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ABB REL 352 Instruction Manual page 36

Numerical phase comparison transmission line protection system

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COMM
COMPARISON
AND
CIN
COUT
(2)
FD2T
FD2
0
150
ARMT
150
CDT
0
(2) These Timers are 20% longer for 50 Hz
SBP
(2)
3
0
25
2
(2)
0
40
(2)
PILOT TRIP
4
0
2
CNT
(2)
1
6
0
Figure 3-7. Pilot Trip Logic
STUB BUS
TRIP
LDT + 8
IL
0
SBT
TRIP OR
PLT
IH
(2)
75
0
IKO
(2)
0
PT
30
(PILOT TRIP)

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