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Functions
2.17 Automatic Reclosure Function (optional)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
328
Figure 2-160 AR Remote-Close function via protection data interface
The close command can be transmitted by a teleprotection scheme using the protection data interfaces. When
the indication
„AR Remote Close“ is output, this information is transmitted at the same time to the remote
end via the protection data interface. The information is OR-combined with the information of the binary input
„>AR RemoteClose“ and made available to the automatic reclosure. (Figure 2-160)
Connecting an External Auto-Reclosure Device
If the 7SD5 has to work with an external reclosure device, the binary inputs and outputs provided for this
purpose must be taken into consideration. The following inputs and outputs are recommended:
Binary inputs:
383 „>Enable ARzones“ With this binary input, the external reclosure device controls stages of the
individual short-circuit protection functions which are active before reclosure
(e.g. overreaching zone in the distance protection). This input is not required
if no overreaching stage is used (e.g. differential protection or comparison
mode with distance protection, see also above margin heading „Selectivity
before Reclosure“).
382 „>Only 1ph AR“ The external reclosure device is only programmed for 1 pole; the stages of
the individual protection functions that are activated before reclosure via No
383 only do so in the case of 1-phase faults; in the event of multiple-phase
faults these stages of the individual short-circuit protection functions do not
operate. This input is not required if no overreaching stage is used (e.g. dif-
ferential protection or comparison mode with distance protection, see also
margin heading „Selectivity before reclosure“, above).
381 „>1p Trip Perm“ The external reclosure device allows 1-pole tripping (logic inversion or 3-
pole coupling). If this input is not assigned or not routed (matrix), the protec-
tion functions trip 3-pole for all faults. If the external reclosure device cannot
supply this signal but supplies a „3-pole coupling“ signal instead, this must
be taken into account in the allocation of the binary inputs: the signal must
be inverted in this case (L-active = active without voltage).
Binary outputs:
501 „Relay PICKUP“ Start of protection device, general (if required by external recloser device).
512 „Relay TRIP 1pL1“ Trip of the device 1-pole L1.
513 „Relay TRIP 1pL2“ Trip of the device 1-pole L2.
514 „Relay TRIP 1pL3“ Trip of the device 1-pole L3.
515 „Relay TRIP 3ph.“ Trip of the device 3-pole.
In order to obtain a phase-segregated trip indication, the respective 1-pole trip commands must be combined
with the 3-pole trip command on one output.