IEEE C37.20.1 2002
$72.58
IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear
| Published By | Publication Date | Number of Pages |
| IEEE | 2002 | 66 |
Revision Standard – Inactive – Superseded. Low-voltage metal-enclosed switchgear-which contains either stationary or drawout, manually or electrically operated low-voltage ac or dc power circuit breakers in individual grounded metal compartments, in three-pole, two-pole, or single-pole construction is covered. Rated maximum voltage levels are 254V, 508V, or 635V (ac) and 300/325V, 800V, 1000V, 1200V, 1600V, or 3200V (dc). The preferred continuous current ratings of the main bus in ac designs are 1600A, 2000A, 3000A, 3200A, 4000A, or 5000A. For dc designs, the preferred ratings are 1600A, 2000A, 2500A, 3000A, 4000A, 5000A, 6000A, 8000A, 10000A, or 12000A. The switchgear may also contain associated control, instruments, metering, protective, and regulating devices as necessary. The standard deals with service conditions, ratings, temperature limitations, and classification of insulating materials, insulation (dielectric) withstand voltage requirements, test procedures, and application.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear |
| 4 | Introduction |
| 6 | Participants |
| 9 | Contents |
| 12 | 1. Scope 2. References |
| 15 | 3. Definitions 3.1 General |
| 17 | 4. Service conditions 5. Ratings 5.1 General 5.2 Voltage and insulation levels |
| 18 | 5.3 Rated power frequency |
| 19 | 5.4 Rated current |
| 20 | 5.5 Temperature limitations |
| 22 | 5.6 Current transformer ratings (LV ac switchgear) |
| 23 | 5.7 Phase current transformer accuracies 5.8 Shunts for use in LV dc switchgear 6. Tests 6.1 General |
| 24 | 6.2 Design tests |
| 37 | 6.3 Production tests |
| 39 | 6.4 Conformance tests 6.5 Field dielectric tests 7. Construction 7.1 General requirements |
| 45 | 7.2 Materials and finish |
| 46 | 7.3 Barriers 7.4 Buses and connections 7.5 Access doors and covers |
| 47 | 7.6 Closing and tripping 7.7 Indoor LV switchgear 7.8 Outdoor LV switchgear |
| 48 | 7.9 Pull box 7.10 Arrangements with stationary circuit breakers 7.11 Arrangements with drawout circuit breakers |
| 50 | 7.12 Primary cable space 7.13 Precautionary labels 7.14 Lifting devices 8. Application guide for LV switchgear 8.1 Unusual service conditions |
| 53 | 8.2 System characteristics—voltage and frequency |
| 54 | 8.3 Overvoltage considerations—insulation levels 8.4 Continuous current rating and overload capability |
| 59 | 8.5 Short-circuit considerations |
| 60 | 8.6 Nuclear power plant application 8.7 Associated devices often used in LV switchgear |
| 62 | 8.8 Protection and isolation of switchgear connected to other circuit protective equipment |
| 63 | 8.9 Overcurrent protection 9. Guide for handling, storage, and installation 9.1 General 9.2 Handling |
| 65 | 9.3 Preoperation check |
| 66 | 9.4 Removable elements 9.5 Interlocks 9.6 Energizing |
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