Sel 411L - Figure 3.97 OOS Positive-Sequence Measurements; Figure 3.98 OOS Override Logic

P.3.161
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
Out-of-Step Logic (Conventional)
Figure 3.97 OOS Positive-Sequence Measurements
Figure 3.98 OOS Override Logic
UBOSBD
0
(Internal Function)
UBOSB
3φ
Unblock
X1
X1
X1
R1
R1
R1
Zone 6
Zone 7
Im (Z1)
Re (Z1)
Relay
Word
Bits
50ABC
50ABCP
3PO
ILOP
X7ABC
X6ABC
V1
I1L
Z1 =
V1
I1L
|I1L|
+
—
Relay
Word
Bits
Setting
UBD
0
CYC
67QUBF
Relay
Word
Bits
UBD
0
CYC
67QUBR
Relay
Word
Bit
Relay
Word
Bit
32QF
Setting
3I2L
50QUBP
32QR
—
+