IEC 62271-1:2017 PDF Download

IEC 62271-1:2017 is a standard that applies to alternating current (AC) switchgear and controlgear. It is designed for both indoor and outdoor installation and is intended for operation at frequencies up to 60 Hz and rated voltages above 1,000 V. This standard covers all types of high-voltage switchgear and controlgear, except for those specified in other relevant IEC standards.

The second edition of IEC 62271-1:2017 replaces the first edition published in 2007. It includes technical revisions and updates based on changes in ISO/IEC directives and IEEE standards. Notable changes include the introduction of new numbering conventions, updated temperature ranges for normal service conditions of indoor and outdoor switchgear, adoption of altitude correction factors from IEC 60071-2 for altitudes above 1,000 m, and the addition of a new subclause for manual operated actuators.

Other changes in this edition involve adjustments to specific requirements, such as radio interference voltage levels, allowable temperature rises for different parts, and acceptance criteria for X-radiation testing. Some tests were removed due to modifications or withdrawals of relevant test standards in the IEC 60068 series. Additionally, informative annexes providing guidelines for the extension of validity of type tests and exposure to pollution have been added.