IEC TS 61251:2008
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Electrical insulating materials - A.C. voltage endurance evaluation - Introduction
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
11-18-2015
English
05-14-2008
FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 Voltage endurance
4.1 Voltage endurance testing
4.2 Electrical stress
4.3 Voltage endurance (VE) graph
4.4 Short-time electric strength
4.5 Voltage endurance coefficient (VEC) - n
4.6 Differential VEC (n[d])
4.7 Electrical threshold stress (E[t])
4.8 Voltage endurance relationship
5 Test methods
5.1 Introductory remark
5.2 Tests at constant stress
5.2.1 Conventional VE test
5.2.2 Diagnostic measurements
5.2.3 Detection of an electrical threshold
5.3 Tests at higher frequency
5.4 Progressive stress tests
5.5 Preliminary tests to determine the initial part
of the VE line
5.6 Suggested test method
6 Evaluation of voltage endurance
6.1 Significance of the VEC
6.2 Significance of the electrical threshold stress
6.3 Dispersion of data and precision requirements
6.4 Presentation of the results
Annex A (informative) The Weibull distribution
Bibliography
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