Schweitzer Engineering Laboratories SEL-421-4 - Table 8.42 Zero-Sequence Compensation Factor; Table 8.43 Ground-Distance Element Time Delay; Table 8.44 Series Compensation; Table 8.45 Distance Element Common Time Delay

8.18
SEL-421 Relay Instruction Manual Date Code 20171021
Settings
Group Settings
Make Table 8.42 settings when Group setting E21MG := 1–5 or E21XG := 1–5.
The number of pickup settings in Table 8.43 is dependent on Group settings
E21G := 1–5 and E21XG := 1–5, and the settings made from Table 8.40 and
Table 8.41.
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.
Make Table 8.44 settings when Group setting ESERCMP := Y.
NOTE: The SEL-421-4 does not
provide series-compensated line
protection logic. This setting is
available in the SEL-421-5.
Make Table 8.45 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 8.37, Table 8.40 and
Table 8.41.
Table 8.42 Zero-Sequence Compensation Factor
Setting Prompt
Default
Value
Increment
k0M1 Zone 1 Zero-Sequence Compensation Factor Magnitude
(AUTO, 0.000–10)
0.726 0.001
k0A1 Zone 1 Zero-Sequence Compensation Factor Angle
(–180.0 to +180.0 degrees)
–3.69 0.01
k0M
a
a
Setting only available when Group setting EADVS := Y.
Forward Zones Zero-Sequence Compensation Factor
Magnitude (0.000–10)
0.726 0.001
k0A
a
Forward Zones Zero-Sequence Compensation Factor
Angle (–180.0 to +180.0 degrees)
–3.69 0.01
k0MR
a
Reverse Zones Zero-Sequence Compensation Factor
Magnitude (0.000–10)
0.726 0.001
k0AR
a
Reverse Zones Zero-Sequence Compensation Factor
Angle (–180.0 to +180.0 degrees)
–3.69 0.01
Table 8.43 Ground-Distance Element Time Delay
Setting Prompt
Default
Value
Increment
Z1GD Zone 1 Time Delay (OFF, 0.000–16000 cycles) 0.000 0.125
Z2GD Zone 2 Time Delay (OFF, 0.000–16000 cycles) 20.000 0.125
Z3GD Zone 3 Time Delay (OFF, 0.000–16000 cycles) 60.000 0.125
Z4GD Zone 4 Time Delay (OFF, 0.000–16000 cycles) OFF 0.125
Z5GD Zone 5 Time Delay (OFF, 0.000–16000 cycles) OFF 0.125
Table 8.44 Series Compensation
Setting Prompt
Default Value
Increment
5 A 1 A
XC Series Capacitor Reactance
(OFF, 0.05–64  secondary) 5 A
(OFF, 0.25–320  secondary) 1 A
OFF OFF 0.01
Table 8.45 Distance Element Common Time Delay (Sheet 1 of 2)
Setting Prompt
Default
Value
Increment
Z1D Zone 1 Time Delay (OFF, 0.000–16000 cycles) 0.000 0.125
Z2D Zone 2 Time Delay (OFF, 0.000–16000 cycles) 20.000 0.125