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IEC 61557-9:2023 specifies the requirements for the insulation fault location system (IFLS) that localizes insulation faults in any part of the system in unearthed IT AC systems and unearthed IT AC systems with galvanically connected DC circuits having nominal voltages up to 1 000 V AC, as well as in unearthed IT DC systems with voltages up to 1 500 V DC, independent of the measuring principle.…

L'IEC 61557-9:2023 spécifie les exigences applicables aux dispositifs de localisation de défauts d’isolement (DLD) qui, indépendamment du principe de mesure, peuvent localiser les défauts d’isolement des parties de réseaux IT à courant alternatif non mis à la terre et des réseaux IT à courant alternatif non mis à la terre comprenant des circuits à courant continu reliés galvaniquement dont…

IEC 60143-4:2023 specifies the testing of thyristor controlled series capacitor (TCSC) installations used in series with transmission lines. This document also addresses issues that consider ratings for TCSC thyristor valve assemblies, capacitors, and reactors as well as TCSC control characteristics, protective features, cooling system and system operation. IEC 60143-4:2023 cancels and replaces…

L'IEC 60143-4:2023 spécifie les essais à réaliser sur les installations de condensateurs série commandés par thyristors (CSCT) utilisées avec les lignes de transmission. Le présent document aborde également les questions liées aux caractéristiques assignées des assemblages de valve à thyristors pour CSCT, des condensateurs et des bobines d’inductance ainsi que les caractéristiques de…

IEC TS 63471:2023 provides a recommended DC voltage series for HVDC grids with a DC voltage above 1,5 kV. It concerns the selection of a nominal DC voltage of multi-terminal HVDC power transmission and distribution systems and meshed HVDC networks, grids, rather than a rated DC voltage or highest DC voltage. There is no stringent requirement to consider this DC voltage series for the DC voltage…

IEC TR 63401-3:2023, which is a Technical Report, provides an insight into the various forms of fast frequency response and frequency ride-through techniques that involve inverter-based generation sources (mainly wind and PV) in a bulk electrical system. This document first focuses on extracting the clear definition of FFR from different references around the world, while studying the mechanism…

IEC 60704-2-2:2023 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 60704-2-2:2023 EXV includes the content of the references made to IEC 60704-1:2021. IEC 60704-2-2:2023 applies to electric fan heaters, designed for…

IEC 60335-2-51:2023 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 60335-2-51:2023 EXV includes the content of the references made to IEC 60335-1:2020. IEC 60335-2-51:2023 deals with the safety of electric…

IEC 60335-2-60:2023 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 60335-2-60:2023 EXV includes the content of the references made to IEC 60335-1:2020. IEC 60335-2-60:2023 deals with the safety of electric…

IEC 60335-2-65:2023 EXV contains both the international standard and its extended version (EXV). This extended version of the official IEC Standard is available in English only and provides the user with a comprehensive content of the Standard. IEC 60335-2-65:2023 EXV includes the content of the references made to IEC 60335-1:2020. IEC 60335-2-65:2023 deals with the safety of electric air-…