IEC 60269-6:2010

IEC 60269-6 ®
Edition 1.0 2010-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage fuses –
Part 6: Supplementary requirements for fuse-links for the protection of solar
photovoltaic energy systems
Fusibles basse tension –
Partie 6: Exigences supplémentaires concernant les éléments de remplacement
utilisés pour la protection des systèmes d'énergie solaire photovoltaïque

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IEC 60269-6 ®
Edition 1.0 2010-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage fuses –
Part 6: Supplementary requirements for fuse-links for the protection of solar
photovoltaic energy systems
Fusibles basse tension –
Partie 6: Exigences supplémentaires concernant les éléments de remplacement
utilisés pour la protection des systèmes d'énergie solaire photovoltaïque

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 29.120.50 ISBN 978-2-88912-188-5
– 2 – 60269-6 © IEC:2010
CONTENTS
FOREWORD.4
1 General .6
1.1 Scope and object.6
1.2 Normative references .6
2 Terms and definitions, .7
2.2 General terms .7
3 Conditions for operation in service.10
3.4 Voltage.10
3.4.1 Rated voltage .10
3.5 Current.10
3.5.1 Rated Current.10
3.6 Frequency, power factor and time constant .10
3.6.1 Frequency .10
3.6.2 Power factor .10
3.6.3 Time constant.10
3.10 Temperature inside an enclosure .11
4 Classification.11
5 Characteristics of fuses .11
5.1 Summary of characteristics .11
5.1.2 Fuse-links.11
5.2 Rated voltage.11
5.5 Rated power dissipation of the fuse-link .11
5.6 Limits of time-current characteristics .11
5.6.1 Time-current characteristics, time-current zones .11
5.6.2 Conventional times and currents.11
5.6.3 Gates .12
5.7 Breaking range and breaking capacity.12
5.7.1 Breaking range and utilization category .12
5.7.2 Rated breaking capacity .12
6 Markings .12
6.2 Markings on fuse-links.12
7 Standard conditions for construction.12
7.5 Breaking capacity.12
8 Tests .13
8.1 General .13
8.1.4 Arrangement of the fuse and dimensions .13
8.1.5 Testing of fuse-links .13
8.3 Verification of temperature rise limits and power dissipation.14
8.3.1 Arrangement of the fuse-link.14
8.3.3 Measurement of power dissipation of the fuse-link.14
8.3.5 Acceptability of test results.14
8.4 Verification of operation .15
8.4.1 Arrangement of fuse-link.15
8.4.3 Test method and acceptability of test results .15
8.5 Verification of the breaking capacity .15
8.5.1 Arrangement of the fuse .15

60269-6 © IEC:2010 – 3 –
8.5.5 Test method .16
8.5.8 Acceptability of test results.16
8.11 Mechanical and miscellaneous tests.17
Annex AA (normative) Examples of standardized fuse-links for the protection of solar
photovoltaic energy systems.19
Annex BB (informative) Guidance for the protection of Photovoltaic string and array
with fuse-links designed for PV applications .27
Bibliography.28

Figure 101 – Current of test cycling .18
Figure AA.1 – Fuse-links with cylindrical contact caps, type A .20
Figure AA.2 – Fuse-links with cylindrical contact caps type A with striker – Additional
dimensions for sizes 14 × 51, 20 × 127 and 22 × 127 only .21
Figure AA.3 – North American cylindrical fuse-links with blade contacts – Sizes 61-
600 A.
Figure AA.4 – Fuse-links with blade contacts, type C, C referring IEC 60269-2 “Fuse
system A (NH fuse system)”.24
Figure AA.5 – Fuse-links with long blade contacts, type D .26

Table 101 – Conventional times and currents for "gPV” fuse-links.12
Table 102 – Survey of complete tests on fuse-links and number of fuse-links to be
tested .13
Table 103 – Survey of tests on fuse-links of the smallest rated current of a
homogeneous series and number of fuse-links to be tested .14
Table 104 – Values for breaking-capacity tests on “gPV” fuse-links .16

– 4 – 60269-6 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
LOW-VOLTAGE FUSES –
Part 6: Supplementary requirements for fuse-links
for the protection of solar photovoltaic energy systems

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Or
...