ELECTRICAL INSULATION SYSTEMS - PROCEDURES FOR THERMAL EVALUATION - PART 21: SPECIFIC REQUIREMENTS FOR GENERAL-PURPOSE MODELS - WIRE-WOUND APPLICATIONS
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Construction
4.1 General information
4.2 Model components
4.3 Assembly of the model
5 Number of test objects
6 Test procedure
6.1 General
6.2 Initial screening test
6.2.1 General
6.2.2 Initial dielectric test
6.3 Thermal endurance test
6.3.1 Endurance test cycle
6.3.2 Thermal ageing
6.3.3 Mechanical stress
6.3.4 Thermal shock
6.3.5 Moisture exposure
6.3.6 Dielectric diagnostic test
7 End-of-life criterion
8 Analysing, reporting and classification
Bibliography
Describes a general-purpose model (GPM) and a tall channel alternative model (GPM-TC) which can be used for the evaluation of wire-wound electrical insulation systems (EIS) where specific electrotechnical products are not available or required.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 112 |
