ABB REL300 Instruction Manual page 79

I.L. 40-385.7
Sub 1
9654A18
Figure 3-11 Loss of Potential Logic (System Diagram).
LOI Target
I
OM
AND
10 SEC
To Failure Alarm
V
23 0.5 SEC
0
OUT
LOIB (YES)
JMP4
0
TRIP
AND
50
IN
Sub 1
9662A62
Figure 3-12 AC Current Monitoring Logic.
3-35