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IEC 62271-1 Ed. 2.0 b:2017
M00002859
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IEC 62271-1 Ed. 2.0 b:2017 High-voltage switchgear and controlgear - Part 1: Common specifications for alternating current switchgear and controlgear
standard by International Electrotechnical Commission, 07/12/2017
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This part of IEC 62271 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 1 000 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 and controlgear.
NOTE For the use of this document, high-voltage is defined as the rated voltage above 1 000 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.