Sel SEL-421 - Zero-Sequence Compensation Factor; Ground Distance Element Time Delay; Distance Element Common Time Delay

R.10.19
Date Code 20111215 Reference Manual SEL-421 Relay
Settings
Group Settings
Make Table 10.37 settings when Group setting E21MG := 1–5 or
E21XG := 1–5.
The number of pickup settings in Table 10.38 is dependent on Group settings
E21G := 1–5 and E21XG := 1–5, and the settings made from Table 10.35 and
Table 10.36.
Make Table 10.39 settings only when Group setting ECDTD := Y; the number
of settings is dependent on Group settings E21P := 1–5, E21G := 1–5, and
E21XG := 1–5, and the settings made from Table 10.32, Table 10.35 and
Table 10.36.
Table 10.37 Zero-Sequence Compensation Factor
Label Prompt Default Value
k0M1 Zone 1 Zero-Sequence Compensation Factor
Magnitude (AUTO, 0.000–10)
0.726
k0A1 Zone 1 Zero-Sequence Compensation Factor Angle
(–180.0 to +180.0 degrees)
–3.69
k0M
a
a
Make setting only when Group setting EADVS := Y.
Forward Zones Zero-Sequence Compensation Factor
Magnitude (0.000–10)
0.726
k0A
a
Forward Zones Zero-Sequence Compensation Factor
Angle (–180.0 to +180.0 degrees)
–3.69
k0MR
a
Reverse Zones Zero-Sequence Compensation Factor
Magnitude (0.000–10)
0.726
k0AR
a
Reverse Zones Zero-Sequence Compensation Factor
Angle (–180.0 to +180.0 degrees)
–3.69
Table 10.38 Ground Distance Element Time Delay
Label Prompt Default Value
Z1GD Zone 1 Time Delay (OFF, 0.000–16000 cycles) 0.000
Z2GD Zone 2 Time Delay (OFF, 0.000–16000 cycles) 20.000
Z3GD Zone 3 Time Delay (OFF, 0.000–16000 cycles) 60.000
Z4GD Zone 4 Time Delay (OFF, 0.000–16000 cycles) OFF
Z5GD Zone 5 Time Delay (OFF, 0.000–16000 cycles) OFF
Table 10.39 Distance Element Common Time Delay
Label Prompt Default Value
Z1D Zone 1 Time Delay (OFF, 0.000–16000 cycles) 0.000
Z2D Zone 2 Time Delay (OFF, 0.000–16000 cycles) 20.000
Z3D Zone 3 Time Delay (OFF, 0.000–16000 cycles) 60.000
Z4D Zone 4 Time Delay (OFF, 0.000–16000 cycles) OFF
Z5D Zone 5 Time Delay (OFF, 0.000–16000 cycles) OFF