Information Overview - Siemens SIPROTEC 7SA6 Manual

Functions
Addr. Setting Title
3421 AR w/ SOTF-O/C
3422 AR w/ W/I
3423 AR w/ EF-O/C
3424 AR w/ DTT
3425 AR w/ BackUpO/C

6.14.4 Information Overview

6-214
Setting Options
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
The most important information about automatic reclosure is briefly explained
insofar as it was not mentioned in the following lists or described in detail in the pre-
ceding text.
" >BLK 1.AR-cycle " (F.No. 2742 ) to " >BLK 4.-n. AR " (F.No. 2745 )
The corresponding reclose cycle is blocked. If the blocking state already exists when
the automatic reclosure function is initiated, the blocked cycle is not executed and may
be skipped (if other cycles are permitted). The same applies if the automatic
reclosure function is started (running) but not busy with (inside) the cycle being
blocked. If the block signal of a cycle appears while this cycle is being executed (busy)
the automatic reclosure function is blocked dynamically; no further automatic
reclosures cycles are then executed.
" AR 1.CycZoneRel " (F.No. 2889) to " AR 4.CycZoneRel " (F.No. 2892 )
The automatic reclosure function is ready for the corresponding reclosure cycle. This
information indicates which cycle will be run next. For example, external protection
functions can use this information to release accelerated or overreaching trip stages
prior to the corresponding reclose cycle.
" AR is blocked " (F.No. 2783 )
The automatic reclosure is blocked (e.g. circuit-breaker not ready). This information
indicates to the operational information system that in the event of an upcoming sys-
tem fault there will be a final trip, i.e. without reclosure. If the automatic reclosure is
already started, this information does not appear.
" AR not ready " (F.No. 2784 )
The automatic reclosure is not ready for reclosure at the moment. In addition to the
" AR is blocked " (F.No. 2783 ) mentioned above there are also obstructions during
the course of the reclose cycles such as "action time expired" or "last reclaim time run-
ning". This information is particularly helpful during testing because no protection test
cycle with reclosure may be initiated during this state.
" AR in progress " (F.No. 2801 )
This information appears following starting of the automatic reclosure function, i.e.
with the first trip command that can start the automatic reclosure function. If this
reclosure was successful (or any in the case of more than one), this information
resets with the expiry of the last reclaim time. If no reclosure was successful or if
reclosure was blocked, it ends with the last — the final — trip command.
Default Setting
YES AR with switch-onto-fault over-
current
YES AR with weak infeed tripping
YES AR with earth fault overcurrent
prot.
YES AR with direct transfer trip
YES AR with back-up overcurrent
Comments
7SA6 Manual
C53000-G1176-C156-2