SIST EN 60269-1:2007/oprA3:2022

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

Niederspannungssicherungen - Teil 1: Allgemeine Anforderungen

Fusibles basse tension - Partie 1: Exigences générales

Nizkonapetostne varovalke - 1. del: Splošne zahteve - Dopolnilo A3

General Information

• Status: Not Published
• Public Enquiry End Date: 02-Jun-2022
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: EVA - Fuses
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 23-Mar-2022
• Due Date: 10-Aug-2022
• Completion Date: 27-Jul-2022
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: EN 60269-1:2007/prA3:2022 - Amendment 3 - Low-voltage fuses - Part 1: General requirements

Relations

• Amends: SIST EN 60269-1:2007 - Low-voltage fuses -- Part 1: General requirements
• Effective Date: 01-Jun-2021

Standards Content (Sample)

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.

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SIST EN 60269-1:2007/oprA3:2022

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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:


Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
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.

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SIST EN 60269-1:2007/oprA3:2022
-2- 32B/715/CDV
1
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
2
45 5.8 Cut-off current and I t characteristics . 26
46 5.8.1 Cut-off current characteristics . 26

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SIST EN 60269-1:2007/oprA3:2022
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2
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
2
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

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SIST EN 60269-1:2007/oprA3:2022
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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 . 51
105 8.5.4 Calibration of test circuit . 52
106 8.5.5 Test method . 54
107 8.5.6 Ambient air temperature . 55
108 8.5.7 Interpretation of oscillograms . 55
109 8.5.8 Acceptability of test results . 56
110 8.6 Verification of the cut-off current characteristics. 56
111 8.6.1 Test method . 56
112 8.6.2 Acceptability of test results . 57
2
113 8.7 Verification of I t characteristics and overcurrent selectivity . 57
114 8.7.1 Test method . 57
115 8.7.2 Acceptability of test results . 57
116 8.7.3 Verification of compliance for fuse-links at 0,01 s . 57
117 8.7.4 Verification of overcurrent selectivity . 57
118 8.8 Verification of the degree of protection of enclosures . 57
119 8.9 Verification of resistance to heat . 57
120 8.10 Verification of non-deterioration of contacts . 57
121 8.10.1 Arrangement of the fuse . 57
122 8.10.2 Test method . 57
123 8.10.3 Acceptability of test results . 58
124 8.11 Mechanical and miscellaneous tests . 58
125 8.11.1 Mechanical strength . 58
126 8.11.2 Miscellaneous tests . 58
127 Annex A (informative) Measurement of short-circuit power factor . 70
2
128 Annex B (informative) Calculation of pre-arcing I t values for "gG", "gM", “gD” and
2
129 “gN” fuse-links and calculation of operating I t values at reduced voltage . 73
2
130 B.1 Evaluation of the pre-arcing I t value at 0,01 s . 73
2
131 B.2 Calculation of the value of pre-arcing I t under the conditions of test no. 2 . 73
2
132 B.3 Calculation of the value of operating I t at reduced voltage . 73
133 Annex C (informative) Calculation of cut-off current-time characteristic . 75
134 C.1 Preliminary note . 75
135 C.2 Definition . 75
136 C.3 Characteristic . 76
137 C.4 Test condition . 76
138 C.5 Calculation from the measured values . 76
139 Annex D (informative) Effect of change of ambient temperature and surroundings on
140 the performance of fuse-links . 2
141 D.1 Effect of increase of ambient temperature . 2
142 D.1.1 On current rating . 2

