IEEE C57.12.20 2005
$37.38
Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34500 Volts and Below; Low Voltage, 7970/13800Y Volts and Below
Published By | Publication Date | Number of Pages |
IEEE | 2005 | 48 |
Revision Standard – Inactive – Superseded. This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of single- and three-phase, 60 Hz, mineral-oil-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, high voltages 34 500 V and below and low voltages 7970/13 800Y V and below.
PDF Catalog
PDF Pages | PDF Title |
---|---|
1 | Front Cover |
3 | IEEE Standard for Overhead-Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below |
5 | Introduction |
6 | Notice to users Errata Interpretations Patents Participants |
8 | CONTENTS |
9 | IEEE Standard for Overhead-Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34 500 V and Below; Low Voltage, 7970/13 800Y V and Below 1. Overview 1.1 Scope 1.2 Purpose 2. Normative references |
10 | 3. Definitions 4. Ratings 4.1 Kilovolt-ampere ratings 4.2 Voltage ratings and tap ratings |
11 | 5. Basic lightning impulse insulation levels and dielectric tes 5.1 Basic lightning impulse 5.2 Dielectric test 6. Tests 6.1 General 6.2 Dielectric tests 7. Construction 7.1 Bushings and Terminals |
12 | 7.2 Accessory equipment |
15 | 7.3 Polarity, terminal markings, and angular displacement |
16 | 7.4 Oil preservation 7.5 Tanks |
18 | 8. Storage and installation 8.1 Storage 8.2 Installation 9. Design tests for fault current capability of overhead distri 9.1 Objective 9.2 General requirements |
19 | 9.3 Tests 9.4 Test number 1āan arcing fault in an enclosure 9.5 Test number 2āfor enclosures with internal fusible elements |
20 | 9.6 Test results |
42 | Annex A (informative) Auxiliary Mounting Devices |
48 | Annex B (informative) Bibliography |