Siemens siprotec 7SA6 User Manual page 365

7SA6 Manual
C53000-G1176-C133-1
"Forced Three-pole Trip", page 6-186). An external automatic three-pole coupling is
therefore not necessary when the above conditions are satisfied. This rules out two-
pole tripping under all circumstances.
7SA6
internal
AR function
!$5 6WDUW
BI
!7ULS / $5
BI
!7ULS / $5
BI
!7ULS / $5
BI
L–
Protective function
L+
$5 6WDUW
SO
SO
Trip L1*)
SO
Trip L2*)
SO
Trip L3*)
L+
Relay TRIP 1pL1
C
Relay TRIP 3ph.
Relay TRIP 1pL2
C
Relay TRIP 3ph.
Relay TRIP 1pL3
C
Relay TRIP 3ph.
BI – binary input
SO – signal output
C – commands
*) – for all protective functions
operating with reclosure
Figure 6-102 Connection example for 2 protection devices with 2 automatic reclosure
functions
*)
L1 L2 L3
to the circuit-breaker
Functions
Second protection
2nd
automatic reclosure
$5 6WDUW
BI
Trip L1 BI
Trip L2
BI
Trip L3 BI
2nd protective relay
$5 6WDUW
SO
SO
Trip L1
SO
Trip L2
Trip L3 SO
Trip L1 C
C
Trip L2
C
Trip L3
L–
L+
L+
6-183