Schweitzer Engineering Laboratories SEL-421-4, Instruction Manual

Page: 557 / 1518

8.21
Date Code 20171021 Instruction Manual SEL-421 Relay
Settings
Group Settings
The number of pickup settings in Table 8.49 is dependent on Group setting
E50P := 1–4. When E50P := N, no settings are made for Table 8.49 through
Table 8.51 .
Make corresponding zone n = 1–4 settings in Table 8.50 and Table 8.51 for any
50P n P settings that are made in Table 8.49 .
NOTE:
If the relay is using a remote
data acquisition system, such as TiDL,
the operating times will be delayed by
1.5 ms. Use caution when setting the
relay coordination times to account
for this added delay.
Table 8.49 Phase Instantaneous Overcurrent Pickup
Setting Prompt
Default Value
Increment
5 A 1 A
50P1P Level 1 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
10.0 2 0.01
50P2P Level 2 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF 0.01
50P3P Level 3 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF 0.01
50P4P Level 4 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF 0.01
Table 8.50 Phase Definite-Time Overcurrent Time Delay
Setting Prompt Default Value Increment
67P1D Level 1 Time Delay (0.000–16000 cycles) 0.000 0.125
67P2D Level 2 Time Delay (0.000–16000 cycles) 0.000 0.125
67P3D Level 3 Time Delay (0.000–16000 cycles) 0.000 0.125
67P4D Level 4 Time Delay (0.000–16000 cycles) 0.000 0.125
Table 8.51 Phase Instantaneous Definite-Time Overcurrent Torque Control
a
a
These settings cannot be set to NA or to logical 0.
Setting Prompt Default Value
67P1TC Level 1 Torque Control (SEL
OGIC
Equation) 1
67P2TC Level 2 Torque Control (SEL
OGIC
Equation) 1
67P3TC Level 3 Torque Control (SEL
OGIC
Equation) 1
67P4TC Level 4 Torque Control (SEL
OGIC
Equation) 1