oSIST prEN IEC 60127-6:2021

Miniature fuses - Part 6: Fuse-holders for miniature fuse-links

Geräteschutzsicherungen - Teil 6: G-Sicherungshalter für G-Sicherungseinsätze

Coupe-circuit miniatures - Partie 6: Ensembles-porteurs pour cartouches de coupe-circuits miniatures

Miniaturne varovalke - 6. del: Ohišja varovalk za miniaturne taljive vložke

General Information

• Status: Not Published
• Public Enquiry End Date: 18-Jul-2021
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: EVA - Fuses
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 07-May-2021
• Due Date: 24-Sep-2021
• 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
• Ref Project: prEN IEC 60127-6:2021 - Miniature fuses - Part 6: Fuse-holders for miniature fuse-links

RELATIONS

• Revised: SIST EN 60127-6:2015 - Miniature fuses - Part 6: Fuse-holders for miniature fuse-links (IEC 60127-6:2014)
• Effective Date: 16-Apr-2019

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN IEC 60127-6:2021
01-julij-2021
Miniaturne varovalke - 6. del: Ohišja varovalk za miniaturne taljive vložke
Miniature fuses - Part 6: Fuse-holders for miniature fuse-links
Geräteschutzsicherungen - Teil 6: G-Sicherungshalter für G-Sicherungseinsätze

Coupe-circuit miniatures - Partie 6: Ensembles-porteurs pour cartouches de coupe-

circuits miniatures
Ta slovenski standard je istoveten z: prEN IEC 60127-6:2021
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
oSIST prEN IEC 60127-6:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 60127-6:2021
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oSIST prEN IEC 60127-6:2021
32C/596/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60127-6 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-04-30 2021-07-23
SUPERSEDES DOCUMENTS:
32C/565/CD, 32C/578A/CC
IEC SC 32C : MINIATURE FUSES
SECRETARIAT: SECRETARY:
China Mr Jianqiang Zou
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:
Miniature fuses - Part 6: Fuse-holders for miniature fuse-links
PROPOSED STABILITY DATE: 2024
NOTE FROM TC/SC OFFICERS:

Please note that the modifications in this CDV compared to the 32C_565_CD are highlighted by colors,

for easier reading
- Red for modified contents.
- Green for new added contents.

Copyright © 2021 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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oSIST prEN IEC 60127-6:2021
32C/596/CDV – 2 – IEC CD 60127-6  IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 2

INTRODUCTION ..................................................................................................................... 4

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 6

3 Terms and Definitions ...................................................................................................... 8

4 General requirements .................................................................................................... 11

5 Preferred ratings and classifications for fuse-holders ..................................................... 11

6 Marking ......................................................................................................................... 12

7 General notes on tests .................................................................................................. 12

7.1 Nature of tests ................................................................................................. 12

7.2 Standard atmospheric conditions for measurement and tests ........................... 12

7.3 Preconditioning of test samples ....................................................................... 12

7.4 Nature of supply............................................................................................... 12

7.5 Gauges for tests .............................................................................................. 12

8 Protection against electric shock ................................................................................... 15

8.1 Category PC1: Fuse-holders without integral protection against electric

shock ............................................................................................................... 15

8.2 Category PC2: Fuse-holders with integral protection against electric

shock ............................................................................................................... 15

8.3 Category PC3: Fuse-holders with enhanced integral protection against

electric shock ................................................................................................... 15

9 Clearances and creepage distances .............................................................................. 15

9.1 General ............................................................................................................ 15

9.2 Minimum requirements for fuse-holders in respect to the grade of

insulation ......................................................................................................... 16

9.3 Clearances ...................................................................................................... 16

9.4 Creepage distances ......................................................................................... 17

10 Electrical requirements .................................................................................................. 18

10.1 Insulation resistance, dielectric strength and impulse withstand voltage ........... 18

10.2 Contact resistance ........................................................................................... 20

11 Mechanical requirements ............................................................................................... 23

11.1 General ............................................................................................................ 23

