Sel 411L - Figure 3.134 Zone 1 AB Loop Conventional Quadrilateral Phase-Distance Element Logic; Figure 3.135 Zone 2 AB Loop Conventional Quadrilateral Phase Distance Element Logic

P.3.196
SEL-411L Relay Protection Manual Date Code 20151029
Protection Functions
Quadrilateral Phase Distance Elements
Figure 3.134 shows the logic of the Zone 1 conventional quadrilateral phase
distance element for the AB loop. Fault calculations for BC and CA faults
have similar logics.
Figure 3.134 Zone 1 AB Loop Conventional Quadrilateral Phase-Distance
Element Logic
Figure 3.135 shows the logic of the Zone 2 quadrilateral phase distance
element for the AB loop. Fault calculations for BC and CA faults have similar
logics.
Figure 3.135 Zone 2 AB Loop Conventional Quadrilateral Phase Distance
Element Logic
IABLFM
0.1 • I
NOM
F32P
CVTBL
XAB1
RABX1
OSB1
67Q1T
FSA
FSB
HSDAGF
HSDBGF
SERCAB
ILOP
SPO
MABDF
xABF
XP1
(setting)
Phase Selection
VPOLV
ENX2AB
32QE
IABLFM
0.1 • I
NOM
XAB2
RABX2
OSB2
67QUBF
FSA
FSB
HSDAGF
HSDBGF
ILOP
SPO
MABDF
xABF
XP2
(setting)
VPOLV
Phase Selection
ENX2AB
32QE