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Functions
6-167
7SA6 Manual
C53000-G1176-C156-2
Figure 6-94
Logic diagram of the stub protection
Instantaneous
Tripping before
Automatic
Reclosure
Automatic reclosure is applied in order to instantaneously remove the fault before au-
tomatic reclosure. Via binary input „
>O/C InstTRIP
“ a release signal can be input
by an external automatic reclosure apparatus. The internal automatic reclosure - if
available - is also effected by this command. Any stage of the time overcurrent protec-
tion can thus trip instantaneously before automatic reclosure by parameter
I-STUB
Telep/BI
.
Switching onto a
Dead Fault
To achieve fast tripping following manual closure of the circuit breaker onto a dead
fault, the switch onto fault signal can be routed to the overcurrent protection. The over-
current protection can then trip three-pole without delay or with a reduced delay. It can
be determined via setting parameter for which stage(s) the rapid tripping following
closure on to a dead fault applies. (Refer also to the logic diagrams in Figures 6-91,
6-92 and 6-94, and Subsection 6.1.3, margin “Circuit Breaker Status”).
Fault Detection and
Trip Logic
The fault detection signals of the individual phases (and earth) and the individual stag-
es are combined in such a manner that both the phase information as well as the stage
information of the picked up stages can be output. (Table 6-11).
In the case of the trip signals, the stage which resulted in the trip command is also in-
dicated. If the device has the option to trip single-pole, and this option has been acti-
I
L3
I
L2
I
L1
I
ph
2630
&
2631
T Iph STUB
T
0
&
≥
1
2635
Yes
No
I-STUB SOTF
2634
Yes
No
I-STUB Telep/BI
≥
1
L3
L2
L1
3I
0
&
T
0
&
≥
1
E
2633
T 3I0> STUB
2632
I
E
switch onto
fault
T
0
2680
SOTF Time DELAY
Iph> STUB
3I0> STUB
7131 >I-STUB ENABLE
7130 >BLOCK I-STUB
7110 >O/C InstTRIP
I-STUB Trip E
I-STUB Pickup E
I-STUB Trip L3
I-STUB Trip L2
I-STUB Trip L1
I-STUB Pickup L3
I-STUB Pickup L2
I-STUB Pickup L1
Summary of Contents for siprotec 7SA6
Page 2: ...Siemens Aktiengesellschaft Book No C53000 G1176 C156 2 ...
Page 18: ...xviii 7SA6 Manual C53000 G1176 C156 2 ...
Page 32: ...Introduction 1 14 7SA6 Manual C53000 G1176 C156 2 ...
Page 82: ...Hardware and Connections 2 50 7SA6 Manual C53000 G1176 C156 2 ...
Page 119: ...SIPROTEC 4 Devices 4 25 7SA6 Manual C53000 G1176 C156 2 Figure 4 20 CFC Logic example ...
Page 190: ...Configuration 5 62 7SA6 Manual C53000 G1176 C156 2 ...
Page 652: ...Installation and Commissioning 8 78 7SA6 Manual C53000 G1176 C156 2 ...
Page 724: ...Technical Data 10 56 7SA6 Manual C53000 G1176 C156 ...
Page 800: ...Appendix A 76 7SA6 Manual C53000 G1176 C156 2 ...
Page 866: ...Appendix B 66 7SA6 Manual C53000 G1176 C156 2 ...