Siemens SIPROTEC 7UT613 series Manual page 461

Figure 4-15 Dropout time and trip time characteristics of the inverse time unbalanced load stage, as per IEC
Trip Time Curves acc. to ANSI
7UT613/63x Manual
C53000-G1176-C160-2
One of the tripping curves depicted in the figures 4-16 and 4-17 on the right-hand side may be
selected.
The tripping times for I
/I
2 2p
Pickup Threshold
≥ 20 are identical to those for I
Approx. 1.10· I
4.8 Unbalanced Load Protection
/I = 20.
2 2p
2p
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