Functions
6-182 7SA6 Manual
C53000-G1176-C133-1
external protection. The general trip command then suffices for tripping (F.No ).
Figure 6-101 shows connection examples.
Figure 6-101 Connection example with external protection device for fault detection
dependent dead time — dead time control by start signals of the protection
device;
AR control mode =
ZLWK3,&.83
2 Protection
Devices with 2
Automatic
Reclosure
Functions
If redundant protection is provided for a line and each protection operates with its own
automatic reclosure function, a certain signal exchange between the two combinations
is necessary. The connection example in figure 6-102 shows the necessary cross-
connections.
If phase segregated auxiliary contacts of the circuit-breaker are connected, a three-
pole coupling by the 7SA6 is guaranteed when more than one CB pole is tripped. This
requires setting of the forced three pole coupling (see section 6.12.2 under subtitle
7SA6
Pick-up L1
Pick-up L2
Pick-up L3
Tripping
L+
external
protection device
L–
Starting signal for each phase
7SA6
Pick-up 1-phase
Pick-up 2-phase
Pick-up 3-phase
Tripping
L+
external
protection device
L–
Starting signal 1-phase, 2-phase and 3-phase
Release AR Stage
L– L+
(if nec. for other AR)
Release AR Stage
L– L+
(if nec. for other AR)
!3LFNXS/$5
!3LFNXS/$5
!3LFNXS/$5
!7ULSIRU$5
AR 1.CycZoneRel
!3LFNXSSK$5
!3LFNXSSK$5
!3LFNXSSK$5
!7ULSIRU$5
$5&\F=RQH5HO
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