Functions
6-977SA6 Manual
C53000-G1176-C133-1
Figure 6-59 Logic diagram of the echo function with distance protection teleprotection
6.4.2 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 .
Depending on this configuration setting, only those parameters that are relevant to the
selected mode of operation will appear here. If the teleprotection supplement is not
required, address is 7HOHSURW'LVW = 'LVDEOHG.
The following teleprotection schemes are available:
− 3877 3LFNXS = Permissive underreach transfer trip with pickup, as
referred to in Subsubsection 6.4.1.1,
− 3877 = Permissive underreach transfer trip with zone
acceleration Z1B, as referred to in Subsubsection
6.4.1.2,
− 3277 = Permissive overreach transfer trip, as referred to in
Subsubsection 6.4.1.4,
− 'LUHFWLRQDO
&RPSDULVRQ
3LFNXS = Directional comparison pickup,
as referred to in Subsubsection 6.4.1.5,
− 8QEORFNLQJ = Unblocking with Z1B, as referred to in Sub-section
6.4.1.6,
− %ORFNLQJ = Blocking scheme, as referred to in Sub-section 6.4.1.7,
Dist. OFF/BLOCK
O/C OFF/BLOCK
T
Dis. PICKUP
&
S
R
Q
from rec. logic (Figure
6-48, 6-50 or 6-52)
O/C PICKUP
≥1
&
>Dis.T.BlkEcho
ECHO only
OFF
ECHO and TRIP
„1“
≥1
≥1
7LPH'(/$<
0
20 0
T
7ULS(;7(16,21
&
Echo release by earth fault
protection
(refer also to Figure 6-78)
&
CB open (3pole)
≥1
&
S
R
Q
ECHO SIGNAL
≥1
&
O/C VTsec lost
&
4040
ms
4246
)&7:HDN,QIHHG
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