Schweitzer Engineering Laboratories SEL-311L, Instruction Manual, Page: 92 / 734

3-38 Line Current Differential, Distance, Out-of-Step, Overcurrent, Date Code 20011112
Voltage, Synchronism Check, and Frequency Elements
SEL-311L Instruction Manual
From Figure 4.14 32QF
|IAB|
50PP2
(Advanced Setting)
See Note 1 mAB < Z2P
_
+
Relay
Word
Bits
MAB2
M2P
MBC2
MCA2
Zone 2 Phase Distance Logic for AB Phase Pair.
BC and CA Logic Is Similar.
Note 1: mAB = A-Phase to B-Phase Distance Calculation
Z2P = Zone 2 Distance Setting
VPOLV
From Figure 4.1 ILOP
FSB
FSA
From Figure 4.15 F32P
(Internal Element)
Relay
Word
Bits
DWG: M311L117
From Figure 4.14 32QF
From Figure 4.15 F32P
(Internal Element)
MABC2
Zone 2 Compensator Distance Logic
Note 2: ABC2 and PP2 are compensator distance element calculations.
|IAB|
50PP2
(Setting)
"C" in E21P
(Setting)
VPOLV
From Figure 4.1 ILOP
|IBC|
|ICA|
See Note 2 ABC2 < 0
(Calc)
See Note 2 PP2 < 0
(Calc)
MPP2
_
+
_
+
_
+
"C" in E21P
MABC2
MPP2
Relay
Word
Bits
(unless
noted)
From Figure 3.41 OSB2
a2
(Setting)
From Figure 3.46 50Q2
|I2|/|I1|
_
+
UBD
0
OSB2
Figure 3.30: Zone 2 AB Phase Distance Logic