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Publication date

July 2003

Number of pages

35 p.

Reference

UTE C15-500

ICS Codes

29.060.01 Electrical wires and cables in general

91.140.50 Electricity supply systems

Classification index

C15-500U

Print number

1 - 06/08/2003

European kinship

R064-003

Replaced standards (1)

UTE C15-500

May 1997

Reference document Cancelled

Guide for determination of cross-sectional area of conductors and selection of protective devices.

Standard replaced by (1)

AFNOR C15-500

July 2015

Reference document Cancelled

Determination of cross-sectional area of conductors and selection of protective devices with softwares

Table of contents

0 INTRODUCTION
5
1 DOMAINE D'APPLICATION
5
2 DOCUMENTS DE REFERENCE
6
3 SYMBOLES
7
4 PARAMETRES
10
4.1 Résistances linéiques des conducteurs
11
4.2 Réactances linéiques des conducteurs
11
5 CARACTERISTIQUES DES INSTALLATIONS
12
6 CARACTERISTIQUES DE LA SOURCE D'ALIMENTATION
14
6.1 Tension
14
6.2 Alimentation par des transformateurs HTIBT
14
6.3 Alimentation par des générateurs
15
6.4 Alimentation basse tension
16
7 CARACTERISTIQUES DES DISPOSITIFS DE PROTECTION
16
7.1 Disjoncteurs
16
7.2 Fusibles
16
8 DETERMINATION DU COURANT ADMISSIBLE
17
8.1 Courants d'emploi
17
8.2 Courants admissibles
17
8.3 Méthodes de pose
17
9 DETERMINATION DU POUVOIR DE COUPURE DES DISPOSITIFS DE PROTECTION
18
9.1 Courant de court-circuit triphasé maximal
18
9.2 Courant de court-circuit biphasé maximal
19
9.3 Courant de court-circuit monophasé maximal
20
10 TENUE AUX EFFORTS ELECTRODYNAMIQUES DES CANALISATIONS PREFABRIQUEES
21
11 PROTECTION CONTRE LES CONTACTS INDIRECTS (SCHEMAS TN et IT)
22
11.1 Temps de coupure
22
11.2 Calcul du courant de défaut If
22
12 VERIFICATION DES CONTRAINTES THERMIQUES DES CONDUCTEURS
23
12.1 Contraintes thermiques
23
12.2 Courant de court-circuit minimal
24
12.3 Calcul du courant de court-circuit minimal
24
13 CHUTES DE TENSION
26
13.1 Les chutes de tension sont calculées à l'aide des formules suivantes :
26
13.2 La chute de tension relative (en pour cent) est égale à :
27
Annexe A - Procédure pour l'attribution d'avis techniques relatifs aux programmes de calcul informatisés des sections de conducteurs
28

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