IEEE C57.96 1999
$59.04
IEEE Guide for Loading Dry-Type Distribution and Power Transformers
| Published By | Publication Date | Number of Pages |
| IEEE | 1999 | 48 |
Revision Standard – Inactive – Superseded. Reaffirmed 2004. General recommendations for the loading of dry-type distribution and power transformers that have 80 C, 115 C, and 150 C average winding rises and insulation systems limited to 150 C, 180 C, and 220 C maximum hottest-spot operating temperatures, respectively, are covered in this guide. Recommendations for ventilated, nonventilated, and sealed dry-type transformers having impregnated insulation systems are included.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | Title Page |
| 3 | Introduction |
| 4 | Participants |
| 6 | CONTENTS |
| 7 | 1. Overview 1.1 Scope 1.2 General information |
| 8 | 1.3 Transformer life expectancy 1.4 Transformer rated output 1.5 Aging of insulation |
| 9 | 1.6 Ambient temperature 1.7 Influence of ambient temperature 1.8 Influence of altitude on loading |
| 11 | 2. References 3. Basic loading conditions for normal life expectancy 3.1 Basic conditions |
| 12 | 3.2 Loading for life expectancy under specified conditions 3.3 Loading determined by measured temperature 3.4 Loading on the basis of short-time loads 3.5 Effects of various factors existing at one time |
| 16 | 4. Loading transformers with moderate sacrifice of life expectancy 4.1 Factors affecting transformer life 4.2 Aging of insulation due to operation above rated hottest-spot temperature |
| 19 | 4.3 Constant loads and life expectancy estimated by measured temperature |
| 20 | 4.4 Constant loads and life expectancy estimated by calculated temperatures 4.5 Short-time loading and life expectancy determined by measured temperatures |
| 23 | 4.6 Short-time loading and life expectancy estimated by calculated temperatures |
| 24 | 5. Supplemental cooling of existing self-cooled transformers 6. Basis for calculations of temperatures, loss of life, and loads 6.1 Method for converting actual load cycle to equivalent constant load |
| 25 | 6.2 Equations for calculation of temperature, load, and loss of life |
| 28 | 6.3 Transient computer program |
| 31 | 7. Protective devices—thermal relays |
| 32 | Annex A—Power transformers with solid-cast and/or resin-encapsulated epoxy windings |
| 48 | Annex B—Bibliography |
