
Overhead Electrical Lines Exceeding ac 45 kv Part 2-20: National Normative Aspects (nna) for Estonia (based on en 50341-1:2012)
出版:National Standards Authority of Ireland

专家解读视频
Pertains to all new overhead electric lines with nominal system voltages exceeding AC 1 kV and with rated frequencies below 100 Hz.
EN 50341-2-20:2015 - Identical
EN 50341-2-20 : 2015 - Identical
EN 50341-2-20 : 2015 - Identical