Schweitzer Engineering Laboratories SEL-311C - Figure 3.5 Zone 2 AB Phase Distance Logic

3.8
SEL-311C Relay Instruction Manual Date Code 20060320
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Distance Elements
Note 1: mAB = A-Phase to B-Phase Distance Calculation, Z2P = Zone 2 Distance Setting.
Note 2: ABC2 and PP2 are compensator distance element calculations.
q From Figure 4.14; w from Figure 4.15; e from Figure 3.18; r from Figure 3.23; t from Figure 4.1.
Figure 3.5 Zone 2 AB Phase Distance Logic
q 32QF
w F32P
(Internal Element)
|IAB|
50PP2
(Advanced Setting)
_
+
MAB2
Zone 2 Phase Distance Logic for AB Phase Pair. BC and CA Logic Is Similar.
See Note 1 mAB < Z2P
VPOLV
t ILOP
FSB
FSA
"C" in E21P
M2P
MBC2
MCA2
Relay
Word
Bits
Relay
Word
Bits
MABC2
MPP2
Relay
Word
Bits
(unless
noted)
e OSB2
a2
(Setting)
r 50Q2
|I2|/|I1|
_
+
UBD
0
q 32QF
w F32P
(Internal Element)
MABC2
Zone 2 Compensator Distance Logic
|IAB|
50PP2
(Setting)
"C" in E21P
(Setting)
VPOLV
t ILOP
|IBC|
|ICA|
See Note 2 ABC2 < 0
(Calc)
See Note 2 PP2 < 0
(Calc)
MPP2
_
+
_
+
_
+
OSB2