P54x/EN OP/La4 Operation
(OP) 5-64
MiCOM P543, P544, P545 & P546
OP
Optional features of scheme
A
B
Z
Z
Zone 1
Zone 2
Zone 3
Zone 1
Zone 2
Zone 3
Zone 4
Zone 4
Zone 4
CRx
CRx
CTx
CTx
&
1
1
CB Open
CB Open
&
Zone 4
&
TZ1
TZP
TZ2
TZ3
TZ4
Z1
ZP
Z2
Z3
Z4
1
Trip A
TZ1
TZP
TZ2
TZ3
TZ4
Z1
ZP
Z2
Z3
Z4
1
Trip B
&
&
&
&
&
LD0V
LD0V
P1149ENb
P1134ENa
Figure 38 Permissive overreach transfer trip scheme (POR) (Distance option only)
Detailed logic is shown in Figure 39, as follows:
Not
e: The DDB Any Trip (522) feeds into a 100 ms delay on drop-off timer,
which in turn leads to signal sending. This is a principle similar to the
logic which results in a signal send for weak infeed and breaker open
echoing.
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