NF C26-231

NF C26-231

March 1974
Standard Current

Methods of testing insulating materials.recommended methods for thedetermination of the dielectric properties of insulating material at frequencies above 300 MHz.

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Main informations

Collections

National standards and national normative documents

Publication date

March 1974

Number of pages

12 p.

Reference

NF C26-231

ICS Codes

29.035.01   Insulating materials in general

Classification index

C26-231

Print number

1 - 01/04/1974

International kinship

IEC 60377-1:1973
Table of contents
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  • AVANT-PROPOS
  • 1 Objet, domaine d'application et validité
  • 1.1 Objet et domaine d'application
  • 1.2 Validité
  • 2 Définitions
  • 2.1 Permittivité relative complexe Epsilonn r*
  • 2.2 Permittivité relative Epsilonn ' r
  • 2.3 Indice de pertes Epsilonn '' r
  • 2.4 Facteur de dissipation diélectrique tg
    8
  • 3 Facteurs influençant les propriétés diélectriques de matériaux isolants
  • 3.1 Fréquence
  • 3.2 Température
  • 3.3 Humidité et autres impuretés
  • 3.4 Structure physique et chimique
  • 3.5 Intensité de champ alternatif
  • 4 Description des méthodes de mesure
  • 4.1 Principe des méthodes de mesure
  • 4.2 Dispositif d'essai
  • 4.3 Choix de la méthode d'essai
  • 5 Mode opératoire
  • 5.1 Préparation des éprouvettes
  • 5.2 Conditionnement
  • 5.3 Mesures
  • 6 Procès-verbal d'essai
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