11.2 Mounting .......................................................................................................... 23

11.3 Compatibility between fuse-holder and fuse-link............................................... 23

11.4 Mechanical strength of the connection between fuse-base and fuse-

carrier .............................................................................................................. 24

11.5 Impact test ....................................................................................................... 24

11.6 Mechanical strength of the fuse-holder fastening on panels ............................. 25

11.7 Terminals of fuse-bases ................................................................................... 27

11.8 Resistance to vibration..................................................................................... 30

12 Thermal requirements .................................................................................................... 31

12.1 Rated power acceptance test ........................................................................... 31

12.2 Resistance to abnormal heat and fire ............................................................... 39

13 Endurance ..................................................................................................................... 40

13.1 General ............................................................................................................ 40

13.2 Endurance test ................................................................................................. 40

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13.3 Requirements .................................................................................................. 40

14 Additional requirements ................................................................................................. 41

14.1 Resistance to rusting ....................................................................................... 41

14.2 Resistance to cleaning solvents ....................................................................... 41

Annex A (normative) Test PC board for fuse-holders of rated currents up to 25 A ................ 42

Annex B (normative) Type tests, test sequences and number of samples ............................ 44

Annex C (informative) Insulation coordination ...................................................................... 45

C.1 Overvoltage categories .................................................................................... 45

C.2 Degrees of pollution in the micro-environment ................................................. 45

C.3 Comparative tracking index CTI ....................................................................... 45

Annex D (informative) Additional tests and requirements ..................................................... 47

D.1 Resistance to shock ......................................................................................... 47

D.2 Verification of the degree of protection of enclosures ....................................... 47

D.3 Climatic category ............................................................................................. 47

Annex E (informative) Information for the correct application of the fuse-holder ................... 49

Bibliography .......................................................................................................................... 50

Figure 1 – Outline of gauges and dummy fuse-links according to IEC 60127-2...................... 13

Figure 2 – Outline of gauges and dummy fuse-links according to IEC 60127-3

standard sheet 1 ................................................................................................................... 14

Figure 3 – Outline of gauges and dummy fuse-links according to IEC 60127-3

standard sheets 3 and 4 ....................................................................................................... 15

Figure 4 – Panel mounting .................................................................................................... 19

Figure 5 – PC board mounting .............................................................................................. 19

Figure 6 – Test device for mechanical test ............................................................................ 23

Figure 7 – Fuse-holder fastening on panels .......................................................................... 26

Figure 8 – Tensile force test ................................................................................................. 29

Figure 9 – Compressive force test ........................................................................................ 29

Figure 10 – Example of Test device ...................................................................................... 32

Figure 11 – Illustration of temperatures experienced in practice ............................................ 35

Figure 12 – Example of a derating curve ............................................................................... 39

Figure A.1 – Example of a test board .................................................................................... 42

Table 1 – Features of unexposed or exposed fuse-holders ..................................................... 5

Table 2 – Values for preferred ratings and classifications ..................................................... 11

Table 3 – Dimensions and materials for gauges according to IEC 60127-2 ........................... 13

Table 4 – Dimensions and materials for gauges according to IEC 60127-3 ........................... 15

Table 5 – Types of insulation between different live parts and accessible parts .................... 16

Table 6 – Required impulse withstand voltage for clearances ............................................... 16

Table 7 – Overvoltage category II ......................................................................................... 17

Table 8 – Overvoltage category III ........................................................................................ 17

Table 9 – Minimum creepage distances in millimetres for a microenvironment-

dependent on rated voltage, pollution degree, insulating material, corresponding to

IEC 60664-1:2020, Table F.5 ................................................................................................ 18

Table 10 − Values for insulation resistance, dielectric strength and impulse withstand

voltage .................................................................................................................................. 22

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Table 11 – Values for torque and axial pull ........................................................................... 24

Table 12 – Torque values ..................................................................................................... 25

Table 13 – Torque values ..................................................................................................... 25

Table 14 – Mounting groups .................................................................................................. 26

