IEC 61857-23:2002

FOREWORD
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
Figure 1 - Manufacturing drawing of a test object frame
Table 1 - Initial dielectric tests for GPM-TC
Table 2 - Dielectric diagnostic tests for GPM-TC

Specifies 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.