Sel 411L - Table 3.87 OOS Logic Relay Settings

P.3.159
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
Out-of-Step Logic (Conventional)
➤ The minimum separation between settings R1L6 and R1L7 is
0.25/I
NOM
.
➤ The minimum separation between settings X1T6 and X1T7 is
0.25/I
NOM
.
➤ The minimum separation between settings X1B6 and X1B7 is
0.25/I
NOM
.
➤ Setting OSBD must be greater than OSTD by a minimum of
0.5 cycle.
Table 3.87 OOS Logic Relay Settings
Name Description Range
Default
(5 A)
EOOS Out-of-step Y, Y1, N N
OOSB1 Block Zone 1 Y, N Y
OOSB2 Block Zone 2 Y, N Y
OOSB3 Block Zone 3 Y, N Y
OOSB4 Block Zone 4 Y, N N
OOSB5 Block Zone 5 Y, N N
OSBD
a
a
Hidden when EOOS = Y1.
Out-of-step block time delay
(cycles)
0.500–8000 2.000
OSBLTCH
a
Latch out-of-step blocking
b
b
The OSB (Out-of-Step Blocking) logic resets automatically after it asserts for more than
2 seconds. You can latch OSB if the power swing moves outside of Zone 6 before the
2-second timer expires.
Y, N N
EOOST Out-of-step trip delay
c
c
Option I enables tripping on the way into Zone 6; option O enables tripping on the way out of
Zone 6; option N disabled OST (Out-of-Step Trip).
N, I, O, C N
OSTD
a
Out-of-step trip delay (cycles) 0.500–8000 0.500
X1T7
a
Zone 7 reactance—top () (0.25–480)/I
NOM
23.00
X1T6
a
Zone 6 reactance—top () (0.25–480)/I
NOM
21.00
R1R7
a
Zone 7 resistance—right () (0.25–350)/I
NOM
23.00
R1R6
a
Zone 6 resistance—right () (0.25–350)/I
NOM
21.00
X1B7
a,d
d
Advanced Setting if EADVS := Y. If the Advanced Settings are not enabled (setting
EADVS := N), the relay hides the setting.
Zone 7 reactance—bottom () (–0.25 to 480)/I
NOM
–23.00
X1B6
a,d
Zone 6 reactance—bottom () (–0.25 to 480)/I
NOM
–21.00
R1L7
a,d
Zone 7 resistance—left () (–0.25 to 350)/I
NOM
–23.00
R1L6
a,d
Zone 6 resistance—left () (–0.25 to 350)/I
NOM
–21.00
50ABCP
d
Pos.-seq. current supervision (A) (0.20–20) • I
NOM
1.00
50QUBP
a,d
Neg.-seq. current supervision (A) (OFF, 0.10–20) • I
NOM
OFF
UBD
a,d
Neg.-seq. current unblock delay
(cycles)
0.500–120 0.500
UBOSBF
,d
Out-of-step angle unblock rate 1–10 4
OOSPSC No. of pole slips before tripping 1–10 1