Figure 573: Short circuit current waveform, fault occurs at time 0 seconds (Current
setting limit is multiplied by the square root of 2)
The phase voltage in a three-phase short circuit when a fault occurs at time = 0 s is
shown in
Figure 574
. The voltage drop caused by a three-phase fault provides more
time for determining the fault by means of an underimpedance protection.
Protection functions
1MRS759142 F
1032 REX640
Technical Manual
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