Part 121: Functional requirements for distance protection
(IEC 60255-121:2014); German version EN 60255-121:2014 Class/Status:
VDE Art. No.: 0400115
This part of IEC 60255 specifies 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. This standard also defines how to document and publish performance tests.
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