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SIST EN 60269-1:2007/oprA3:2022
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143 D.1.2 On temperature rise . 2
144 D.1.3 On conventional fusing and non-fusing current (I and I ) . 2
f nf
145 D.1.4 For motor starting conditions . 2
146 D.2 Effect of decrease of ambient air temperature . 2
147 D.3 Effect of installation conditions . 2
148
149 Figure 1 – Diagram illustrating the means of verification of the time-current
150 characteristic, using the results of the tests at the "gate" currents (example) . 61
151 Figure 2 – Overload curve and time-current characteristic for "a" fuse-links . 62
152 Figure 3 – Time current zone for aM fuses . 63
153 Figure 4 – General presentation of the cut-off characteristics for a series of AC fuse-
154 links 64
155 Figure 5 – Typical diagram of the circuit used for breaking capacity test (see 8.5) . 65
156 Figure 6 – Interpretation of oscillograms taken during the AC breaking-capacity tests
157 (see 8.5.7) . 66
158 Figure 7 – Interpretation of oscillograms taken during the d.c. breaking-capacity tests
159 (see 8.5.7) . 67
160 Figure 8 – Glow-wire and position of the thermocouple . 68
161 Figure 9 –Test apparatus (example) . 69
162 Figure A.1 – Determination of circuit-impedance for calculation of power factor in
163 accordance with method I . 72
164 Figure C.1 – Cut-off current characteristic as a function of actual pre-arcing time . 78
165 Figure E.1 – Connecting samples . 83
166 Figure E.2 – Examples of terminals. 84
167
168
169 Table 1 – Standard values of AC rated voltages for fuses . 21
170 Table 2 – Conventional time and current for "gG", "gK" and "gM" fuse-links . 24
a
171 Table 3 – Gates for specified pre-arcing times of "gG", "gK" and "gM" fuse-links . 24
172 Table 4 – Gates for "aM ' fuse-links (all rated currents) . 25
173 Table 5 – Temperature rise limits ∆T = (T – T ) for contacts and terminals . 29
a
174 Table 6 – Maximum arc voltage . 32
2
175 Table 7 – Pre-arcing I t values at 0,01 s for "gG" and "gM" fuse-links . 33
176 Table 8 – Rated impulse withstand voltage . 34
177 Table 9 – Minimum clearances in air . 34
178 Table 10 – Minimum creepage distances . 34
179 Table 11 – Survey of complete tests on fuse-links and number of fuse-links to be
180 tested . 39
181 Table 12 – Survey of tests on fuse-links of smallest rated current of homogeneous
182 series and number of fuse-links to be tested . 40
183 Table 13 – Survey of tests on fuse-links of rated currents between the largest and the
184 smallest rated current of a homogeneous series and number of fuse-links to be tested . 41
185 Table 14 – Survey of complete tests on fuse-holders and number of fuse-holders to be
186 tested . 41
187 Table 15 – Test voltage . 43

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SIST EN 60269-1:2007/oprA3:2022
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188 Table 16 – Test voltage across the poles for the verification of the suitability for
189 isolation . 43
190 Table 17 – Cross-sectional area of copper conductors for tests corresponding to
191 Subclauses 8.3 and 8.4 . 46
192 Table 18 – Cross-section areas of the copper conductors for the test of “aM” fuses . 49
193 Table 19 – Table for test in Subclause 8.4.3.5 . 50
194 Table 20 – Values for breaking-capacity tests on AC fuses . 53
195 Table 21 – Values for breaking capacity tests on d.c. fuses . 54
196 Table 22 – Preferred values of d.c. rated voltages for fuses . 20
197 Table E.1 – Connectable conductors . 80
198 Table E.2 – Cross-sections of copper conductors connectable to terminals . 80
199 Table E.3 – Pull forces . 82
200
201

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SIST EN 60269-1:2007/oprA3:2022
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202 INTERNATIONAL ELECTROTECHNICAL COMMISSION
203 ___________
204
205 LOW-VOLTAGE FUSES –
206
207 Part 1: General requirements
208
209
210 FOREWORD
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242 This Consolidated version of IEC 60269-1 bears the edition number 4.2. It consists of the
243 fourth edition (2006-11) [documents 32B/483/FDIS and 32B/490/RVD], its amendment 1
244 (2009-04) [documents 32B/534/FDIS and 32B/540/RVD] and its amendment 2 (2014-06)
245 [documents 32B/626/FDIS and 32B/628/RVD]. The technical content is identical to the
246 base edition and its amendments.
247 This Final version does not show whe
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