Schweitzer Engineering Laboratories SEL-421-4 - Page 518

6.182
SEL-421 Relay Instruction Manual Date Code 20171021
Protection Applications Examples
230 kV Tapped Transmission Line Application Example
Figure 6.54 Protection Freeform SELOGIC Control Equations (Continued)
S
R
PLT01
AND
AND
PST02Q
IN
R
PT
Q
ET
PST04
AND
OR
IN101
PSV01
IN103
IN102
IN101
PSV01
330
IN103
PLT01
IN102
PLT01
PST04Q
IN
PU
DO
Q
PCT01
AND
AND
OR
25AIBK1
IN103
IN103
PLT01
59VS1
240.0
0.0
>
AND
300
PST04ET
PCN02Q
OUT106
IN
PU
DO
Q
PCT02
AND
OR
59VS2
IN101
PLT01
240.0
0.0
IN103
AND
25AIBK2
IN103
IN101
R_TRIG
PST03Q
R_TRIG