Functions
2.17 Automatic Reclosure Function (optional)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
329
Figure 2-161 for example, shows the interconnection between a 7SD5 and an external reclosure device with a
mode selector switch.
Depending on the external reclosure device requirements, the three 1-pole indications (No. 512, 513, 514) can
be combined to one „1-pole tripping“ output; No. 515 sends the „3-pole tripping“ signal to the external device.
In case of exclusively 3-pole reclose cycles, the general pickup signal (No. 501, if required by the external re-
closure device) and trip signal (No. 511) of 7SD5 (see Figure 2-162) are usually sufficient.
Figure 2-161 Connection example with external auto-reclosure device for 1-/3-pole AR with mode selector
switch
Figure 2-162 Connection example with external reclosure device for 3-pole AR
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