IEEE C37.20.2-2022
$60.67
IEEE Standard for Metal-Clad Switchgear (Published)
| Published By | Publication Date | Number of Pages |
| IEEE | 2022 | 94 |
Revision Standard – Active. Metal-clad (MC) medium-voltage switchgear that contains drawout electrically operated circuit breakers is covered. MC switchgear is compartmentalized to isolate components such as instrumentation, main bus, and both incoming and outgoing connections with grounded metal barriers. Ranges from 4.76 kV to 48.3 kV with main bus continuous current ratings of 1200 A, 2000 A, 3000 A, and 4000 A are the rated maximum voltage levels for metal-clad switchgear . Associated control, instruments, metering, relaying, protective, and regulating devices, as necessary, are also contained by MC switchgear. Service conditions, ratings, temperature limitations and classification of insulating materials, insulation (dielectric) withstand voltage requirements, test procedures, and applications are discussed.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C37.20.2™-2022 Front Cover |
| 2 | Title page |
| 4 | Important Notices and Disclaimers Concerning IEEE Standards Documents |
| 7 | 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 |
| 18 | 4. Service conditions |
| 19 | 5. Ratings 5.1 General |
| 20 | 5.2 Voltage and insulation levels |
| 21 | 5.3 Rated power frequency 5.4 Rated current |
| 22 | 5.5 Temperature limitations |
| 24 | 5.6 Current transformer ratings 5.7 Current transformer accuracies |
| 25 | 5.8 Voltage transformers 5.9 Other devices 6. Tests 6.1 General |
| 26 | 6.2 Design tests |
| 45 | 6.3 Production tests |
| 46 | 6.4 Field dielectric tests |
| 47 | 6.5 Optional tests 7. Construction 7.1 Buses and primary connections |
| 48 | 7.2 Grounding and bonding 7.3 Control and secondary circuits and devices |
| 53 | 7.4 Miscellaneous |
| 54 | 7.5 Materials, finishes, and color |
| 55 | 7.6 Precautionary labels 7.7 Metallic barriers |
| 56 | 7.8 Shutters 7.9 Insulating materials for covering buses and connections |
| 57 | 7.10 Interlocks 7.11 Interchangeability of removable switching and interrupting devices 7.12 Primary fuses and transformers |
| 58 | 7.13 Secondary disconnect devices 7.14 Control wiring 7.15 Handling device 7.16 Test cabinet |
| 59 | 7.17 Indoor MC switchgear, access, and ventilation 7.18 Outdoor MC switchgear, access, and ventilation 7.19 Circuit breaker open/close position indication 7.20 Enclosure categories 7.21 Ground and test devices |
| 60 | 7.22 Load interrupter switches 7.23 Voltage dividers 8. Application guide for MC switchgear 8.1 Unusual service conditions |
| 63 | 8.2 System characteristics—voltage and frequency |
| 64 | 8.3 Overvoltage considerations—insulation levels 8.4 Continuous current rating and overload capability |
| 70 | 8.5 Short-circuit considerations |
| 71 | 8.6 Nuclear power plant application 8.7 Associated devices often used in MC switchgear |
| 72 | 8.8 Protection and isolation of switchgear connected to other circuit protective equipment |
| 73 | 9. Guide for handling, storage, and installation 9.1 General 9.2 Handling |
| 75 | 9.3 Preoperation check 9.4 Removable elements 9.5 Interlocks |
| 76 | 9.6 Energizing |
| 77 | Annex A (informative) Bibliography |
| 79 | Annex B (normative) Guide for enclosure categories and related requirements B.2.1 Category A enclosures B.2.2 Category B enclosures |
| 80 | B.2.3 Category C enclosures |
| 81 | B.3.1 Equivalent construction B.3.2 Access doors and covers |
| 82 | B.3.3 Enclosure and ventilation openings |
| 83 | B.3.4 Operating handle protection B.3.5 Operating handles B.3.6 Viewing panes B.3.7 Accessories |
| 84 | B.3.8 Outdoor enclosure requirements B.3.9 Exposed live parts B.3.10 Exposed fasteners B.3.11 External marking |
| 85 | Annex C (informative) Partial discharge testing |
| 87 | C.4.1 General C.4.2 Test setup |
| 88 | C.4.3 Calibration C.4.4 Test procedure |
| 91 | Annex D (normative) Voltage dividers |
| 92 | D.4.1 Dielectric withstand test |
| 93 | D.4.2 Voltage divider specific test D.4.3 Voltage dividers used as bus supports or braces |
| 94 | Back Cover |
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