EN IEC 60947-7-1:2025
(Main)Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks for copper conductors
Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks for copper conductors
IEC 60947-7-1:2025 specifies requirements for terminal blocks and test disconnect terminal blocks according to Annex D with screw-type or screw-less-type clamping units primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection between copper conductors. It applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0,05 mm2/30 AWG and 300 mm2/600 kcmil, intended to be used in circuits of a rated voltage not exceeding 1 000 V AC up to 1 000 Hz or 1 500 V DC. The tests on terminal blocks are made with AC or DC supply as required in relevant clauses of this document. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Scope extension for smaller conductor cross-sections; b) Implementation of a contact pressure via insulation material (CoPI) test; c) Introduction of new informative Annex E for larger cross-sections; d) Reorganisation of all tables merged into two tables for electrical and mechanical values; e) Implementation of AWG-sizes conductor types as an equivalent type of metric conductor with examples in Annex C; f) Reorganisation of Annex D test disconnect terminal blocks to enhance readability; g) Introduction of new informative Annex A for main characteristics of terminal blocks.
Niederspannungsschaltgeräte - Teil 7-1: Hilfseinrichtungen - Reihenklemmen für Kupferleiter
Appareillage à basse tension - Partie 7-1: Matériels accessoires - Blocs de jonction pour conducteurs en cuivre
L'IEC 60947-7-1:2025 spécifie les exigences pour les blocs de jonction et les blocs de jonction de déconnexion d'essai conformément à l'Annexe D avec des organes de serrage du type à vis ou du type sans vis, destinés principalement à des usages industriels ou analogues et à être fixés sur un support afin d'assurer une connexion électrique et mécanique entre des conducteurs en cuivre. Elle s'applique aux blocs de jonction destinés à raccorder des conducteurs ronds en cuivre, avec ou sans préparation spéciale, de section comprise entre 0,05 mm2/AWG 30 et 300 mm2/600 kcmil, destinés à être insérés dans des circuits dont la tension assignée ne dépasse pas 1 000 V en courant alternatif jusqu'à 1 000 Hz ou 1 500 V en courant continu. Les essais sur les blocs de jonction sont effectués avec une alimentation en courant alternatif ou en courant continu, selon les exigences des articles concernés du présent document. Cette quatrième édition annule et remplace la troisième édition parue en 2009. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) extension du domaine d'application pour les plus petites sections de conducteurs; b) mise en œuvre d'un essai de pression de contact par l'intermédiaire d'un matériau isolant (CoPI); c) ajout d'une nouvelle Annexe E informative pour les sections plus grandes; d) réorganisation de tous les tableaux fusionnés en deux tableaux pour les valeurs électriques et mécaniques; e) mise en œuvre des types de conducteurs de tailles AWG selon un type équivalent de conducteur métrique, avec des exemples, à l'Annexe C; f) réorganisation de l'Annexe D concernant les blocs de jonction de déconnexion d'essai afin d'améliorer la lisibilité; g) ajout d'une nouvelle Annexe A informative concernant les caractéristiques principales des blocs de jonction.
Nizkonapetostne stikalne in krmilne naprave - 7-1. del: Pomožna oprema - Priključni bloki za bakrene vodnike (IEC 60947-7-1:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 60947-7-1:2024
01-februar-2024
Nizkonapetostne stikalne in krmilne naprave - 7-1. del: Pomožna oprema -
Priključni bloki za bakrene vodnike
Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks
for copper conductors
Niederspannungsschaltgeräte - Teil 7-1: Hilfseinrichtungen - Reihenklemmen für
Kupferleiter
Appareillage à basse tension - Partie 7-1: Matériels accessoires - Blocs de jonction pour
conducteurs en cuivre
Ta slovenski standard je istoveten z: prEN IEC 60947-7-1:2023
ICS:
29.120.99 Druga električna dodatna Other electrical accessories
oprema
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
oSIST prEN IEC 60947-7-1:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 60947-7-1:2024
oSIST prEN IEC 60947-7-1:2024
121A/579/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60947-7-1 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-12-08 2024-03-01
SUPERSEDES DOCUMENTS:
121A/560/CD, 121A/567A/CC
IEC SC 121A : LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR
SECRETARIAT: SECRETARY:
France Mr Michaël LAHEURTE
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
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Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks for
copper conductors
PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
SC121A Officers support circulation of CDV for project IEC 60947-7-1 ED4.
Secretary Note: NC experts are kindly requested to refer their comments to line number.