Table 15 – Cross-sections of conductors .............................................................................. 27

Table 16 – Tensile and compressive forces .......................................................................... 29

Table 17 – Dimensions and materials for dummy fuse-link according to IEC 60127-2 ........... 32

Table 18 – Dummy fuse-links according to IEC 60127-2 ....................................................... 33

Table 19 – Dimensions and materials for dummy fuse-links according to IEC 60127-3 ......... 34

Table 21 – Maximum allowable temperatures ........................................................................ 37

Table A.1 – Copper layer for test board ................................................................................ 42

Table B.1 – Type tests, test sequences and number of samples ........................................... 44

Table D.1 – Examples of climatic categories ......................................................................... 48

Table E.1 – Information for the correct application of the fuse-holder .................................... 49

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oSIST prEN IEC 60127-6:2021
32C/596/CDV – 2 – IEC CD 60127-6  IEC 2021
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 ____________
4 MINIATURE FUSES –
6 Part 6: Fuse-holders for miniature fuse-links
8 FOREWORD

9 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

10 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

11 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

12 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

13 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

14 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

15 may participate in this preparatory work. International, governmental and non-governmental organizations liaising

16 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

17 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

18 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

19 consensus of opinion on the relevant subjects since each technical committee has representation from all

20 interested IEC National Committees.

21 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

22 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

23 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

24 misinterpretation by any end user.

25 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

26 transparently to the maximum extent possible in their national and regional publications. Any divergence between

27 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

28 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

29 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

30 services carried out by independent certification bodies.

31 6) All users should ensure that they have the latest edition of this publication.

32 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

33 members of its technical committees and IEC National Committees for any personal injury, property damage or

34 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

35 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

36 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

37 indispensable for the correct application of this publication.

38 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

39 rights. IEC shall not be held responsible for identifying any or all such patent rights.

40 International Standard IEC 60127-6 has been prepared by subcommittee 32C: Miniature fuses,

41 of IEC technical committee 32: Fuses.
42 This third edition cancels and replaces the second edition published in 2014.

43 This edition includes the following significant technical changes with respect to the previous

44 edition:
45 a) ...;
46 The text of this standard is based on the following documents:
FDIS Report on voting
32C/XX/FDIS 32C/XX/RVD

48 Full information on the voting for the approval of this standard can be found in the report on

49 voting indicated in the above table.

50 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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51 The committee has decided that the contents of this publication will remain unchanged until the

52 stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to

53 the specific publication. At this date, the publication will be
54 • reconfirmed,
55 • withdrawn,
56 • replaced by a revised edition, or
57 • amended.

59 The National Committees are requested to note that for this publication the stability date

is ….

61 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED

62 AT THE PUBLICATION STAGE.
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oSIST prEN IEC 60127-6:2021
32C/596/CDV – 4 – IEC CD 60127-6  IEC 2021
65 INTRODUCTION

66 According to the wish expressed by the users of miniature fuses, all standards,

67 recommendations and other documents relating to miniature fuses should have the same

68 publication number in order to facilitate reference to fuses in other specifications, for example,

69 equipment specifications.

70 Furthermore, a single publication number and subdivision into parts would facilitate the

71 establishment of new standards, because clauses and subclauses containing general

72 requirements need not be repeated.
73 The new IEC 60127 series is thus subdivided as follows:
74 IEC 60127, Miniature fuses (general title)

75 IEC 60127-1, Part 1: Definitions for miniature fuses and general requirements for miniature

76 fuse-links
77 IEC 60127-2, Part 2: Cartridge fuse-links
78 IEC 60127-3, Part 3: Sub-miniature fuse-links.

