Signals - ABB RELION 620 Series Technical Manual

Section 4
Protection functions
4.7.2.6
510
B
-R
GUID-87E27B8C-02D6-4970-AF78-55E6ACB630F0 V1 EN
Figure 243: Example of out of step detection
The shaded region indicates a fault zone in a distance protection function. For curve A, the
impedance moves into the out of step zone and leaves slowly, indicating the occurrence of
a swing that quickly stabilizes. For curve B, the impedance moves slowly into the out of
step zone and exits the zone indicating that the network is becoming unstable. For curve
C, impedance rapidly moves into, and remains in, the fault zone indicating an actual fault
and not an out of step condition.

Signals

Table 370: 78 Input signals
Name Type
V SIGNAL
1
I SIGNAL
1
I SIGNAL
2
DISABLE BOOLEAN
BLOCK BOOLEAN
X
C
-X
Default Description
0.0 Positive phase sequence voltage
0.0 Positive phase sequence current
0.0 Negative phase sequence current
0=False Signal to block the function during starting of motor or
generator
0=False Block signal for activating the blocking mode
1MAC504801-IB E
A
R
620 series ANSI
Technical Manual