direction of the directional functionality. The double arrows define the non-
directional functionality where faults can be detected in both directions.
GUID-276A9D62-BD74-4335-8F20-EC1731B58889 V1 EN
Figure 134: Closed ring network topology where feeding lines are protected with
directional overcurrent protection relays
4.1.2.8 Signals
Table 244: FDPHLPDOC Input signals
Name
Type Default Description
I_A SIGNAL 0 Phase A current
I_B SIGNAL 0 Phase B current
I_C SIGNAL 0 Phase C current
I
2
SIGNAL 0 Negative phase sequence current
U_A_AB SIGNAL 0 Phase-to-earth voltage A or phase-to-phase
voltage AB
U_B_BC SIGNAL 0 Phase-to-earth voltage B or phase-to-phase
voltage BC
U_C_CA SIGNAL 0 Phase-to-earth voltage C or phase-to-phase
voltage CA
U
1
SIGNAL 0 Positive phase sequence voltage
U
2
SIGNAL 0 Negative phase sequence voltage
Table continues on next page
Section 4 1MRS758755 A
Protection functions
240 REC615 and RER615
Technical Manual
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