Siemens siprotec 7SA522 - Page 313

Functions
6-1657SA522 Manual
C53000-G1176-C119-2
If only three-pole reclose cycles are to be executed, it is sufficient to assign the binary
input "!7ULSSROH$5“ (F.No ) for the trip signal. Figure 6-89 shows an
example. The overreaching stages of the external protection are again enabled by
"$5&\F=RQH5HO" (F.No ) and if applicable by further cycles.
Figure 6-88 Connection example with external protection device for 1-/3-pole reclosure;
AR control mode =
ZLWK3,&.83
Figure 6-89 Connection example with external protection device for 3-pole reclosure;
AR control mode = ZLWK75,3
If, on the other hand, the internal automatic reclosure function is controlled by the
pickup
(only possible with three-pole tripping: 7ULSPRGH SROHRQO\, the
phase-segragated start signals must be connected from the external protection. The
general trip command then suffices for tripping (F.No ). Figure 6-90 shows con-
nection examples.
7SA522
AR Start
Tripping L1
Tripping L2
Tripping L3
L+
external
protection device
Relay Pickup
3-phase coupling
L–
L–
L–
only 1-pole
(if nec. for other AR)
>AR Start
>Trip L1 AR
>Trip L2 AR
>Trip L3 AR
AR 1.CycZoneRel
AR 1p Trip Perm
AR Program1pole
7SA522
trip
Tripping
L+
external
protection device
Relay Pickup
L–
L–
L+
(if nec. for other AR)
>AR Start
AR 1p Trip Perm
AR 1.CycZoneRel