Functions
2.7 Teleprotection for Distance Protection (optional)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
212
To prevent that an echo is created after switching off the line and dropout of the pickup, an echo can no longer
be created if a pickup has already been present (RS flip-flop in Figure 2-102). Furthermore, the echo can be
blocked at anytime via the binary input
„>Dis.T.BlkEcho“
.
Figure 2-102 shows the generation of the echo release signal. Since this function is also associated with the
weak infeed tripping, it is described separately (see Section 2.11.1).
Figure 2-102
Generation of the echo release signal
2.7.14
Setting Notes
General
The teleprotection supplement of distance protection is only in service if it is set during the configuration to one
of the possible modes of operation in address
121
. Depending on this configuration, only those parameters
which are applicable to the selected mode appear here. If the teleprotection supplement is not required the
address
121
is set to
Teleprot. Dist.
=
Disabled
.
The following modes are possible with conventional transmission links (as described in Section 2.7):
Direct underreach transfer trip
Remote trip without any pickup,
PUTT (Pickup)
Permissive Underreach Transfer Trip with pickup PUTT
PUTT (Z1B)
Permissive Underreach Transfer Trip with Zone Acceleration Z1B (PUTT)
POTT
Permissive Overreach Transfer Trip (POTT),
Dir.Comp.Pickup
Directional
comparison
pickup,
UNBLOCKING
Directional
unblocking
scheme,
BLOCKING
Directional blocking scheme,
Pilot wire comp
Pilot
wire
comparison,
Rev. Interlock
Reverse
interlock
At address
2101
FCT Telep. Dis.
the use of a teleprotection scheme can be turned
ON
or
OFF
.
If the teleprotection has to be applied to a three terminal line the setting in address
2102
must be
Type of
Line
=
Three terminals
, if not, the setting remains
Two Terminals
.
