求助 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: sch_jack 时间: 2016-1-25 17:00:41