The Institute for Standardization of Bosnia and Herzegovina, through Technical Committee BAS/TC 52, Switchgear and Controlgear Installation, has adopted the third edition of BAS EN 62271-1:2025, High-voltage switchgear and controlgear – Part 1: Common specifications for alternating current switchgear and controlgear, by the translation method. This standard is a translation of the English version of EN 62271-1:2017.

The standard BAS EN 62271-1:2025, which is part of the IEC 62271 series, applies to AC switchgear and controlgear designed for indoor and/or outdoor installation, and for operation at service frequencies up to and including 60 Hz and having rated voltages above 1000 V.

This document applies to all high-voltage switchgear and controlgear except as otherwise specified in the relevant IEC standards for the particular type of switchgear or controlgear.

NOTE: For the use of this document, high-voltage is defined as the rated voltage above 1000 V. However, the term medium voltage is commonly used for distribution systems with voltages above 1 kV and generally applied up to and including 52 kV.

The original text of this standard was prepared by the International Technical Committee IEC/TC 17, High-voltage switchgear and controlgear.