79 IEC 60127-4, Part 4: Universal modular fuse-links (UMF) – Through-hole and surface mount

80 types

81 IEC 60127-5, Part 5: Guidelines for quality assessment of miniature fuse-links

82 IEC 60127-6, Part 6: Fuse-holders for miniature fuse-links
83 IEC 60127-7, Part 7: Miniature fuse-links for special applications
84 IEC 60127-8 Part 8: Fuse resistors with particular overcurrent protection
85 IEC 60127-9 (free for further documents).
86 IEC 60127-10, Part 10: User guide for miniature fuses

87 This part of IEC 60127 covers requirements, test equipment and test methods for fuse-holders.

88 It is a self-standing document, which refers back to Part 1 with regard to certain definitions and

89 the atmospheric conditions for test. It also makes reference to other parts of IEC 60127 with

90 regard to dimensions and maximum power losses of fuse-links.
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92 MINIATURE FUSES –
94 Part 6: Fuse-holders for miniature fuse-links
97 1 Scope

98 This part of IEC 60127 is applicable to fuse-holders for miniature cartridge fuse-links according

99 to IEC 60127-2, sub-miniature fuse-links according to IEC 60127-3, universal modular fuse-

100 links to IEC 60127-4 and miniature fuse-links for special applications to IEC 60127-7 for the

101 protection of electric appliances, electronic equipment and component parts thereof, normally

102 intended for use indoors.
103
104 Requirements for IEC 60127-4 and IEC 60127-7 are under consideration.

105 It does not apply to fuse holders for fuses completely covered by the subsequent parts of IEC

106 60269-1.
107 Examples of fuse-holder types with different features are given in Table 1.
108 Table 1 – Features of unexposed or exposed fuse-holders
1 Types of mounting
1.1 Panel and base mounting
1.2 Printed circuit board mounting
2 Methods of fastening
2.1 Methods of fastening on panel:
2.1.1 Fixing nut fastening (threaded nut)
2.1.2 Snap-in fastening:
2.1.2.1 Fuse-base with an integral spring system

2.1.2.2 Fuse-base with a separate spring-nut (a nut fabricated, e.g. from thin spring steel having an

impression designed to accommodate the mating part)
2.2 Methods of fastening on printed circuit (PC) board:
2.2.1 Solder fastening
2.2.2 Plug-in fastening
3 Methods of insertion of the fuse-carrier into the fuse base
3.1 Screw insertion
3.2 Bayonet insertion
3.3 Plug-in insertion
4 Types of terminals
4.1 Screw terminals
4.2 Solder terminals
4.3 Quick connect terminals
4.4 Other solderless terminals: – crimp terminals
– wire wrap terminals
5 Protection against electric shock
5.1 Fuse-holder without integral protection against electric shock
5.2 Fuse-holder with integral protection against electric shock
5.3 Fuse-holder with enhanced integral protection against electric shock

NOTE This list is not intended to be comprehensive and fuse-holders which are not listed are not necessarily

excluded from the scope.
109
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110 This standard applies to fuse-holders with:
111 – a maximum rated current of 25 A and
112 – a maximum rated voltage of 1 500 V d.c. or 1 000 V a.c.; and
113 – for use up to 2 000 m above sea-level, unless otherwise specified.

114 The object of this standard is to establish uniform requirements for safety and the assessment

115 of electrical, mechanical, thermal and climatic properties of fuse-holders and the compatibility

116 between fuse-holders and fuse-links.
117 2 Normative references

118 The following documents, in whole or in part, are normatively referenced in this document and

119 are indispensable for its application. For dated references, only the edition cited applies. For

120 undated references, the latest edition of the referenced document (including any amendments)

121 applies.
122 IEC 60050 (all parts), International Electrotechnical Vocabulary
123
124 IEC 60068-1:2013, Environmental testing - Part 1: General and guidance
125
126 IEC 60068-2-1:2007, Environmental testing - Part 2-1: Tests - Test A: Cold
127

