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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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