Functions
6-1677SA6 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,theswitchontofaultsignalcanberoutedtotheovercurrentprotection.Theover-
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
T0
&
≥1
2635
Yes
No
I-STUB SOTF
2634
Yes
No
I-STUB Telep/BI
≥1
L3
L2
L1
3I
0
&
T0
&
≥1
E
2633 T 3I0> STUB
2632
I
E
switch onto
fault
T0
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
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