Factors influencing the accuracy of the sampled values from the merging unit are
for example anti aliasing filters, frequency range, step response, truncating, A/D
conversion inaccuracy, time tagging accuracy etc.
In principle the accuracy of the current and voltage transformers, together with the
merging unit, shall have the same quality as direct input of currents and voltages.
1MRK 506 369-UEN B Section 25
Requirements
Line distance protection REL670 2.2 IEC 889
Application manual
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