EN IEC 60127-6:2024

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.

oSIST prEN IEC 60127-6:2021
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.
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.

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

oSIST prEN IEC 60127-6:2021
IEC CD 60127-6  IEC 2021 -3- 32C/596/CDV
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

oSIST prEN IEC 60127-6:2021
32C/596/CDV – 4 – IEC CD 60127-6  IEC 2021
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 –
...