2 Functions
86
7SD610 Manual
C53000-G1176-C145-4
Figure 2-33 Increasing the pickup value
Figure 2-34 Logic diagram of the restricted earth fault protection (simplified)
2.5.3 Setting Notes
General The restricted earth fault protection can only operate if this function has been set
during configuration of the functional scope (Section 2.1.2) under address 141 REF
PROT. on Enabled. Operation requires the address 143 TRANSFORMER to be set on
YES and the address 220 I4 transformer on IY starpoint. The address 221
I4/Iph CT must be set under margin heading „Connection of the Currents“ as de-
scribed in section 2.1.2.1.
The earth fault differential protection can under address 4101 REF PROT. be activat-
ed (ON) or deactivated (OFF).
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