Sel SEL-421 - SOTF Logic Diagram

R.1.86
SEL-421 Relay Reference Manual Date Code 20111215
Protection Functions
Switch-Onto-Fault Logic
Figure 1.59 SOTF Logic Diagram
52AEND
ESPSTF := Y
0
CLOEND
0
5
CYC
0
0
SOTFD
SOTFE
Reset
0
SOTFD
SPO
3PO
Relay
Word
Bit
52AEND := OFF
Settings
CLOEND := OFF
CLSMON
EVRST := Y
Voltage Healthy
Falling Edge
of SPO
Setting Setting
SELOGIC
Setting
Relay
Word
Bits