2 Functions
96
7UM61 Manual
C53000-G1176-C127-3
A drop-out can only be caused by a drop-out of the overcurrent pickup and not by
exiting the tripping polygon.
The following figure shows the logic diagram for the impedance protection.
Figure 2-29 Logic Diagram of the Impedance Protection
2.14.2 Setting Notes
General Machine impedance protection is only effective and available if enabled during config-
uration (Section 2.2, address 133, IMPEDANCE PROT. = Enabled. If the function is
not required Disabled is set. Address 3301 IMPEDANCE PROT. serves to switch
the function ON or OFF or to block only the trip command (Block relay).
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