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[anschlussbsp-ext-weger-3-pol-we-wlk-310702, 1, en_US]
Figure 2-55
Control of the Internal Automatic Reclosure by an External Protection Device
The internal automatic reclosure function of the device can be controlled by an external protection device.
This is of use, for example, on line ends with redundant protection or additional backup protection when the
second protection is used for the same line end and has to work with the automatic reclosing function inte-
grated in the 7SD80.
The binary inputs and outputs provided for this functionality must be considered in this case. In this context, it
must be decided whether the internal auto reclose function is to be controlled by the starting (pickup) or by
the trip command of the external protection (see also above at "Control Mode of the Automatic Reclosure").
The interaction is controlled via binary outputs and binary inputs:
2889
79 1.CycZoneRel
2716
>79 TRIP 3p
[anschlussbsp-ext-schutzger-3-pol-we-wlk-310702, 1, en_US]
Figure 2-56
If the internal automatic reclose function is controlled by the pickup, the phase-dedicated pickup signals of
the external protection must be connected if distinction shall be made between different types of fault. The
general trip command then suffices for tripping (no. 2746).
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
Connection example with external reclosure device for 3-pole AR
Internal automatic reclosure ready for the first reclose cycle, i.e. releases
the element of the external protection decisive for reclosure, the corre-
sponding output can be used for the second cycle. This output can be
omitted if the external protection does not require an overreaching
element (e.g. differential protection).
Trip signal
Connection example with external protection device for 3-pole reclosure; AR control mode =
with TRIP
2.11 Automatic Reclosure Function (optional) 79
Figure 2-57
shows a connection example.
Functions
135
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