EN 61857-22:2008

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.