U.6.32
SEL-421 Relay
User’s Guide
Date Code 20090715
Testing and Troubleshooting
Checking Relay Operation
Figure 6.24
Group 1 Line Configuration Settings:
AC
SEL
ERATOR
QuickSet
Figure 6.25
Directional Settings:
AC
SEL
ERATOR
QuickSet
Table 6.8
Negative-Sequence Directional Element Settings AUTO
Calculations
Setting
Calculation
50FP
0.12 • I
nom
50RP
0.08 • I
nom
Z2F
0.5 • Z1MAG
Z2R
Z2F + 1 / (2 • I
nom
)
a2
0.1
k2
0.2
Summary of Contents for 421
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