Functions
6-122
7SA6 Manual
C53000-G1176-C156-2
Definite Time Very
High Set Current
Stage 3I
0
>>>
The earth current
I
E
= 3
I
0
is passed through a numerical filter and then compared with
the set value
3I0>>>
. If this value is exceeded and alarm is issued. After the corre-
sponding delay times
T 3I0>>>
have expired, a trip command is issued which is also
alarmed. The reset threshold is approximately 5 % + 0,5 mA below the pick-up thresh-
old.
The possibilities of selection are referred to in the heading “General”. Figure 6-69
shows the logic diagram of the 3I
0
>>>–stage. The function modules “direction deter-
mination”, “permissive teleprotection”, “switch onto fault”, and “inrush stabilization” are
common to all stages and described below. They may however affect each stage in-
dividually. This is done with the following parameters:
•
Op. mode 3I0>>>
, determines the operating direction of the stage:
Forward
,
Reverse
or
Non-Directional
,
•
3I0>>> Telep/BI
, determines whether a non-delayed trip with the teleprotection
scheme is possible (
Yes
) or not possible (
No
),
•
3I0>>>SOTF-Trip
, determines whether during energization of the feeder onto a
fault tripping with this stage shall be non-delayed (
Yes
) or not (
No
) and
•
3I0>>>InrushBlk
, which is used to switch the inrush stabilization (rush blocking)
on (
Yes
) or off (
No
).
Figure 6-69
Logic diagram of the 3I
0
>>>–stage
Definite Time High
Set Current
Stage 3I
0
>>
The logic of the high set current stage 3I
0
>> is the same as that of the 3I
0
>>>–stage.
3I0>>> is therefore to be replaced by
3I0>>
, then, Figure 6-69 also applies for 3I
0
>>.
Definite Time
Overcurrent
Stage 3I
0
>
The logic of the overcurrent stage 3I
0
> is the same as that of the 3I
0
>>>–stage.
3I0>>> is therefore replaced with
3I0>
, then, Figure 6-69 also applies for 3I
0
>.
This stage operates with a specially optimized digital filter that completely suppresses
all harmonic components beginning with the 2nd harmonic. Therefore it is particularly
I
E
3I
0
>>>
Yes
No
Reverse
Forward
Non-Direct.
„1“
≥
1
&
&
inrush-
stabilization
direction-
determination
forwards
reverse
&
&
Yes
No
3I0>>>SOTF-Trip
3113
Yes
No
permissive
teleprot..
switch onto
fault
≥
1
EF 3I0>>> TRIP
T
0
3173
TSOTF Time DELAY
3112
T
0
&
&
PICKUP
DIRECT.
3172
&
SOTF Op. Mode
1305 >EF BLK 3I0>>>
3114
1354 EF 3I0>>>Pickup
1366
3I0>>>InrushBlk
3115
3110
3I0>>> Telep/BI
≥
1
>EF Inst TRIP
3I0>>>
3111
T 3I0>>>
Op. mode 3I0>>>
Inactive
FNo1310
Содержание siprotec 7SA6
Страница 2: ...Siemens Aktiengesellschaft Book No C53000 G1176 C156 2 ...
Страница 18: ...xviii 7SA6 Manual C53000 G1176 C156 2 ...
Страница 32: ...Introduction 1 14 7SA6 Manual C53000 G1176 C156 2 ...
Страница 82: ...Hardware and Connections 2 50 7SA6 Manual C53000 G1176 C156 2 ...
Страница 119: ...SIPROTEC 4 Devices 4 25 7SA6 Manual C53000 G1176 C156 2 Figure 4 20 CFC Logic example ...
Страница 190: ...Configuration 5 62 7SA6 Manual C53000 G1176 C156 2 ...
Страница 559: ...Control During Operation 7 45 7SA6 Manual C53000 G1176 C156 2 Figure 7 45 Circuit breaker trip test in DIGSI 4 ...
Страница 652: ...Installation and Commissioning 8 78 7SA6 Manual C53000 G1176 C156 2 ...
Страница 724: ...Technical Data 10 56 7SA6 Manual C53000 G1176 C156 ...
Страница 800: ...Appendix A 76 7SA6 Manual C53000 G1176 C156 2 ...
Страница 866: ...Appendix B 66 7SA6 Manual C53000 G1176 C156 2 ...