Sel SEL-421 - Phase Instantaneous Overcurrent Pickup; Phase Definite-Time Overcurrent Time Delay; Phase Instantaneous Definite-Time Overcurrent Torque Control; Residual Ground Instantaneous Overcurrent Pickup

R.10.22
SEL-421 Relay Reference Manual Date Code 20111215
Settings
Group Settings
Make corresponding zone n = 1–4 settings in Table 10.44 and Table 10.45 for
any 50PnP settings that are made in Table 10.43.
The number of pickup settings in Table 10.46 is dependent on Group setting
E50G := 1–4. When E50G := N, no settings are made for Table 10.46 through
Table 10.48.
Table 10.43 Phase Instantaneous Overcurrent Pickup
Label Prompt Default Value
50P1P Level 1 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
10.0 2
50P2P Level 2 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF
50P3P Level 3 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF
50P4P Level 4 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF
Table 10.44 Phase Definite-Time Overcurrent Time Delay
Label Prompt Default Value
67P1D Level 1 Time Delay (0.000–16000 cycles) 0.000
67P2D Level 2 Time Delay (0.000–16000 cycles) 0.000
67P3D Level 3 Time Delay (0.000–16000 cycles) 0.000
67P4D Level 4 Time Delay (0.000–16000 cycles) 0.000
Table 10.45 Phase Instantaneous Definite-Time Overcurrent Torque Control
a
a
These settings cannot be set to NA or to logical 0.
Label Prompt Default Value
67P1TC Level 1 Torque Control (SELOGIC 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
Table 10.46 Residual Ground Instantaneous Overcurrent Pickup
(Sheet 1 of 2)
Default Value
Label Prompt 5 A 1 A
50G1P Level 1 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF
50G2P Level 2 Pickup
(OFF, 0.25–100 A secondary) 5 A
(OFF, 0.05–20 A secondary) 1 A
OFF OFF