Schweitzer Engineering Laboratories SEL-311L Instruction Manual page 91

Mho Phase Distance Elements
Relay
Word
Bits
(unless
noted)
From Figure 4.14 32QF
From Figure 4.15 F32P
(Internal Element)
|IAB|
50PP1
(Setting)
See Note 1 mAB < Z1P • X1
"C" in E21P
From Figure 3.41 OSB1
|I2|/|I1|
a2
(Setting)
From Figure 3.46 50Q1
VPOLV
From Figure 4.2 CVTBL
From Figure 4.1 ILOP
FSA
FSB
VPOLV
OSB1
From Figure 4.15 F32P
(Internal Element)
|IAB|
50PP1
(Setting)
|IBC|
|ICA|
See Note 2 ABC1 < 0
(Calc)
"C" in E21P
(Setting)
See Note 2 PP1 < 0
(Calc)
From Figure 4.14 32QF
From Figure 4.1 ILOP
From Figure 4.2 CVTBL
DWG: M311L116
Figure 3.29: Zone 1 AB Phase Distance Logic
Date Code 20011112
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Line Current Differential, Distance, Out-of-Step, Overcurrent,
Voltage, Synchronism Check, and Frequency Elements
SEL-311L Instruction Manual
UBD
0
Zone 1 Phase Distance Logic for AB Phase Pair. BC and CA Logic Is Similar.
Note 1: mAB = A-Phase to B-Phase Distance Calculation
Z1P = Zone 1 Distance Setting
X1 = Zone 1 Extension from Figure 3.38
Zone 1 Compensator Distance Logic
Note 2: ABC1 and PP1 are compensator distance element calculations.
Zone 1 extension, if active, is included in this calculation.
Relay
Word
Bits
MAB1
Relay
Word
Bits
MBC1
MCA1 M1P
MABC1
MPP1
MABC1
MPP1
3-37