GE MiCOM P40

If DT Start by Prot is disabled, the circuit breaker must be open for the dead time to start. For three-phase tripping
applications, there is an option to check that the line is dead (3PDTStart WhenLD) before starting the dead time. To
check that the line is dead, set 3PDTStart WhenLD to enabled. To check that the circuit breaker is open, set
DTStart by CB Op to Enabled.
5.12.1 DEAD TIME START ENABLE LOGIC DIAGRAM
V03338
DT Start by Prot
Protection Reset
Protection Op
Disable
1
&
DTOK All
&
AR Start
&
R
Q
S
1
OKTimeSP
OK Time 3P
ARIP
1
CB1 AR Init
CB2 AR Init 0.02
0
&
R
Q
S
0
t
Dead Line
DeadLineLockout
1
3PDTStart WhenLD
Enabled
Disabled
1
&
&
&
1
Protection Reset
DT Start by Prot
Disable
CB1 AR 1p InProg
CB2 AR 1p InProg
Enabled
DTStart by CB Op
Disabled
&
1
CB1OP1P
CB2OPAny
CB1 Open 3 ph
CB2 Open 3 ph
CB2OP1P
CB1OPAny
CB1 Open 3 ph
CB2 Open 3 ph
&
1
1
CB2 Only
Num CBs
CB1 Only
1
&
&
1
&
1
1
1
1
DTOK CB1L 1P
DTOK CB1L 3P
DTOK CB2L 1P
DTOK CB2L 3P
Dead Line Time
Figure 168: Dead time Start Enable logic diagram (Module 22)
Chapter 11 - Autoreclose P446SV
308 P446SV-TM-EN-1