scope:

This part of IEC 62271 applies to a.c. switchgear and controlgear designed for indoor and / or outdoor installation and for operation at service frequencies up to and including 60 Hz on systems having rated voltages above 1 000 V. This standard 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 standard, high voltage (see IEC 50060-601: 601-01-27) is defined as the rated voltage above 1 000 V. However, the term medium voltage (see IEC 50060-601: 601-01-28) is commonly used for distribution systems with voltages above 1 kV and generally applied up to and including 52 kV.