NF EN ISO 17657-3

December 2007

Standard Current

Resistance welding - Welding current measurement for resistance welding - Part 3 : current sensing coil

ISO 17657-3:2005 specifies current sensing coils of the toroidal-coil type as a current sensor for welding current meters or a welding current measuring system used to monitor the welding current in resistance welding, and is applicable for both current types, i.e. alternating current of 50 Hz or 60 Hz and direct current.

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Main informations

Collections

National standards and national normative documents

Publication date

December 2007

Number of pages

26 p.

Reference

NF EN ISO 17657-3

ICS Codes

25.160.10 Welding processes

Classification index

A89-579-3

Print number

1 - novembre 2007

International kinship

ISO 17657-3:2005

European kinship

EN ISO 17657-3:2007

Sumary

Resistance welding - Welding current measurement for resistance welding - Part 3 : current sensing coil

Table of contents

Avant-propos
iv
Introduction
v
1 Domaine d'application
1
2 Références normatives
1
3 Termes et définitions
1
4 Environnement physique et conditions opératoires
2
5 Classification des tores de mesure de courant et désignation du produit
2
5.1 Classe des tores de mesure de courant
2
5.2 Valeurs standards du coefficient de conversion
2
5.3 Désignation du produit
3
6 Exigences relatives aux tores de mesure de courant
3
6.1 Tore de mesure de courant et fil de connexion
3
6.2 Coefficient de conversion
3
6.3 Exactitude de mesurage
4
6.4 Résistance mécanique
4
6.5 Erreur de positionnement
4
6.6 Influence de la température ambiante
4
6.7 Propriétés en température des matériaux de revêtement
4
6.8 Essais
4
7 Modes opératoires d'essai
5
7.1 Coefficient de conversion
5
7.2 Exactitude de mesurage
6
7.3 Essais mécaniques
6
7.4 Essai d'erreur de positionnement
8
7.5 Essai en température
8
7.6 Essai de contact
9
8 Marquage
9
Annexe A (informative) Conception des tores de mesure de courant
10
Annexe B (informative) Paramètres essentiels du coefficient de conversion
13
Annexe C (informative) Types de tore de mesure de courant et leurs caractéristiques spécifiées recommandées
14
Annexe D (informative) Fréquence de réponse du tore de mesure de courant
18

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