IEC TR 62655:2013

IEC/TR 62655 ®
Edition 1.0 2013-05
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Tutorial and application guide for high-voltage fuses

Guide explicatif et d'application pour les fusibles à haute tension

IEC/TR 62655:2013
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IEC/TR 62655 ®
Edition 1.0 2013-05
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
Tutorial and application guide for high-voltage fuses

Guide explicatif et d'application pour les fusibles à haute tension

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XF
ICS 29.120.50 ISBN 978-2-83220-811-3

– 2 – TR 62655 © IEC:2013
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
0.1 Aims and objectives of this technical report . 7
0.2 How to use this technical report . 7
0.2.1 General . 7
0.2.2 Fuse tutorial . 7
0.2.3 Application information . 7
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviations . 10
3.1 Terms and definitions . 10
3.2 Abbreviations . 10
4 Tutorial section . 10
4.1 A simple introduction to fuses . 10
4.1.1 General . 10
4.1.2 Fuse classifications and terms . 13
4.1.3 Basic principles of fuse operation . 15
4.1.4 Advantages of fuse protection . 15
4.1.5 Advantages of current-limiting fuses . 16
4.1.6 Types of high voltage fuses . 17
4.1.7 Application of fuse types . 20
4.2 Current-limiting fuses . 20
4.2.1 Construction and operation of current-limiting fuses . 20
4.2.2 Classification of current-limiting fuses . 24
4.2.3 Ratings of current-limiting fuses . 25
4.2.4 Characteristics of current-limiting fuses . 26
4.3 Expulsion fuses . 29
4.3.1 General operating principles . 29
4.3.2 Construction and operation of expulsion fuses . 30
4.3.3 Classification of expulsion fuses . 36
4.3.4 Ratings of expulsion fuses . 36
4.3.5 Characteristics of expulsion fuses . 37
4.4 Other related protective devices . 38
4.4.1 General . 38
4.4.2 Electronically activated devices . 38
4.4.3 Additional types of non-current limiting fuse . 40
4.5 Fuse-bases (fuse-mounts or fuse supports) . 41
4.5.1 General . 41
4.5.2 Insulation properties . 41
4.5.3 Current rating . 42
5 Application section . 43
5.1 General application information . 43
5.1.1 Service considerations . 43
5.1.2 Current rating selection . 52
5.1.3 Selection of the rated voltage of the fuse . 52
5.1.4 Coordination between fuses, and between fuses and other protective
devices . 55

TR 62655 © IEC:2013 – 3 –
5.1.5 Current rating and breaking capacity considerations for fuses in
parallel . 64
5.1.6 Voltage considerations of fuses in series . 65
5.1.7 Fuse recovery voltage withstand . 66
5.1.8 Partial discharge. 66
5.2 Typical applications . 66
5.2.1 Protection of cables and overhead lines . 66
5.2.2 Distribution transformer applications . 71
5.2.3 Motor-circuit applications . 86
5.2.4 Capacitor protection applications . 90
5.2.5 Voltage transformer applications. 104
5.2.6 Wind power generation applications . 105
5.2.7 Current-limiting fuses used in conjunction with mechanical switching
devices . 108
5.3 Installation, operation, maintenance and replacement considerations . 111
5.3.1 General . 111
5.3.2 Installation guidelines . 112
5.3.3 Operation guidelines . 113
5.3.4 Maintenance considerations . 114
5.3.5 Replacement considerations . 116
5.4 Recycling . 118
Annex A (informative) Practical guidelines for thermal de-rating of current-limiting
fuses. 119
Bibliography . 126

Figure 1 – Fuse pre-arcing time-current characteristic curve . 11
Figure 2 – High current interruption by current-limiting fuse and expulsion fuse . 13
Figure 3 – Comparison of operating Joule integral (I t) versus prospective current for
current-limiting fuses and non-current-limiting fuses . 17
Figure 4 – Cut-away drawing of typical current-limiting fuse-link of the "DIN"
dimensioned type . 21
Figure 5 – Current ranges for which different fuse classifications are intended . 24
Figure 6 – Typical cut-off characteristics . 27
Figure 7 – Distribution fuse-cutout construction . 31
Figure 8 – Types of expulsion fuse . 34
Figure 9 – Class B expulsion fuse . 35
Figure 10 – Schematic of a commutating type of curr
...