Médecine bucco-dentaire — Instruments d'endodontie — Partie 1: Exigences générales
Le présent document spécifie les exigences générales et les méthodes d'essai relatives aux instruments d'endodontie utilisés en endodontie, par exemple les élargisseurs, les compacteurs, les instruments auxiliaires, les instruments de mise en forme et de nettoyage et le système de codification numérique. En outre, il couvre les désignations générales de dimensions, le code de couleurs,…
Dentistry — Endodontic instruments — Part 1: General requirements
This document specifies general requirements and test methods for endodontic instruments used for endodontic purposes, e.g. enlargers, compactors, accessory instruments, shaping and cleaning instruments, and a numeric coding system. In addition, it covers general size designations, color-coding, packaging, and identification symbols.
Railway applications - Fixed installations - Electronic power converters for substations
IEC 62590:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC 62590:2019 specifies the requirements for the performance of all fixed installations electronic power converters,…
Environmental testing - Part 3-3: Supporting documentation and guidance - Seismic test methods for e...
IEC 60068-3-3:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
IEC 60068-3-3:2019 applies primarily to electro-technical equipment but its application can be extended to other…
Power losses in voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) system...
IEC 62751-2:2014+A1:2019 gives the detailed method to be adopted for calculating the power losses in the valves for an HVDC system based on the "modular multi-level converter", where each valve in the converter consists of a number of self-contained, two-terminal controllable voltage sources connected in series. It is applicable both for the cases where each modular cell uses only a…
Pertes de puissance dans les valves à convertisseur de source de tension (VSC) des systèmes en coura...
L'IEC 62571-2:2014+A1:2019 donne la méthode détaillée à adopter pour calculer les pertes de puissance dans les valves d'un système CCHT doté d'un "convertisseur multiniveaux modulaire" dont chaque valve est composée d'un certain nombre de sources de tension indépendantes commandables à deux bornes connectées en série. Elle s'applique lorsque chaque cellule…
Flexible cellular polymeric materials — Polyurethane foam for laminate use — Specification
This document specifies the minimum requirements for flexible polyurethane foams up to and including 20 mm thick intended for combination with suitable substrates such as non-woven, woven or knitted fabrics, to form a laminate.
Three types of flexible polyurethane foam are specified as follows:
— type 1: polyether;
— type 2: polyester with minimum elongation at break of 200…
