Schweitzer Engineering Laboratories SEL-421-4 - Table 3.3 Negative-Sequence Directional Element Settings AUTO Calculations; Figure 3.14 Directional Settings: Quickset

3.17
Date Code 20171021 Instruction Manual SEL-421 Relay
Testing
Checking Relay Operation
Step 3. Upload the new settings to the SEL-421.
a. Click File > Send.
QuickSet prompts you for the settings class you want to send to
the relay, as shown in the Select Groups dialog box in
Figure 3.15.
b. Click the check box for Group 1 and for Breaker Monitor.
c. Click OK.
d. QuickSet responds with a Transfer Status dialog box as in
Figure 3.15.
If you see no error message, the new settings are loaded in the
relay.
Figure 3.14 Directional Settings: QuickSet
Table 3.3 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