IEC 61858:2008
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Electrical insulation systems - Thermal evaluation of modifications to an established wire-wound EIS
Hardcopy , PDF
English - French
25-07-2008
12-02-2014
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General considerations
5 Evaluation of the change of thickness of an EIM
5.1 Samples
5.2 Acceptance
6 Substitution of winding wire
6.1 General
6.2 Substitution of enamel
6.3 Substitution of conductor material
6.4 Alternate winding wire
7 Substitution of impregnating resin/varnish
7.1 Thermal class determination
7.2 Evaluation
7.2.1 Thermal classes equal or better
7.2.2 One thermal class lower
7.2.3 Other criteria
8 Substitution with other EIM
8.1 Technically equivalent materials
8.2 Previous evaluation
8.3 Other
9 Evaluation of additions
9.1 Addition of an impregnating resin/varnish
9.2 Addition of other components
10 Single-point thermal ageing test
10.1 Test objects
10.2 Establishing the EIS relative thermal endurance
index (EIS RTE)
10.3 Interpretation of results
Annex A (normative) Classes of winding wire
Annex B (normative) Compatibility test procedure
Bibliography
IEC 61858:2008 lists the required test procedures for qualification of modifications of an established electrical insulation system (EIS) with respect to its thermal classification. This standard is applicable to EIS used in wire-wound electrotechnical devices. The test procedures are comparative in that the performance of a candidate EIS is compared to that of a reference EIS, which has proven service experience in accordance with IEC 60505 or has been evaluated by one of the procedures given in the IEC 61857 series.This third edition cancels and replaces the second edition, published in 2004 by IEC TC 98: Electrical insulation systems (EIS). It constitutes an editorial revision.
| Committee |
TC 112
|
| DevelopmentNote |
Stability Date: 2014. (11/2012)
|
| DocumentType |
Standard
|
| Pages |
37
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| NEN EN IEC 61858 : 2008 | Identical |
| PN EN 61858 : 2008 | Identical |
| VDE 0302-30 : 2009 | Identical |
| BS EN 61858:2008 | Identical |
| EN 61858:2008 | Identical |
| I.S. EN 61858:2008 | Equivalent |
| DIN EN 61858 : 2009 | Identical |
| BS EN 62056-5-3:2016 | Identical |
| CEI EN 61858 : 2010 | Identical |
| I.S. EN 61858:2008 | Identical |
| UNE-EN 61858:2009 | Identical |
| NF EN 61858 : 2009 | Identical |
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