Rechercher

l’IEC 61935-1-2:2018 spécifie les procédures de mesure de référence supplémentaires pour le mesurage de l’asymétrie de résistance avec des instruments d’essai sur site et les exigences relatives à l’exactitude des contrôleurs sur site pour mesurer l’asymétrie de résistance conformément aux exigences de l'ISO/IEC 11801-1.

IEC 61439-7:2018 defines the specific requirements of assemblies as follows: - assemblies for which the rated voltage does not exceed 1 000 V in the case of AC or 1 500 V in the case of DC; – assemblies intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electric energy consuming equipment; – assemblies…

IEC TS 63042-301:2018(E) applies to on-site acceptance tests of electrical equipment with the highest voltages of AC transmission system exceeding 800 kV.

1 Scope This Standard applies to indoor substations, generating stations, and fenced outdoor supply stations and substations (including supply substations on customer premises). For the purpose of interpreting this Standard, an electrical power installation is considered to be one of the following: a) a substation, i.e., a closed electrical operating area in a transmission or distribution…

1 Scope 1.1 This Standard specifies photometric performance requirements for luminaires that are used for roadway and street lighting applications as a function of unit power density (UPD). 1.2 The following light sources are addressed in this Standard: a) clear HPS lamp b) clear metal halide lamp and c) LED. 1.3 This Standard is based on a) average luminance, luminance uniformity…

1.1 This Standard provides the physical property requirements and test methods to determine the material properties for medium density closed cell spray-applied rigid polyurethane foam, used for thermal insulation or for other purposes in building and non-building applications in both site-built construction and prefabrication (manufacturing) facilities. 1.2 The spray polyurethane foam system…

This document provides guidance on the principles behind, and main methods for, the evaluation of sites, soils and soil materials in relation to their role as a source of contamination of groundwater and their function in retaining, releasing and transforming contaminants. It is focused on contaminated land management identifying and listing relevant monitoring strategies, methods for sampling,…

Le présent document fournit des recommandations relatives aux principes sous-jacents et aux principales méthodes régissant l'évaluation des sites, des sols et des matériaux du sol, à leur rôle en tant que source de pollution des eaux souterraines et à leur fonction de rétention, d'émission et de transformation des polluants. Il est axé sur la gestion des sites et sols pollués ainsi que…

L'IEC 60793-1-32:2018 est destinée principalement aux essais des fibres, dès leur production par un fabricant de fibres, ou après revêtement ultérieur (revêtement protecteur serré) au moyen de divers polymères. L'essai peut être effectué sur des fibres issues de production, ou bien après exposition à divers environnements. Le présent essai s'applique aux fibres de types A1, A2, A3…

This document specifies the requirements and performance test procedures for monostatic heterodyne continuous-wave (CW) Doppler lidar techniques and presents their advantages and limitations. The term "Doppler lidar" used in this document applies solely to monostatic heterodyne CW lidar systems retrieving wind measurements from the scattering of laser light by aerosols in the atmosphere…