Functions
2.3 Overcurrent protection (optional)
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
73
Table 2-4
Trip signals of the single phases
2.3.3
Setting Notes
General
During configuration of the scope of functions for the device (address
126
) the available characteristics were
determined. Depending on the configuration and the order variant, only those parameters that apply to the se-
lected characteristics are accessible in the procedures described below.
At address
2601
Operating Mode
you switch time overcurrent protection
ON
or
OFF
.
If not all stages are required, each individual stage can be deactivated by setting the pickup threshold to
∞
. But
if you set only an associated time delay to
∞
this does not suppress the pickup signals but prevents the timers
from running.
One or several stages can be set as instantaneous tripping stages when switching onto a fault. This is chosen
during the setting of the individual stages (see below). To avoid a spurious pickup due to transient overcurrents,
the delay
SOTF Time DELAY
(address
2680
) can be set. Typically, the presetting of
0
is correct. A short delay
can be useful in case of long cables for which high inrush currents can be expected, or for transformers. The
time delay depends on the severity and duration of the transient overcurrents as well as on which stages were
selected for the fast switch onto fault clearance.
Internal Indication
Display
Output Indication
No.
I
>> TRIP L1
I
> TRIP L1
I
p TRIP L1
I
>>> TRIP L1
„O/C TRIP 1p.L1“ or „O/C TRIP L123“
7212 or
7215
I
>> TRIP L2
I
> TRIP L2
I
p TRIP L2
I
>>> TRIP L2
„O/C TRIP 1p.L2“ or „O/C TRIP L123“
7213 or
7215
I
>> TRIP L3
I
> TRIP L3
I
p TRIP L3
I
>>> TRIP L3
„O/C TRIP 1p.L3“ or „O/C TRIP L123“
7214 or
7215
I
>> TRIP E
I
> TRIP E
I
p TRIP E
I
>>> TRIP E
„O/C TRIP L123“
7215
I
>> TRIP L1
I
>> TRIP L2
I
>> TRIP L3
I
>> TRIP E
„O/C TRIP I>>“
7221
I
> TRIP L1
I
> TRIP L2
I
> TRIP L3
I
> TRIP E
„O/C TRIP I>“
7222
I
p TRIP L1
I
p TRIP L2
I
p TRIP L3
I
p TRIP E
„O/C TRIP Ip“
7223
I
>>> TRIP L1
I
>>> TRIP L2
I
>>> TRIP L3
I
>>> TRIP E
„I-STUB TRIP“
7235
(General TRIP)
„O/C TRIP“
7211
Summary of Contents for Siprotec 7VK61
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