IEC 60255-121 : 1ED 2014現行
MEASURING RELAYS AND PROTECTION EQUIPMENT - PART 121: FUNCTIONAL REQUIREMENTS FOR DISTANCE PROTECTION
出版：International Electrotechnical Committee
專家解讀視頻
Defines minimum requirements for functional and performance evaluation of distance protection function typically used in, but not limited to, line applications for effectively earthed, three-phase power systems.
NBN EN 60255-121 : 2014 - Identical
SAC GB/T 14598.121 : 2017 - Identical
BS EN 60255-121 : 2014 - Identical
NEN EN IEC 60255-121 : 2014 - Identical
VDE 0435-3121 : 2015 - Identical
DS EN 60255-121 : 2014 - Identical
PN EN 60255-121 : 2014 - Identical
NF EN 60255-121 : 2014 - Identical
CEI EN 60255-121 : 2014 - Identical
