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BS EN 61858-1:2014

BS EN 61858-1:2014

$167.15

Electrical insulation systems. Thermal evaluation of modifications to an established electrical insulation system (EIS) – Wire-wound winding EIS

Published By Publication Date Number of Pages
BSI 2014 38
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PDF Catalog

PDF Pages PDF Title
9 English
CONTENTS
11 INTRODUCTION
12 1 Scope
2 Normative references
14 3 Terms and definitions
16 4 General considerations
17 Figures
Figure 1 ā€“ Overview of evaluation methods
18 5 Substitution of phase or ground insulation
5.1 Generically identical
5.2 Substitution or addition of selected components and additives
Figure 2 ā€“ Substitution of phase and ground insulation
19 6 Substitution of winding wire
6.1 Non bondable winding wire
Figure 3 ā€“ Substitution of non-bondable winding wire
20 6.2 Bondable winding wire
Figure 4 ā€“ Substitution of bondable winding wire
21 6.3 Substitution of conductor material
Figure 5 ā€“ Substitution of conductor material
22 7 Substitution of impregnating resin/varnish
7.1 Thermal class determination
Figure 6 ā€“ Substitution of impregnating resin/varnish
23 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
Tables
Table 1 ā€“ Thermal ageing test methods for resin/varnishes
24 9 Evaluation of additions
9.1 Addition of an impregnating resin/varnish
9.2 Addition of other components
Figure 7 ā€“ Additions of resins/varnishes and other components used in combination with the EIMs evaluated in the EIS
25 10 Chemical compatibility of a combination of materials
10.1 General
10.2 Construction
10.2.1 Test apparatus
10.2.2 Material specimens
10.2.3 Contents of tube
26 10.3 Test procedure
10.3.1 Preparation of tubes
10.3.2 Thermal conditioning
10.3.3 Opening procedure
27 10.3.4 Evaluation of samples
11 Single-point thermal ageing test (procedure C)
11.1 Test objects
11.2 Establishing the EIS relative thermal endurance index (EIS RTE)
28 11.3 Interpretation of results
12 Full thermal aging test (procedure D)
29 Annex A (normative) Classes of winding wire
Table A.1 ā€“ Winding wire types ā€“ Round copper or aluminum conductor
31 Annex B (informative) Visual representations of coils
B.1 Form wound coils
Figure B.1 ā€“ Form-wound coil comparison
Figure B.2 ā€“ Form-wound coil comparison ā€“ Close-up
32 B.2 Precision-wound coil
Figure B.3 ā€“ Form-wound coil comparison ā€“ Different angle
Figure B.4 ā€“ Form-wound coil detail
33 B.3 Random-wound coil
Figure B.5 ā€“ Examples of precision-wound coils
Figure B.6 ā€“ Example of precision-wound coil ā€“ Close-up
34 Figure B.7 ā€“ Example of random-wound coil
Figure B.8 ā€“ Example of random-wound coil ā€“ Close-up
35 Bibliography

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BS EN 61858-1:2014
$167.15