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Functions
2.11 Automatic Reclosure Function 79 (Optional)
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
151
Notes on the Information Overview
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 preceding text.
„>BLK 1.AR-cycle“
(No. 2742) to
„>BLK 2.AR-cycle“
(No. 2743)
The respective auto-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 internally blocked. If the block signal
of a cycle appears while this cycle is being executed (in progress) the automatic reclosure function is blocked
dynamically; no further automatic reclosures cycles are then executed.
„79 1.CycZoneRel“
(No. 2889) and
„79 2.CycZoneRel“
(No. 2890)
The automatic reclosure is ready for the respective reclosure cycle. This information indicates which cycle will
be run next. For example, external protection functions can use this information to release accelerated or over-
reaching trip stages prior to the corresponding reclose cycle.
„79 is blocked“
(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 system fault there will be a final trip, i.e. without reclosure.
If the automatic reclosure has been started, this information does not appear.
„79 not ready“
(No. 2784)
The automatic reclosure is not ready for reclosure at the moment. In addition to the
„79 is blocked“
(No.
2783) mentioned above there are also obstructions during the course of the auto-reclosure cycles such as
„action time run out“ or „last reclaim time running“. This information is particularly helpful during testing because
no protection test cycle with reclosure may be initiated during this state.
„79 in progress“
(No. 2801)
This information appears following starting of the auto reclose function, i.e. with the first trip command that can
start the auto reclose function. If this reclosure was successful (or any in the case of multiple cycles), the infor-
mation is reset with the expiry of the last restraint time. If no reclosure was successful or if reclosure was
blocked, it ends with the last – the final – trip command.