prSSH EN IEC 61439-5:2024

Pjesë për montimin e pajisjeve shpërndarëse dhe të kontrollit të tensionit të ulët - Pjesa 5: Pjesë për montim në rrjeteve publike të shpërndarjes së energjisë

Low-voltage switchgear and controlgear assemblies - Part 5: Assemblies for power distribution in public networks

Scope

<!-- NEW! -->IEC 61439-5:2023 is available as <a href="https://webstore.iec.ch/publication/85236">IEC 61439-5:2023 RLV</a> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.</br></br>IEC 61439-5:2023 defines the specific requirements for public electricity network distribution assemblies (PENDAs). PENDAs have the following criteria:

- used for the distribution of electrical energy in three phase systems for which the rated voltage does not exceed 1 000 V AC (see Figure 101 for a typical distribution network) and DC systems not exceeding 1 500 V DC;

- stationary;

- open type assemblies are not covered by this document;

- suitable for installation in places where only skilled persons have access for their use, however, outdoor types can be installed in situations that are accessible to ordinary persons

- intended for use in energy distribution in public power grids;

- indoor use: assemblies for installation inside of electric power substations;

- outdoor use: assemblies containing an enclosure suitable for open air installation.

This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:

a) omission of the requirement to conduct mechanical tests at -25 °C when enclosures are made of a metallic material;

b) addition of assumed loading factors generation supplies and electric vehicle charging applications;

c) additional dielectric tests when a PENDA is used in a distribution substation with separate HV and LV earths;

d) further clarification of representative samples for design verification.