NBN EN 61857-23 : 2003

Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Construction
  4.1 General information
  4.2 GPM-TC components
  4.3 Assembly of the GPM-TC
5 Number of test objects
6 Test procedures
  6.1 General
  6.2 Initial screening tests
      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 Analyzing, reporting and classification
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Figure
Tables

Gives a general-purpose, tall-channel model (GPM-TC) which can be used for the evaluation of wire-wound electrical insulation systems (EIS) where the general-purpose model (GPM) defined in IEC 61857-21 does not offer sufficient space for the electrical insulating materials (EIM) and/or winding wire to be evaluated.