R.10.15
Date Code 20111215 Reference Manual SEL-421 Relay
Settings
Group Settings
Selectable Operating Quantity Inverse Time Overcurrent Element 1 Table 10.52
Selectable Operating Quantity Inverse Time Overcurrent Element 2 Table 10.53
Selectable Operating Quantity Inverse Time Overcurrent Element 3 Table 10.54
Zone/Level Direction Table 10.55
Directional Control Element Table 10.56
Pole Open Detection Table 10.57
POTT Trip Scheme Table 10.58
DCUB Trip Scheme Table 10.59
DCB Trip Scheme Table 10.60
Breaker 1 Failure Logic (and Breaker 2 Failure Logic) Table 10.61
Synchronism Check Element Reference Table 10.62
Breaker 1 Synchronism Check Table 10.63
Breaker 2 Synchronism Check Table 10.64
Recloser and Manual Closing Table 10.65
Single-Pole Reclose Settings Table 10.66
Three-Pole Reclose Settings Table 10.67
Voltage Elements Table 10.68
Demand Metering Table 10.69
Trip Logic Table 10.70
Table 10.30 Line Configuration
Default Value
Label Prompt 5 A 1 A
CTRW Current Transformer Ratio—Input W (1–50000) 200 200
CTRX Current Transformer Ratio—Input X (1–50000) 200 200
PTRY Potential Transformer Ratio—Input Y (1–10000) 2000 2000
VNOMY PT Nominal Voltage (L-L)—Input Y
(60–300 V secondary)
115 115
PTRZ Potential Transformer Ratio—Input Z (1–10000) 2000 2000
VNOMZ PT Nominal Voltage (L-L)—Input Z
(60–300 V secondary)
115 115
Z1MAG Positive-Sequence Line Impedance Magnitude 7.80 39.00
(0.05–255 secondary) 5 A
(0.25–1275 secondary) 1 A
Z1ANG Positive-Sequence Line Impedance Angle
(5.00–90 degrees)
84.00 84.00
Z0MAG Zero-Sequence Line Impedance Magnitude 24.80 124.00
(0.05–255 secondary) 5 A
(0.25–1275 secondary) 1 A
Z0ANG Zero-Sequence Line Impedance Angle
(5.00–90 degrees)
81.50 81.50
EFLOC Fault Location (Y, N) Y Y
LL Line Length (0.10–999) 100.00 100.00
Table 10.29 Group Settings Categories (Sheet 2 of 2)
Settings Reference
NOTE: See corresponding command
descriptions SET on page R.9.40 and
SHO on page R.9.44 to set or show
the Group settings.
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