IEC 62271-1:2017 pdf download

09-30-2020 comment

IEC 62271-1:2017 pdf free download.High-voltage switchgear and controlgear – Part 1: Common specifications for alternating current switchgear and controlgear.The size of this pdf file is 177M and ths file is larger,so you need more time and more patience to download this IEC pdf file.
IEC 62271-1:2017 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.
IEC 62271-1:2017 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.
Unless otherwise specified, high-voltage switchgear and controlgear, including the operati
devices and the auxiliary equipment which form an integral part of them, are intended to be used in accordance with their rated characteristics and the normal service conditions listed in 4.1.
Operation under normal service conditions is considered to be covered by the type tests ccording to this document and relevant product standard.
When high-voltage switchgear and controlgear is expected to be used under conditions different from the normal service conditions given in 4. 1, the users requirements should refer to standardized steps in 4.2.2 up to 4.2.7 if not provided by product standards.
NOTE 1: Appropriate actions are also taken to ensure proper operation under such conditions of other components, such as relays
NOTE 2: Detailed information concerning classification of environmental conditions is given in EC60721-3-39 (indoor) and EC 60721-3-4 [10](outdoor).
For installations at an altitude higher than 1 000 m, the required insulation withstand level of external insulation at the service location shall be determined according to Clause 4 of IEC 60071-2: 1996. The rated insulation level of the switchgear and controlgear should be equal to or higher than this value, reference is made to IEC TR 62271-306 [4].

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