SN EN 61857-21 : 1999
Current
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The latest, up-to-date edition.
ELECTRICAL INSULATION SYSTEMS - PROCEDURES FOR THERMAL EVALUATION - PART 21: SPECIFIC REQUIREMENTS FOR GENERAL-PURPOSE MODEL - WIRE-WOUND APPLICATIONS
Published date
01-12-2013
Publisher
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 procedures
6.1 General
6.2 Initial screening tests
6.3 Thermal endurance test
7 End-of-life criterion
8 Analyzing, reporting and classification
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