E03502
Selectable features
&
Zone 4
Zone 2
Zone 3
Zone 1
Zone 1
Zone 2
Zone 3
Zone 4
Zone 4
CB Open
LD0V
Trip BTrip A
Zone 4
CB Open
LD0V
CRx
CRx
CTx
CTx
&
&
&
&
&
&
&
TZ4
TZ3
TZ2
TZP
TZ1
Z4
Z3
Z2
ZP
Z1
Z4
Z3
Z2
ZP
Z1
TZ4
TZ3
TZ2
TZP
TZ1
1
1
1
1
Z
Z
B
Figure 103: Aided Distance POR scheme
The POR scheme is enhanced by POR Trip Reinforcement, and POR Weak Infeed features.
4.2.1
PERMISSIVE OVERREACH TRIP REINFORCEMENT
The send logic in the POR scheme is arranged so that for any trip command at a local end, the local protection
sends a Channel Aided signal to the remote end(s). This facilitates fault isolation at each terminal as quickly as
possible. The send signal is generated by the Any Trip command, and it is sent on any channel that is being used.
Chapter 8 - Carrier Aided Schemes P543i/P545i
216 P54x1i-TM-EN-1