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EN 61857-22:2008

Current

Current

The latest, up-to-date edition.

Electrical insulation systems - Procedures for thermal evaluation - Part 22: Specific requirements for encapsulated-coil model - Wire-wound electrical insulation system (EIS)

Published date

08-10-2008

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Construction
  4.1 General information
  4.2 ECM components
  4.3 Assembly of the ECM
  4.4 Similarity of reference and candidate ECM
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
Annex A (informative) Similarity of reference and
        candidate specimens
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

IEC 61857-22:2008 provides a general-purpose procedure for the evaluation of wire-wound systems using a general purpose encapsulated-coil model (ECM) where the application is unknown. This second edition cancels and replaces the first edition published in 2002, and constitutes editorial revisions to make this standard compatible with Parts 1 and 21.

Committee
CLC/SR 112
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Current

BS EN 61857-31:2017 Electrical insulation systems. Procedures for thermal evaluation Applications with a designed life of 5 000 h or less
CEI EN 61857-31 : 1ED 2017 ELECTRICAL INSULATION SYSTEMS - PROCEDURES FOR THERMAL EVALUATION - PART 31: APPLICATIONS WITH A DESIGNED LIFE OF 5000 H OR LESS
I.S. EN 61857-31:2017 ELECTRICAL INSULATION SYSTEMS - PROCEDURES FOR THERMAL EVALUATION - PART 31: APPLICATIONS WITH A DESIGNED LIFE OF 5000 H OR LESS
EN 61857-31:2017 Electrical insulation systems - Procedures for thermal evaluation - Part 31: Applications with a designed life of 5 000 h or less

IEC 60050-195:1998 International Electrotechnical Vocabulary (IEV) - Part 195: Earthing and protection against electric shock
IEC 61857-1:2008 Electrical insulation systems - Procedures for thermal evaluation - Part 1: General requirements - Low-voltage
EN 61857-1:2009 Electrical insulation systems - Procedures for thermal evaluation - Part 1: General requirements - Low-voltage

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