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IEC 60947-7-4:2013

(Main)

Low-voltage switchgear and controlgear - Part 7-4: Ancillary equipment - PCB terminal blocks for copper conductors

Low-voltage switchgear and controlgear - Part 7-4: Ancillary equipment - PCB terminal blocks for copper conductors

IEC 60947-7-4:2013 specifies requirements for PCB terminal blocks primarily intended for industrial or similar use. Mounting and fixing on the printed circuit board is made by soldering, press-in or equivalent methods to provide electrical and mechanical connection between copper conductors and the printed circuit board. This standard applies to PCB terminal blocks intended to connect copper conductors, with or without special preparation, having a cross-section between 0,05 mm2 and 300 mm2 (AWG 30/600 kcmil), intended to be used in circuits of a rated voltage not exceeding 1 000 V a.c. up to 1 000 Hz or 1 500 V d.c.

Appareillage à basse tension - Partie 7-4: Matériels accessoires - Blocs de jonction pour cartes de circuits imprimés pour conducteurs en cuivre

La CEI 60947-7-4:2013 spécifie les exigences concernant les blocs de jonction pour cartes de circuits imprimés destinés principalement à un usage industriel ou similaire. Le montage et la fixation sur la carte de circuits imprimés s'effectuent par brasage, insertion à force ou par des méthodes équivalentes afin d'assurer une connexion électrique et mécanique entre les conducteurs en cuivre et la carte de circuits imprimés. La présente norme s'applique aux blocs de jonction pour cartes de circuits imprimés destinés à connecter les conducteurs en cuivre, avec ou sans préparation spéciale, dont la section est comprise entre 0,05 mm2 et 300 mm2 (AWG 30/600 kcmil), destinés à être utilisés dans les 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 au maximum.

General Information

Status
Published
Publication Date
05-Aug-2013
ICS
29.130.20 - Low voltage switchgear and controlgear
Technical Committee
SC 121A - Low-voltage switchgear and controlgear
Drafting Committee
MT 8 - TC 121/SC 121A/MT 8
Current Stage
DELPUB - Deleted Publication
Start Date
22-Mar-2017
Completion Date
18-Jan-2019
Ref Project

Relations

Revised
IEC 60947-7-4:2019 - Low-voltage switchgear and controlgear - Part 7-4: Ancillary equipment - PCB terminal blocks for copper conductors
Effective Date
05-Sep-2023

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IEC 60947-7-4:2013 - Low-voltage switchgear and controlgear - Part 7-4: Ancillary equipment - PCB terminal blocks for copper conductors Released:8/6/2013IEC 60947-7-4:2013 - Low-voltage switchgear and controlgear - Part 7-4: Ancillary equipment - PCB terminal blocks for copper conductors Released:8/6/2013
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IEC 60947-7-4:2013 - Low-voltage switchgear and controlgear - Part 7-4: Ancillary equipment - PCB terminal blocks for copper conductors Released:8/6/2013
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IEC 60947-7-4 ®
Edition 1.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –
Part 7-4: Ancillary equipment – PCB terminal blocks for copper conductors

Appareillage à basse tension –
Partie 7-4: Matériels accessoires – Blocs de jonction pour cartes de circuits
imprimés pour conducteurs en cuivre

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

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IEC 60947-7-4 ®
Edition 1.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –

Part 7-4: Ancillary equipment – PCB terminal blocks for copper conductors

Appareillage à basse tension –

Partie 7-4: Matériels accessoires – Blocs de jonction pour cartes de circuits

imprimés pour conducteurs en cuivre

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.130.20 ISBN 978-2-8322-1029-1

– 2 – 60947-7-4 © IEC:2013
CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 General . 7

1.1 Scope . 7

1.2 Normative references . 7

2 Terms and definitions . 9

3 Classification . 10

4 Characteristics . 10
4.1 Summary of characteristics . 10
4.2 Type of PCB terminal block . 10
4.3 Rated and limiting values . 10
4.3.1 Rated voltages . 10
4.3.2 Rated current . 10
4.3.3 Standard cross-sections . 10
4.3.4 Maximum cross-section . 11
4.3.5 Connecting capacity . 11
5 Product information . 12
5.1 Marking . 12
5.2 Additional information . 13
6 Normal service, mounting and transport conditions . 13
7 Constructional and performance requirements . 13
7.1 Constructional requirements . 13
7.1.1 Clamping units . 13
7.1.2 Mounting and installation . 14
7.1.3 Clearances and creepage distances . 14
7.1.4 Terminal identification and marking . 14
7.1.5 Resistance to abnormal heat and fire . 15
7.1.6 Maximum cross-section and connecting capacity . 15
7.2 Performance requirements . 15
7.2.1 Temperature rise . 15
7.2.2 Dielectric properties . 15
7.2.3 Short-time withstand current . 15

7.2.4 Contact resistance . 16
7.2.5 Ageing test (climatic sequence and corrosion test) . 16
7.3 Electromagnetic compatibility (EMC) . 16
8 Tests . 16
8.1 Kinds of test . 16
8.2 General . 16
8.3 Verification of mechanical characteristics . 17
8.3.1 General . 17
8.3.2 Attachment of the PCB terminal block on its support . 17
8.3.3 Vacant . 17
8.3.4 Verification of the maximum cross-section and connecting capacity . 17
8.3.5 Verification of maximum cross-section (special test with gauges) . 17
8.4 Verification of electrical characteristics . 17
8.4.1 General . 17

60947-7-4 © IEC:2013 – 3 –
8.4.2 Verification of clearances and creepage distances. 18

8.4.3 Dielectric tests . 18

8.4.4 Verification of contact resistance . 19

8.4.5 Temperature rise test . 20

8.4.6 Short-time withstand current test . 22

8.4.7 Ageing test (climatic sequence and corrosion test) . 23

8.5 Verification of thermal characteristics . 24

8.6 Verification of EMC characteristics . 25

8.6.1 General . 25

8.6.2 Immunity. 25

8.6.3 Emission. 25
Annex A (informative) Structure of a PCB terminal block . 26
Annex B (informative) Additional Information to be specified between manufacturer
and user . 27
Annex C (informative) Examples of PCBs and PCB terminal blocks for high current
application . 28
Bibliography . 30

Figure 1 – Test assembly for the measurement of contact resistance and temperature
rise . 20
Figure 2 – Example of wiring structure of a multi-tier PCB terminal block . 21
Figure 3 – Test assembly for the measurement of short-time withstand current . 23
Figure 4 – Test sequence . 24
Figure A.1 – Structure of a PCB terminal block . 26
Figure C.1 – Structure of a high current PCB . 28
Figure C.2 – PCB terminal block with soldered connection to the PCB . 28
Figure C.3 – PCB terminal block with screwed connection to the PCB . 29

Table 1 – Standard cross-sections of copper conductors . 11
Table 2 – Relationship between maximum cross-section and connecting capacity of
PCB terminal blocks. 12
Table 3 – Standards for clamping units and connecting methods . 14
Table 4 – Impulse withstand test voltages .
...

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