SN EN 60505 : 2000

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
   3.1 General terms
   3.2 Terms related to service stresses and ageing
   3.3 Terms related to testing
4 Ageing
   4.1 Ageing mechanism
   4.2 Assessment of ageing mechanisms
   4.3 Accelerated ageing
5 Elements for preparing an evaluation method
   5.1 Object
   5.2 Service conditions
   5.3 Life values
6 Functional evaluation methods to qualify an EIS
   6.1 General considerations
   6.2 Types of evaluation procedures
   6.3 Practical considerations
7 Functional ageing tests
   7.1 Test objects
   7.2 Test conditions
   7.3 Determination of EIS service life
8 Accelerated ageing
   8.1 Stress levels
   8.2 Duration and number of subcycles
   8.3 Ageing subcycle
9 Prediagnostic conditioning
10 Diagnostics
   10.1 Diagnostic tests - End point criteria
   10.2 Additional specific tests
11 Analysing the data
   11.1 General
   11.2 Operating experience
   11.3 Electrical endurance
   11.4 Thermal ageing
   11.5 Mechanical endurance
   11.6 Environmental test data
   11.7 Multifactor test data
   11.8 Number of specimens
12 Evaluation procedures based on statistical distributions -
   Mathematical formulae
13 Test report
14 EIS coding
Annex A (informative) Checklists
Annex B (informative) Flow charts
Annex C (informative) Selection of diagnostic tests and their
                      stress levels
Annex D (informative) Test using step-by-step increasing
                      voltage
Annex ZA (normative) Normative references to international
                      publications with their corresponding
                      European publications
Bibliography

Specifies the basis for estimating the ageing of electrical insulation systems (EIS) under conditions of either electrical, thermal, mechanical, environmental stresses or combinations of these (multifactor stresses).