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.
oSIST prEN IEC 60947-7-1:2024
IEC CDV 60947-7-1 © IEC 2023 2 121A/579/CDV
1 CONTENTS
3 FOREWORD. 5
4 1 Scope . 7
5 2 Normative references . 7
6 3 Terms and definitions . 8
7 4 Classification . 8
8 5 Characteristics . 9
9 5.1 Summary of characteristics . 9
10 5.2 Type of terminal block . 9
11 5.3 Rated and limiting values . 9
12 5.3.1 Rated voltages . 9
13 5.3.2 Short-time withstand current . 9
14 5.3.3 Standard cross-section . 9
15 5.3.4 Rated cross-section . 9
16 5.3.5 Rated connecting capacity . 9
17 6 Product information . 10
18 6.1 Marking . 10
19 6.1.1 Manufacturer or trade mark . 10
20 6.1.2 Type reference . 10
21 6.1.3 Very small terminal blocks . 10
22 6.2 Additional information . 10
23 7 Normal service, mounting and transport conditions . 10
24 8 Constructional and performance requirements . 11
25 8.1 Constructional requirements . 11
26 8.1.1 Clamping units . 11
27 8.1.2 Mounting . 11
28 8.1.3 Clearances and creepage distances . 11
29 8.1.4 Terminal block identification and marking . 11
30 8.1.5 Resistance to abnormal heat and fire . 11
31 8.1.6 Rated cross-section and rated connecting capacity . 12
32 8.2 Performance requirements . 12
33 8.2.1 Temperature rise. 12
34 8.2.2 Dielectric properties . 12
35 8.2.3 Short-time withstand current . 12
36 8.2.4 Voltage drop . 12
37 8.2.5 Electrical performance after ageing (for screwless-type terminal blocks
38 only) . 12
39 8.2.6 Contact pressure via insulating material (CoPI) . 12
40 8.3 Electromagnetic compatibility . 13
41 9 Tests . 13
42 9.1 Kinds of test . 13
43 9.2 General . 13
44 9.3 Verification of mechanical characteristics . 13
45 9.3.1 General . 13
46 9.3.2 Attachment of the terminal block on its support . 14
47 9.3.3 Mechanical properties of clamping units . 14
48 9.4 Verification of electrical characteristics . 16
49 9.4.1 General . 16
oSIST prEN IEC 60947-7-1:2024
IEC CDV 60947-7-1 © IEC 2023 3 121A/579/CDV
50 9.4.2 Verification of clearances and creepage distances . 16
51 9.4.3 Dielectric tests . 16
52 9.4.4 Verification of the voltage drop . 17
53 9.4.5 Temperature-rise test . 18
54 9.4.6 Short-time withstand current test . 19
55 9.4.7 Ageing test (for screwless-type terminal blocks only) . 19
56 9.4.8 Contact pressure via insulating material (CoPI) test . 20
57 9.5 Verification of thermal characteristics . 21
58 9.6 Verification of EMC characteristics . 22
59 9.6.1 Immunity . 22
60 9.6.2 Emission . 22
61 Annex A Vacant . 32
62 Annex B (informative) Items subject to agreement between manufacturer and user . 33
63 Annex C (informative) Examples for verifying the connecting capacity based on tests
64 with both metric and AWG/kcmil conductors . 34
65 C.1 Example 1: Testing with metric conductors . 34
66 C.2 Example 2: Testing with metric and AWG/kcmil conductors . 34
67 C.3 Example 3: Testing with AWG/kcmil conductors . 34
68 Annex D (normative) Requirements for test disconnect terminal blocks . 35
69 D.1 Scope . 35
70 D.2 Normative references . 35
71 D.3 Terms and definitions . 35
72 D.4 Classification . 35
73 D.5 Characteristics . 35
74 D.5.1 Summary of characteristics . 35
75 D.5.2 Type of test disconnect terminal block . 36
76 D.5.3 Rated and limiting values . 36
77 D.6 Product information . 36
78 D.6.1 Marking . 36
79 D.6.2 Additional information . 37
80 D.7 Normal service, mounting and transport conditions . 37
81 D.8 Constructional and performance requirements . 37
82 D.8.1 Constructional requirements . 37
83 D.8.2 Performance requirements . 38
84 D.8.3 Service life . 39
85 D.8.4 Electromagnetic compatibility . 39
86 D.9 Tests . 40
87 D.9.1 Kinds of test . 40
88 D.9.2 General . 40
89 D.9.3 Verification of mechanical characteristics . 40
90 D.9.4 Verification of electrical characteristics . 40
91 D.9.5 Verification of thermal characteristics . 44
92 D.9.6 Service life . 44
93 D.9.7 Verification of EMC characteristics . 45
94 Annex E (informative) Electrical and mechanical parameters for terminal blocks used
95 with conductors of rated cross-section above 300 mm²/600 kcmil . 48
96 Bibliography . 49
98 Figure 1 – Arrangement for test according to 9.3.2 . 14
99 Figure 2 – Arrangement for tests according to 9.4.5 and 9.4.7, and for the verification
100 of voltage drop.
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