Setting Notes - Siemens Siprotec 7UM611 Manual

2 Functions
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

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).
96
Logic Diagram of the Impedance Protection
7UM61 Manual
C53000-G1176-C127-3