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Figure 2-124
Figure 2-125
Controlling the In-
If the 7SD5 is equipped with the internal automatic reclosure function, it may also be
ternal Automatic
controlled by an external protection device. This is of use, for example, on line ends
Reclosure by an Ex-
with redundant protection or additional back-up protection when the second protection
ternal Protection
is used for the same line end and has to work with the automatic reclosure function
Device
integrated in the 7SD5.
The binary inputs and outputs provided for this functionality must be considered in this
case. It must be decided whether the internal auto-reclosure is to be controlled by the
starting (pickup) or by the trip command of the external protection (see also above
under „Control Mode of the Automatic Reclosure").
If the auto-reclosure is controlled by the trip command, the following inputs and
outputs are recommended to be used:
7SD5 Manual
C53000-G1176-C169-1
Connection example with external auto-reclosure device for 1-/3-pole AR with
mode selector switch
Connection example with external reclosure device for 3-pole AR
2.15 Automatic Reclosure Function (optional)
297
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