Sel SEL-421 - Negative-Sequence Overcurrent Element Settings; Residual Ground Overcurrent Element Settings

R.1.65
Date Code 20111215 Reference Manual SEL-421 Relay
Protection Functions
Instantaneous Line Overcurrent Elements
Table 1.51 Negative-Sequence Overcurrent Element Settings
Setting Description Range
Default
(5 A)
Negative-Sequence Instantaneous Overcurrent Elements
E50Q Neg.-Seq. Inst./Def.-Time
O/C Elements
N, 1–4 N
50Q1P Level 1 Pickup (A) OFF, (0.05–20) • I
nom
OFF
50Q2P Level 2 Pickup (A) OFF, (0.05–20) • I
nom
OFF
50Q3P Level 3 Pickup (A) OFF, (0.05–20) • I
nom
OFF
50Q4P Level 4 Pickup (A) OFF, (0.05–20) • I
nom
OFF
Negative-Sequence Definite-Time Overcurrent Elements
67Q1D Level 1 Time Delay (cycles) 0.000–16000 0.000
67Q2D Level 2 Time Delay (cycles) 0.000–16000 0.000
67Q3D Level 3 Time Delay (cycles) 0.000–16000 0.000
67Q4D Level 4 Time Delay (cycles) 0.000–16000 0.000
67Q1TC Level 1 Torque Control SEL
OGIC Equation 1
67Q2TC Level 2 Torque Control SEL
OGIC Equation 1
67Q3TC Level 3 Torque Control SEL
OGIC Equation 1
67Q4TC Level 4 Torque Control SEL
OGIC Equation 1
Table 1.52 Residual Ground Overcurrent Element Settings
Setting Description Range
Default
(5 A)
Residual Ground Instantaneous Overcurrent Elements
E50G Residual Ground Inst./Def.-Time
O/C Elements
N, 1–4 N
50G1P Level 1 Pickup (A) OFF, (0.05–20) • I
nom
OFF
50G2P Level 2 Pickup (A) OFF, (0.05–20) • I
nom
OFF
50G3P Level 3 Pickup (A) OFF, (0.05–20) • I
nom
OFF
50G4P Level 4 Pickup (A) OFF, (0.05–20) • I
nom
OFF
Residual Ground Definite-Time Overcurrent Elements
67G1D Level 1 Time Delay (cycles) 0.000–16000 0.000
67G2D Level 2 Time Delay (cycles) 0.000–16000 0.000
67G3D Level 3 Time Delay (cycles) 0.000–16000 0.000
67G4D Level 4 Time Delay (cycles) 0.000–16000 0.000
67G1TC Level 1 Torque Control SEL
OGIC Equation 1
67G2TC Level 2 Torque Control SEL
OGIC Equation 1
67G3TC Level 3 Torque Control SEL
OGIC Equation 1
67G4TC Level 4 Torque Control SEL
OGIC Equation 1