GUID-FE70BAC9-44A6-4390-9A96-6C0D0CF297CC V1 EN
Figure 354: Short-circuit voltage waveform, fault occurs at time 0 seconds
In a typical impedance trajectory during a short circuit, the fault impedance remains inside
the impedance circle for a longer time, in which case the underimpedance protection
provides longer tripping delay times to maintain the time selectivity.
Section 4 1MAC059074-MB A
Protection functions
712 615 series ANSI
Technical Manual
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