Arcteq AQ-F210, Инструкция по эксплуатации

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Instruction manual –AQ F210 Feeder Protection IED 178 (292
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Arcing time can be used for controlling the autoreclosing in cases protection function Start
signal is making the requests. In case if the request (start) activates during the Reclaim time
the Arcing time calculation starts and if fault persists autorecloser shall continue to next
stage. If Arcing time calculation starts but stops before the set time have been used then
Reclaim time calculation continues normally and when it is elapsed autorecloser shall return
to either General Reclaim time or into Ready mode and the shot is considered as
successful. Arcing time counter is not resetting from the request drop off during the Reclaim
time and every time the request is activated (e.g. protection function starts) the arcing time
counter is deducted by the time request is on. This means that the time set to Arcing time
parameter means cumulative time of start allowed in Reclaim time before decision is made
that the shot is failed or succeeded.
In case the autoreclosing is used in the time coordinated network protected by IDMT time
characteristics and the relays are old mechanical types which have also current dependent
release time the operation of the protection selectivity has to be guaranteed by allowing all
of the relays timing devices reset completely during the dead time so that the correct time
discrimination is maintained after reclosing to the fault. Time required for mechanical IDMT
relay to reset may be even 10 s in some cases. When short dead times are required the
relays should reset almost instantaneously so that the current dependent time grading
operates as expected. For these cases in the autorecloser is possible to set certain
discrimination time instead of arcing time, which starts simultaneously with reclaim time and
if during this discrimination time any new reclosing requests are made the recloser will halt
and let the protection devices operate based into their settings and does not interfere on
the operation of the protection functions or the breaker. This means also that further
reclosing are not made before the autorecloser is reset manually and the breaker shall
remain open until it is manually closed.
4.3.3.11 A
UTORECLOSER
IO
Main outputs of the autorecloser function are Object open and Object close control signals.
In addition to these output controls the function will report the recloser status information to
be used in the logics or LED indications as well as applied operations. Setting parameters
are static inputs for the function which are changed only by user input in the setup phase of
the function.
Inputs for the function are binary recloser request signals, blockings and controlling signals,
controlled object monitoring and status signals. The function registers its operation into 12
last time-stamped registers and also generates general time stamped ON/OFF events to
the common event buffer from each of the two output signal as well as several operational