EN 60269-1:2007/FprA3:2024

SLOVENSKI STANDARD
SIST EN 60269-1:2007/oprA3:2022
01-junij-2022
Nizkonapetostne varovalke - 1. del: Splošne zahteve - Dopolnilo A3
Amendment 3 - Low-voltage fuses - Part 1: General requirements
Niederspannungssicherungen - Teil 1: Allgemeine Anforderungen
Fusibles basse tension - Partie 1: Exigences générales
Ta slovenski standard je istoveten z: EN 60269-1:2007/prA3:2022
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
SIST EN 60269-1:2007/oprA3:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 60269-1:2007/oprA3:2022

SIST EN 60269-1:2007/oprA3:2022
32B/715/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60269-1/AMD3 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-03-11 2022-06-03
SUPERSEDES DOCUMENTS:
32B/702/CD, 32B/708A/CC
IEC SC 32B : LOW-VOLTAGE FUSES
SECRETARIAT: SECRETARY:
Germany Mr Michael Altenhuber
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Amendment 3 - Low-voltage fuses - Part 1: General requirements

PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

SIST EN 60269-1:2007/oprA3:2022
-2- 32B/715/CDV
2 All changes to the present edition are marked in red for easier reading
3 CONTENTS
4 1 General . 10
5 1.1 Scope and object . 10
6 1.2 Normative references . 10
7 2 Terms and definitions . 11
8 2.1 Fuses and their component parts . 12
9 2.2 General terms . 13
10 2.3 Characteristic quantities . 15
11 2.4 List of symbols and symbols used in this standard
12 3 Conditions for operation in service . 19
13 3.1 Ambient air temperature (T ) . 19
a
14 3.2 Altitude . 19
15 3.3 Atmospheric conditions . 19
16 3.4 Voltage . 19
17 3.5 Current . 19
18 3.6 Frequency, power factor and time constant . 20
19 3.6.1 Frequency . 20
20 3.6.2 Power factor . 20
21 3.6.3 Time constant . 20
22 3.7 Conditions of installation . 20
23 3.8 Utilization category . 20
24 3.9 Discrimination of fuse-links . 20
25 4 Classification . 20
26 5 Characteristics of fuses . 20
27 5.1 Summary of characteristics . 20
28 5.1.1 Fuse-holders . 20
29 5.1.2 Fuse-links . 20
30 5.1.3 Complete fuses. 21
31 5.2 Rated voltage . 21
32 5.3 Rated current . 22
33 5.3.1 Rated current of the fuse-link . 22
34 5.3.2 Rated current of the fuse-holder . 22
35 5.4 Rated frequency (see 6.1 and 6.2) . 22
36 5.5 Rated power dissipation of a fuse-link and rated acceptable power
37 dissipation of a fuse-holder . 22
38 5.6 Limits of time-current characteristics . 22
39 5.6.1 Time-current characteristics, time-current zones . 22
40 5.6.2 Conventional times and currents . 23
41 5.6.3 Gates . 24
42 5.7 Breaking range and breaking capacity . 25
43 5.7.1 Breaking range and utilization category . 25
44 5.7.2 Rated breaking capacity . 25
45 5.8 Cut-off current and I t characteristics . 26
46 5.8.1 Cut-off current characteristics . 26

SIST EN 60269-1:2007/oprA3:2022
-3-
47 5.8.2 I t characteristics . 26
48 6 Markings . 26
49 6.1 General . 26
50 6.2 Markings of fuse-holders . 26
51 6.3 Markings of fuse-links . 27
52 6.4 Marking symbols . 27
53 7 Standard conditions for construction . 27
54 7.1 Mechanical design . 27
55 7.1.1 Replacement of fuse-links. 27
56 7.1.2 Connections, including terminals . 27
57 7.1.3 Fuse-contacts . 28
58 7.2 Insulating properties and suitability for isolation . 28
59 7.3 Temperature rise, power dissipation of the fuse-link and acceptable power
60 dissipation of a fuse-holder . 28
61 7.4 Operation . Error! Bookmark not defined.
62 7.5 Breaking capacity . 30
63 7.6 Cut-off current characteristic . 32
64 7.7 I t characteristics . 32
65 7.8 Overcurrent selectivity of fuse-links . 33
66 7.9 Protection against electric shock . 33
67 7.9.1 Clearances and creepage distances . 34
68 7.9.2 Leakage currents of fuses suitable for isolation . 34
69 7.9.3 Additional constructional requirements for fuses for linked fuse-carriers,
70 suitable for isolation . 35
71 7.10 Resistance to heat . 35
72 7.11 Mechanical strength . 35
73 7.12 Resistance to corrosion . 35
74 7.12.1 Resistance to rusting . 35
75 7.12.2 Resistance to season cracking . 36
76 7.13 Resistance to abnormal heat and fire . 36
77 7.14 Electromagnetic compatibility . 36
78 8 Tests . 36
79 8.1 General . 36
80 8.1.1 Kind of tests . 36
81 8.1.2 Ambient air temperature (T ) . 36
a
82 8.1.3 Condition of the fuse. 36
83 8.1.4 Arrangement of the fuse and dimensions . 37
84 8.1.5 Testing of fuse-links . 37
85 8.1.6 Testing of fuse-holders . 41
86 8.2 Verification of the insulating properties and of the suitability for isolation . 42
87 8.2.1 Arrangement of the fuse-holder . 42
88 8.2.2 Verification of the insulating properties . 42
89 8.2.3 Verification of the suitability for isolation . 43
90 8.2.4 Acceptability of test results . 44
91 8.3 Verification of temperature rise and power dissipation . 44
92 8.3.1 Arrangement of the fuse . 44
93 8.3.2 Measurement of the temperature rise . 44
94 8.3.3 Measurement of the power dissipation of the fuse-link . 44

SIST EN 60269-1:2007/oprA3:2022
-4- 32B/715/CDV
95 8.3.4 Test method . 45
96 8.3.5 Acceptability of test results . 46
97 8.4 Verification of operation . 47
98 8.4.1 Arrangement of the fuse . 47
99 8.4.2 Ambient air temperature . 47
100 8.4.3 Test method and acceptability of test results . 47
101 8.5 Verification of the breaking capacity. 51
102 8.5.1 Arrangement of the fuse . 51
103 8.5.2 Characteristics of the test circuit . 51
104 8.5.3 Measuring instruments .
...