BS PD IEC TR 62271-307-2015 High-voltage switchgear
and controlgear
Part 307: Guidance for the extension of
validity of type tests of AC metal and
solid-insulation enclosed switchgear and
controlgear for rated voltages above
1 kV and up to and including 52 kV作者: admin 时间: 2016-1-26 16:35:28