128 IEC 60068-2-2:2007, Environmental testing - Part 2-2: Tests - Test B: Dry heat

129

130 IEC 60068-2-6:2007, Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal)

131

132 IEC 60068-2-20:2008, Environmental testing - Part 2-20: Tests - Test T: Test methods for

133 solderability and resistance to soldering heat of devices with leads
134

135 IEC 60068-2-21:2006, Environmental testing - Part 2-21: Tests - Test U: Robustness of

136 terminations and integral mounting devices
137

138 IEC 60068-2-27:2008, Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock

139

140 IEC 60068-2-45:1980, Basic environmental testing procedures - Part 2-45: Tests - Test XA

141 and guidance: Immersion in cleaning solvents
142 IEC 60068-2-45:1980/AMD1:1993
143

144 IEC 60068-2-47:2005, Environmental testing - Part 2-47: Test - Mounting of specimens for

145 vibration, impact and similar dynamic tests
146

147 IEC 60068-2-75:2014, Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests

148

149 IEC 60068-2-78:2012, Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady

150 State
151

152 IEC 60112:2003, Method for the determination of the proof and the comparative tracking

153 indices of solid insulating materials
154 IEC 60112:2003/AMD1:2009
155

156 IEC 60127-1:2006, Miniature fuses - Part 1: Definitions for miniature fuses and general

157 requirements for miniature fuse-links
158 IEC 60127-1:2006/AMD1:2011
159 IEC 60127-1:2006/AMD2:2015
160 IEC 60127-2:2014, Miniature fuses - Part 2: Cartridge fuse-links
161 IEC 60127-2:2014/AMD1:2020
162
163 IEC 60127-3:2015, Miniature fuses - Part 3: Sub-miniature fuse-links
164 IEC 60127-3:2015/AMD1:2020
165
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166 IEC 60216-1:2013, Electrical insulating materials - Thermal endurance properties - Part 1:

167 Ageing procedures and evaluation of test results
168
169 IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
170 IEC 60529:1989/AMD1:1999
171 IEC 60529:1989/AMD2:2013
172

173 IEC 60664-1:2020, Insulation coordination for equipment within low-voltage systems - Part 1:

174 Principles, requirements and tests
175

176 IEC 60695-4:2012, Fire hazard testing - Part 4: Terminology concerning fire tests for electrotechnical

177 products
178

179 IEC 60695-11-5:2016, Fire hazard testing - Part 11-5: Test flames - Needle-flame test method

180 - Apparatus, confirmatory test arrangement and guidance
181

182 IEC 60695-2-12:2010, Fire hazard testing - Part 2-12: Glowing/hot-wire based test methods -

183 Glow-wire flammability index (GWFI) test method for materials
184 IEC 60695-2-12:2010/AMD1:2014
185

186 IEC 60695-2-13:2010, Fire hazard testing - Part 2-13: Glowing/hot-wire based test methods -

187 Glow-wire ignition temperature (GWIT) test method for materials
188 IEC 60695-2-13:2010/AMD1:2014
189

190 IEC 60999-2:2003, Connecting devices - Electrical copper conductors - Safety requirements for screw-

191 type and screwless-type clamping units - Part 2: Particular requirements for clamping units for

192 conductors above 35 mm2 up to 300 mm2 (included)
193

194 IEC 61140:2016, Protection against electric shock - Common aspects for installation and

195 equipment
196

197 IEC 61210:2010, Connecting devices - Flat quick-connect terminations for electrical copper

198 conductors - Safety requirements
199

200 IEC/TR 60260:1968, Test enclosures of non-injection type for constant relative humidity

201 Note 1 to entry: IEC/TR 60260:1968 is referenced in Clause 11.1.2, however, this Technical Report has been

202 withdrawn in 2000.
203 ISO 3:1973, Preferred numbers – Series of preferred numbers
204
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205 3 Terms and Definitions

206 For the definitions of general terms used in this standard, reference should be made to

207 IEC 60050-441, IEC 60050-581 and IEC 60664-1.

208 For definitions of terms relating to fuse-links, reference is made to IEC 60127-1:2006.

209 For the purposes of this document, the following terms and definitions apply.

210 3.1
211 Fuse-holder
212 combination of a fuse-base with its fuse-carrier

213 Note 1 to entry: In some fuse-holder constructions where the fuse-base and the fuse-carrier are not separate parts

...