NBN EN 61857-21 : 2009
Current
The latest, up-to-date edition.
ELECTRICAL INSULATION SYSTEMS - PROCEDURES FOR THERMAL EVALUATION - PART 21: SPECIFIC REQUIREMENTS FOR GENERAL-PURPOSE MODELS - WIRE-WOUND APPLICATIONS
12-01-2013
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
Specifies a general-purpose model (GPM) and a tall channel alternative model (GPM-TC) which can be used for the evaluation of wire-wound EIS where specific electrotechnical products are not available or required.
| DevelopmentNote |
Supersedes NBN EN 61857-23. (11/2005)
|
| DocumentType |
Standard
|
| PublisherName |
Belgian Standards
|
| Status |
Current
|
| Standards | Relationship |
| SN EN 61857-21 : 1999 | Identical |
| UNE-EN 61857-21:2009 | Identical |
| EN 61857-21:2009 | Identical |
| I.S. EN 61857-21:2009 | Identical |
| BS EN 61857-21:2009 | Identical |
| DIN EN 61857-21 : 2010 | Identical |
| NF EN 61857-21 : 2009 | Identical |
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