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SE CO NDAR Y T E ST ING O F PR OT E CT IO N R E LAYS
The maximal low level output from
•
CM430 + LLX1 is 48 V
•
CMC tester (for example CMC 850; CMC 356; CMC 256plus; CMC 353 + CMLIB REF6xx)
is 7.07 Vrms. Two dynamic amplitude range modes (normal = default and high) can be
selected for Rogowski coil simulation. In Normal, the dynamic range amplitude is lim-
ited to 5.9 x 150 mV when harmonics up to 400 Hz are considered (5.9 x 400 / 50 x
0.15 = 7.08). The high mode permits amplitudes of up to 37 x 150 mV and is permitted
via Windows registry settings (details can be found in Omicron technical documenta-
tion).
An alternative solution for pure 50 or 60 Hz sine wave simulation is to define a linear
current sensor instead of the Rogowski current sensor. Low level output signals up to
7.07 Vrms are then available.
– 80 A / 0.150 V
Figure 107: Linear current sensor instead of the Rogowski setting in the Omicron tester
1 VLG 500 0 17 C
maximal simulated current is 3 770 A, 50 / 60 Hz
SE CO NDAR Y T ES T S ETU P S
6 9
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