Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 3-2...
IEC 61755-3-2:2024 defines the dimensional limits of the optical interface that are necessary for single-mode fibre optic connectors with 2,5 mm or 1,25 mm diameter cylindrical zirconia (ZrO2) ferrules polished at an 8° angle to meet the specific requirements for fibre-to-fibre interconnection, as defined in IEC 61755-2-2. Ferrules made from the material specified in this standard are suitable…
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques de connecteurs ...
IEC 61755-3-2:2024 spécifie les limites dimensionnelles des interfaces optiques à respecter pour que les connecteurs optiques à fibres unimodales équipés de ferrules cylindriques en zircone (ZrO2) polies à un angle de 8°, d’un diamètre de 2,5 mm ou 1,25 mm répondent aux exigences particulières d’une interconnexion fibre à fibre telles que définies dans l’IEC 61755-2-2. Les ferrules constituées du…
Guideline for the system design of HVDC converter stations with line-commutated converters
IEC TR 63127:2019+AMD1:2024 CSV focuses on the system design of converter stations. It is applicable to point-to-point and back-to-back HVDC systems based on line-commutated converter (LCC) technology. This document provides guidance and supporting information on the procedure for system design and the technical issues involved in the system design of HVDC transmission projects for both…
Cuir — Essais de solidité des coloris — Solidité des coloris au dégorgement par frottement
Le présent document spécifie une méthode pour déterminer la quantité de couleur transférée de la surface d’un cuir coloré à d’autres surfaces, par frottement.
Deux essais sont réalisés: l’un avec une étoffe de frottement à sec et l’autre avec une étoffe de frottement humide.
Cette méthode s’applique à tous les types de cuir coloré. Étant donné que les post-traitements du cuir ainsi que les…
Leather — Tests for colour fastness — Colour fastness to crocking
This document specifies a method to determine the amount of colour transferred from the surface of coloured leather to other surfaces by rubbing.
Two tests are carried out, one with a dry rubbing cloth and one with a wet rubbing cloth.
The method is applicable to all types of coloured leather. Since after‑treatments of the leather as well as surface finishes can affect the degree of colour…
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-12: Particula...
IEC 61558-2-12:2024 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 61558-2-12:2024 deals with the safety of constant voltage transformers for general applications and power…
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-12: Particula...
IEC 61558-2-12:2024 is available as IEC 61558-2-12:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61558-2-12:2024 deals with the safety of constant voltage transformers for general applications and power supply units for constant voltage for general applications. Constant voltage…
