Siemens siprotec 7SA522 User Manual

2.13 Automatic reclosure function (optional)
253
7SA522 Manual
C53000-G1176-C155-3
Notes on the Infor-
mation 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.
´!%/.$5F\FOHµ (FNo. 2742) to ´!%/.Q$5µ (FNo. 2745)
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 func-
tion is blocked dynamically; no further automatic reclosures cycles are then executed.
´$5&\F=RQH5HOµ (FNo. 2889) to ´$5&\F=RQH5HOµ (FNo. 2892)
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 overreaching trip stages prior to the cor-
responding reclose cycle.
´$5LVEORFNHGµ (FNo. 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.
´$5QRWUHDG\µ (FNo. 2784)
The automatic reclosure is not ready for reclosure at the moment. In addition to the
´$5LVEORFNHGµ (FNo 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 protec-
tion test cycle with reclosure may be initiated during this state.
´$5LQSURJUHVVµ (FNo. 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 reclo-
sure 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.
´$56\QF5HTXHVWµ (FNo. 2865)
Measuring request to an external synchronism check device. The information appears
at the end of a dead time subsequent to three-pole tripping if a synchronism request
was parameterized for the corresponding cycle. Reclosure only takes place when the
synchronism check device has provided release signal ´!6\QFUHOHDVHµ
(FNo 2731).

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English