Sel SEL-421 - Switch-Onto-Fault Scheme; Out-Of-Step Tripping;Blocking

R.10.20
SEL-421 Relay Reference Manual Date Code 20111215
Settings
Group Settings
Make Table 10.40 settings when Group setting ESOTF := Y.
Make Table 10.41 settings only when Group setting EOOS := Y; the number
of settings is dependent on Group settings E21P := 1–5 and E21G := 1–5.
Table 10.40 Switch-Onto-Fault Scheme
Label Prompt Default Value
ESPSTF Single-Pole Switch-Onto-Fault (Y, N) N
EVRST Switch-Onto-Fault Voltage Reset (Y, N) N
52AEND 52A Pole Open Time Delay
(OFF, 0.000–16000 cycles)
10.000
CLOEND CLSMON or Single Pole Open Delay
(OFF, 0.000–16000 cycles)
OFF
SOTFD Switch-Onto-Fault Enable Duration
(0.500–16000 cycles)
10.000
CLSMON Close Signal Monitor (SEL
OGIC Equation) NA
Table 10.41 Out-of-Step Tripping/Blocking (Sheet 1 of 2)
Default Value
Label Prompt 5 A 1 A
OOSB1 Block Zone 1 (Y, N) Y Y
OOSB2 Block Zone 2 (Y, N) Y Y
OOSB3 Block Zone 3 (Y, N) Y Y
OOSB4 Block Zone 4 (Y, N) N N
OOSB5 Block Zone 5 (Y, N) N N
OSBD Out-of-Step Block Time Delay (0.500–8000 cycles) 2.000 2.000
OSBLTCH Latch Out-of-Step Blocking (Y, N) N N
EOOST Out-of-Step Tripping (N, I, O) N N
OSTD Out-of-Step Trip Delay (0.500–8000 cycles) 0.500 0.500
X1T7 Zone 7 Reactance—Top
(0.05 to 96  secondary) 5 A
(0.25 to 480  secondary) 1 A
23.0 115
X1T6 Zone 6 Reactance—Top
(0.05 to 96  secondary) 5 A
(0.25 to 480  secondary) 1 A
21.0 105
R1R7 Zone 7 Resistance—Right
(0.05 to 70  secondary) 5 A
(0.25 to 350  secondary) 1 A
23.0 115
R1R6 Zone 6 Resistance—Right
(0.05 to 70  secondary) 5 A
(0.25 to 350  secondary) 1 A
21.0 105
X1B7
a
Zone 7 Reactance—Bottom
(–0.05 to–96  secondary) 5 A
(–0.25 to–480  secondary) 1 A
–23.0 –115
X1B6
a
Zone 6 Reactance—Bottom
(–0.05 to–96  secondary) 5 A
(–0.25 to–480  secondary) 1 A
–21.0 –105