IEEE C57.12.56 1986
$46.04
IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers
| Published By | Publication Date | Number of Pages |
| IEEE | 1986 | 22 |
New IEEE Standard – Inactive – Superseded. This IEEE Standards product is part of the C57 family on Power Distribution and Regulating Transformers. A test procedure for determining the temperature classification of ventilated dry-type power and distribution transformer insulation systems by test rather than by chemical composition is established. The intent is to provide a uniform method for providing data for selection of the temperature classification of the insulation system, for providing data that may be used as a basis for a loading guide, and for comparative evaluation of different insulation systems. Voltage-withstand endpoint criteria are related to the impulse voltage distribution within the coil or to the initial voltage-withstand of the coil. A relationship between impulse withstand of the insulation and short-term 60-Hz-withstand is identified so that 50/60–Hz testing of model coils is possible.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | Title Page |
| 3 | Introduction Participants |
| 5 | CONTENTS |
| 7 | 1. Introduction 1.1 Scope 1.2 Purpose 1.3 References |
| 8 | 1.4 Applicable Document in Preparation 2. Basic Considerations 2.1 General 2.2 Intent 2.3 Aging Factors |
| 9 | 2.4 Data Treatment 3. Test Procedures 3.1 General |
| 10 | 3.2 Test Models |
| 13 | 3.3 Screening |
| 14 | 3.4 Test Cycles 3.5 Temperature Aging |
| 15 | 3.6 Humidity Conditioning 3.7 Dielectric Tests |
| 18 | 4. Reporting |
| 19 | Annex AāMethod for Applying Thermocouples |
| 21 | Annex BāOutline for Transformer Insulation SystemsāProcedure and Test Cycles |
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