2 Functions
146
7SA522 Manual
C53000-G1176-C155-3
Figure 2-61 Logic diagram of the echo function with distance protection with teleprotection
2.6.10 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 . Depend-
ing on this configuration, only those parameters which are applicable to the selected
mode appear here. If the teleprotection supplement is not required the address is
set to 7HOHSURW'LVW = 'LVDEOHG.
Conventional
Transmission
The following modes are possible with conventional transmission links (as described
in Subsection 2.6):
Direct Underreach Transfer Trip Remote trip without any pickup,
3877=% Permissive Underreach Transfer Trip with Zone Accel-
eration Z1B (PUTT)
3277 Permissive Overreach Transfer Trip (POTT),
81%/2&.,1* Directional Unblocking scheme,
%/2&.,1* Directional Blocking scheme.
At address )&77HOHS'LV the use of a teleprotection scheme can be
turned 21 or 2)).
If the teleprotection has to be applied to a three terminal line the setting in address
must be 7\SHRI/LQH = 7KUHHWHUPLQDOV, if not, the setting remains 7ZR
7HUPLQDOV.
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