Siemens siprotec 7SA522 - Page 315

Functions
6-1677SA522 Manual
C53000-G1176-C119-2
Figure 6-91 Connection example for 2 protection devices with 2 automatic reclosure functions
2nd
Second protection
7SA522
Relay TRIP 1pL1
Relay TRIP 3ph.
Relay TRIP 1pL2
Relay TRIP 3ph.
Relay TRIP 1pL3
Relay TRIP 3ph.
L–
L–
automatic reclosure
internal
AR function
BI
BI
BI
BI
Trip L1
Trip L2
Trip L3 BI
BI
BI
BI
Protective function
$56WDUW
L+
Trip L1
Trip L2
Trip L3
SO
SO
SO
SO
2nd protective relay
$56WDUW*)
L+
Trip L1*)
Trip L2*)
Trip L3*)
SO
SO
SO
SO
Trip L1
L+
Trip L2
Trip L3
C
C
C
L+
C
C
C
L1 L2 L3
to the circuit-breaker
BI – binary input
SO – signal output
C – commands
*) – for all protective functions
operating with reclosure
!7ULS/$5
!$56WDUW $56WDUW
!7ULS/$5
!7ULS/$5