GUID-FA46F951-B376-4BC7-BCF4-F970C876CA7A-ANSI V1 EN
Figure 125: Closed ring network topology where feeding lines are protected with
directional overcurrent protection relays
4.1.2.8 Signals
Table 242: 67/51P 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
V_A_AB SIGNAL 0 Phase to ground voltage A or phase to phase voltage AB
V_B_BC SIGNAL 0 Phase to ground voltage B or phase to phase voltage BC
V_C_CA SIGNAL 0 Phase to ground voltage C or phase to phase voltage
CA
V
1
SIGNAL 0 Positive phase sequence voltage
V
2
SIGNAL 0 Negative phase sequence voltage
BLOCK BOOLEAN 0=False Block signal for activating the blocking mode
ENA_MULT BOOLEAN 0=False Enable signal for current multiplier
NON_DIR BOOLEAN 0=False Forces protection to non-directional
Section 4 1MAC059074-MB A
Protection functions
250 615 series ANSI
Technical Manual
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