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IEC 60947-7-3 Ed. 2.0 Low-voltage switchgear and controlgear - Part 7-3: Ancillary equipment - Safety requirements for fuse terminal blocks

Standard Number:  IEC 60947-7-3 Ed. 2.0
Title:  Low-voltage switchgear and controlgear - Part 7-3: Ancillary equipment - Safety requirements for fuse terminal blocks
Language:  English and French
Replacing Standard:  IEC 60947-7-3 Ed. 1.0

Status:  Current
Publisher:  International Electrotechnical Commission (IEC)
Price:  
Number of Pages:75  

Description:IEC 60947-7-3-2009 Low-voltage switchgear and controlgear - Part 7-3: Ancillary equipment - Safety requirements for fuse terminal blocks applies to fuse terminal blocks with screw-type or screwless-type clamping units for the connection of rigid (solid or stranded) or flexible copper conductors for the reception of cartridge fuse-links in accordance with IEC 60127-2, intended primarily for industrial or similar use in circuits not exceeding 1 000 V a.c., up to 1 000 Hz or 1 500 V d.c., and having a maximum short-circuit breaking capacity of 1 500 A. They are intended for installation in electrical equipment with enclosures which surround the fuse terminal blocks to such an extent that they are accessible only with the aid of a tool. For certain applications, for example in control circuits, the fuse terminal blocks may be designed exclusively for short-circuit protection. The object of this standard is to specify safety requirements and test methods for the mechanical, electrical and thermal characteristics of fuse terminal blocks, to ensure the compatibility between terminal blocks and standardized fuse-links. This standard may be used as a guide for - fuse terminal blocks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etc.; - fuse terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displacement connections, etc. Where applicable in this standard, the term ""clamping unit"" has been used instead of the term ""terminal"". This is taken into account in case of reference to IEC 60947-1. The main technical modifications of this standard since this previous publication are listed below- - requirements regarding clearances and creepage distances replaced by reference to Annex H of IEC 60947-1; - requirements for the test of the mechanical strength of the clamping units improved in 8.3.3.1; - requirements for tightening torques for the tests improved and referenced to Table 4 of IEC 60947-1; - requirements for the resistance and the dimensions of dummy fuse-links specified in 8.5.2.5. This publication shall be read in conjunction with IEC 60947-1-2007 and IEC 60947-7-1-2  
Catalog:Document Contents
English
CONTENTS
FOREWORD
INTRODUCTION
1 General
1.1 Scope
1.2 Normative references
2 Definitions
3 Classification
4 Characteristics
4.1 Fuse-links
4.2 Rated power dissipation value
4.3 Rated and limiting values
5 Product information
5.1 Marking
5.2 Additional information
5.3 Marking on the packing unit
6 Normal service, mounting and transport conditions
7 Constructional and performance requirements
7.1 Constructional requirements
7.2 Performance requirements
7.3 Electromagnetic compatibility (EMC)
8 Tests
8.1 Kinds of test
8.2 General
8.3 Verification of mechanical characteristics
8.4 Verification of electrical characteristics
8.5 Verification of thermal characteristics
8.6 Verification of EMC characteristics
Annex A (normative) Gauges
Annex B (informative) Power dissipation values PV and PVK
Annex C (normative) Order of tests and number of specimens
Bibliography
Figures
Figure 1 ? Test arrangement for the verification of the contact resistance
Figure 2 ? Test arrangement for separate arrangement
Figure 3 ? Test arrangement for compound arrangement
Figure 4 ? Test arrangement for compound arrangement of short-circuit protection
Figure 5 ? Test arrangement for the needle flame test
Figure 6 ? Point of test flame contact (view from the layer placed below the fuse termina...
Figure A.1 – Outline of the gauges
Figure B.1 ? Derating curve in the case of exclusive short-circuit protection for a separ...
Figure B.2 ? Derating curve in the case of exclusive short-circuit protection for a compo...
Figure B.3 ? Derating curve in the case of overload and short-circuit protection for a se...
Figure B.4 ? Derating curve in the case of overload and short-circuit protection for a co...
Tables
Table 1 ? Test forces
Table 2 ? Dummy fuse-links
Table A.1 ? Dimensions and materials for gauges for fuse-links according to IEC 60127-2
Table B.1 – Results of derating curves in the case of exclusive short-circuit protection
Table B.2 ? Results of derating curves in case of overload and short-circuit protection
Table C.1 – Order of tests and number of specimens
Fran?ais
SOMMAIRE
AVANT-PROPOS
INTRODUCTION
1 Généralités
1.1 Domaine d'application
1.2 Références normatives
2 Définitions
3 Classification
4 Caractéristiques
4.1 Eléments de remplacement
4.2 Valeur assignée de la puissance dissipée
4.3 Valeurs assignées et valeurs limites
5 Information sur le matériel
5.1 Marquage
5.2 Informations complémentaires
5.3 Marquage sur l'emballage
6 Conditions normales de service, de montage et de transport
7 Dispositions relatives à la construction et au fonctionnement
7.1 Dispositions relatives à la construction
7.2 Dispositions relatives au fonctionnement
7.3 Compatibilité électromagnétique (CEM)
8 Essais
8.1 Nature des essais
8.2 Généralités
8.3 Vérification des caractéristiques mécaniques
8.4 Vérification des caractéristiques électriques
8.5 Vérification des caractéristiques thermiques
8.6 Vérification des caractéristiques de CEM
Annexe A (normative) Gabarits
Annexe B (informative) Valeurs des puissances dissipées PV et PVK
Annexe C (normative) Ordre des essais et nombre d'échantillons
Bibliographie
Figures
Figure 1 ? Disposition d'essai pour la vérification de la résistance de contact
Figure 2 ? Disposition d'essai pour une disposition séparée
Figure 3 ? Disposition d'essai pour une disposition groupée
Figure 4 ? Disposition d'essai pour une disposition groupée contre les courts-circuits
Figure 5 – Disposition d’essai pour l’essai au br?leur-aiguille
Figure 6 ? Point de contact de la flamme d'essai (vue depuis la couche située sous le blo...
Figure A.1 – Profil des gabarits
Figure B.1 ? Courbe de déclassement dans le cas d?une protection exclusive contre les cou...
Figure B.2 ? Courbe de déclassement dans le cas d?une protection exclusive contre les cou...
Figure B.3 – Courbe de déclassement dans le cas d’une protection contre les courts-circui...
Figure B.4 – Courbe de déclassement dans le cas d’une protection contre les courts-circui...
Tableaux
Tableau 1 ? Efforts d'essai
Tableau 2 ? Eléments de remplacement conventionnels d'essai
Tableau A.1 – Dimensions et matériaux pour les gabarits pour éléments de?remplacement con...
Tableau B.1 – Résultats des courbes de déclassement dans le cas d’une protection exclusiv...
Tableau B.2 ? Résultats des courbes de déclassement dans le cas d?une protection contre l...
Tableau C.1 – Ordre des essais et nombre d'échantillons
  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  238KB
Tile in English:  Low-voltage switchgear and controlgear - Part 7-3: Ancillary equipment - Safety requirements for fuse terminal blocks

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