Functions
2.10 Automatic Reclosure Function (optional)
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
136
If the automatic reclosure function is controlled by the trip command, the following inputs and outputs are rec-
ommended:
The automatic reclosure function is started via the Binary inputs
:
2711 „>AR Start“ General fault detection for the automatic reclosure circuit (only required for
action time),
2712 „>Trip L1 AR“ Trip command L1 for the automatic reclosure circuit,
2713 „>Trip L2 AR“ Trip command L2 for the automatic reclosure circuit,
2714 „>Trip L3 AR“ Trip command L3 for the automatic reclosure circuit.
The general pickup is decisive for starting the action times. It is also required if the automatic reclosing function
has to detect sequential faults via pickup. In other cases, this input information is irrelevant.
The trip commands decide whether the dead time is activated for 1-pole or 3-pole reclose cycles or whether
the reclosure is blocked in the event of a 3-pole trip (depending on the configured dead times).
Figure 2-50 shows the interconnection between the internal automatic reclosure function of the 7SD610 and
an external protection device, as a connection example for 1-pole cylces.
To achieve 3-pole coupling of the external protection and to release, if necessary, its accelerated stages before
reclosure, the following output
functions are suitable:
2864 „AR 1p Trip Perm“ Internal automatic reclosure function ready for 1-pole reclose cycle, i.e.
allows 1-pole tripping (logic inversion of the 3-pole coupling).
2889 „AR 1.CycZoneRel“ Internal automatic reclosure function ready for the first reclose cycle, i.e. re-
leases the stage of the external protection device for reclosure, the corre-
sponding outputs can be used for other cycles. This output can be omitted if
the external protection does not require an overreaching stage (e.g. differ-
ential protection).
2820 „AR Program1pole“ Internal automatic reclosure function is programmed for one pole, i.e. only
recloses after single-pole tripping. This output can be omitted if no over-
reaching stage is required (e.g. differential protection).
Instead of the 3-phase-segregated trip commands, the 1-pole and 3-pole tripping may also be signalled to the
internal automatic reclosure function - provided that the external protection device is capable of this -, i.e.
assign the following binary inputs
of the 7SD610:
2711 „>AR Start“ General fault detection for the internal automatic reclosure function (only re-
quired for action time),
2715 „>Trip 1pole AR“ Trip command 1-pole for the internal automatic reclosure function,
2716 „>Trip 3pole AR“ Trip command 3-pole for the internal automatic reclosure function.
If only 3-pole reclosure cycles are to be executed, it is sufficient to assign the binary input „>Trip 3pole AR“
(No. 2716) for the trip signal. Figure 2-51 shows an example. Any overreaching stages of the external protec-
tion are enabled again by „AR 1.CycZoneRel“ (No. 2889) and of further cycles, if applicable.
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