Siemens siprotec 7SA6, Manual

Page: 304 / 876

Functions
6-114
7SA6 Manual
C53000-G1176-C156-2
Figure 6-67 Logic diagram of the echo function with distance protection teleprotection
6.6.2 Applying the Function Parameter Settings
General
The distance protection teleprotection supplement is only in service if it is set during
the configuration to one of the possible modes of operation in address
121
. Depend-
ing on this configuration setting, only those parameters that are relevant to the select-
ed mode of operation will appear here. If the teleprotection supplement is not required,
address
121
is
Teleprot. Dist.
=
Disabled
.
The following teleprotection schemes are available:
−
PUTT (Pickup)
= Permissive underreach transfer trip with pickup, as re-
ferred to in Subsubsection 6.6.1.1,
−
PUTT
= Permissive underreach transfer trip with zone accelera-
tion Z1B, as referred to in Subsubsection 6.6.1.2,
−
POTT
= Permissive overreach transfer trip, as referred to in Sub-
subsection 6.6.1.4,
−
Directional
Comparison
Pickup
= Directional comparison pickup,
as referred to in Subsubsection 6.6.1.5,
−
Unblocking
= Unblocking with Z1B, as referred to in Sub-section
6.6.1.6,
−
Blocking
= Blocking scheme, as referred to in Sub-section 6.6.1.7,
Dist. OFF/BLOCK
O/C OFF/BLOCK
T
Dis. PICKUP
&
S
R
Q
from rec. logic (Figure
6-58 or 6-60)
O/C PICKUP
≥
1
&
>Dis.T.BlkEcho
ECHO only
OFF
ECHO and TRIP
„1“
≥
1
≥
1
2502 Time DELAY
0
20 0
T
2503
Trip EXTENSION
&
Echo release by earth fault
protection
(refer also to Figure 6-86)
&
CB open (3pole)
≥
1
&
S
R
Q
ECHO SIGNAL
≥
1
&
O/C VTsec lost
&
4040
ms
4246
FCT Weak Infeed
2501