—open/close position indication
6.11 Degrees of protection provided by enclosures
6.12 Requirements for gases in switchgear
45 6.13 Requirements for gas tightness
46 6.14 Requirements for gas compartments
6.15 Remote test cabinet
6.16 X-ray emission
47 7. Design (type) tests
7.1 General
49 7.2 Dielectric tests
55 7.3 Radio influence voltage (RIV) test
7.4 Measurement of resistance of circuits
56 7.5 Continuous current (temperature-rise) tests
59 7.6 Short-time withstand current and peak withstand current tests
61 7.7 Enclosure categories and related requirements
7.8 Tightness tests
62 7.9 Electromagnetic compatibility tests
7.10 Additional tests on auxiliary and control circuit
7.11 X-Radiation procedure for vacuum interrupters
63 7.12 Mechanical tests
64 7.13 Insulating, isolating, and sealing materials
68 7.14 Coatings qualification test
69 7.15 Weatherproofing test for outdoor MEGIS
8. Production (routine) tests
8.1 General
8.2 Dielectric test on the main circuit
70 8.3 Inspection and dielectric test on auxiliary and control circuits
8.4 Measurement of the resistance of the main circuit
71 8.5 Tightness test
8.6 Design and visual checks
8.7 Mechanical operation tests
8.8 Camera tests
9. Field dielectric tests
72 10. Application guide for MEGIS
10.1 Special (unusual) service conditions
76 10.2 System characteristics—voltage and frequency
10.3 Overvoltage considerations—insulation levels
10.4 Continuous current rating and overload capability
77 10.5 Short-circuit considerations
10.6 Nuclear power plant application
10.7 Exposed circuits
10.8 Surge arresters in switchgear assemblies
10.9 Protection and isolation of switchgear connected to other switching equipment
78 10.10 Current transformer accuracies
10.11 Replacement materials and parts
11. Guide for handling, storage, and installation (informative)
11.1 Handling
80 11.2 Preoperation check
81 11.3 Mechanical tests—leakage
11.4 Mechanical tests—gas quality (moisture, purity, and density)
82 11.5 Energization
83 Annex A (normative) Guide for enclosure categories and related requirements
A.1 Scope
A.2 Enclosure categories
84 A.3 Enclosure requirements
90 Annex B (normative) Flame-resistance tests for applied insulation (exposed to air)
B.1 Test apparatus
91 B.2 Preparation of sample
B.3 Test procedure
92 B.4 Analysis
93 Annex C (normative) Partial discharge testing
C.1 General
C.2 Test circuits and measuring systems
C.3 Calibration of measuring system and calibrators
C.4 Tests
94 C.5 Test procedure
C.6 Maximum permissible partial discharge magnitude
96 Annex D (normative) Voltage dividers
D.1 Introduction
D.2 Glossary
A.1 Construction
97 D.4 Performance
99 Annex E (normative) Conformance testing
E.1 Test and retest schedules
100 E.2 Insulating material changes
E.3 Tests for internal arcing faults (optional)
101 Annex F (normative) Evaluation of changes made in insulating materials and systems
F.1 Overview
F.2 Related standards
102 F.3 Definitions
103 F.4 Requirements for compliance
107 F.5 Tests
108 F.6 Replacement of gas
109 Annex G (normative) Identification of test specimens
G.1 Data
G.2 Drawings
111 Annex H (informative) Exposure to pollution
H.1 General
H.2 Pollution levels
H.3 Minimum requirements for MEGIS
113 Annex I (normative) Method for the weatherproofing test for outdoor switchgear
116 Annex J (informative) Partition classes for MEGIS
117 Annex K (informative) Bibliography
120 Back cover

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IEEE C37.20.9-2019
$91.54