2.13 Automatic reclosure function (optional)
239
7SA522 Manual
C53000-G1176-C155-3
382 ´!2QO\SK$5µ The external reclosure device is only programmed for
1 pole; the stages of the individual protection functions
that are activated before reclosure via FNo. 383 only
do so in the case of single-phase faults; in the event of
multiple phase faults these stages of the individual
short-circuit functions do not operate. This input is not
required if no overreaching stage is used (e.g. differen-
tial protection or comparison scheme with distance
protection, see also above at margin heading “Selec-
tivity before Reclosure”).
381 ´!S7ULS3HUPµ 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 protection func-
tions trip 3-pole for all faults. If the external reclosure
device cannot supply this signal but sends a “3-pole
coupling” signal instead, this must be taken into
account in the routing of the binary inputs: The signal
must be inverted in this case (L-active = active without
voltage).
Binary outputs
:
501 ´5HOD\3,&.83µ Start of protection device, general (if required by exter-
nal recloser device).
512 ´5HOD\75,3S/µ Trip protective device 1-pole phase L1.
513 ´5HOD\75,3S/µ Trip protective device 1-pole phase L2.
514 ´5HOD\75,3S/µ Trip protective device 1-pole phase L3.
515 ´5HOD\75,3SKµ Trip protective device 3-pole,
In order to obtain a phase-segregated trip indication, the respective single-pole trip
commands must be combined with the three-pole trip command on one output.
Figure 2-103 for example, shows the interconnection between a 7SA522 and an ex-
ternal reclosure device with a mode selector switch.
Depending on what the external recloser device requires, the three single-pole outputs
(FNo. 512, 513, 514) may also be combined to one “single-pole tripping” output; the
FNo. 515 provides the “three-pole tripping” signal to the external device.
For exclusively three-pole auto-reclosure cycles, the general pickup (FNo. 501, if re-
quired by the external reclosure device) and general trip signal (FNo. 511) from
7SA522 (see Figure 2-104) usually suffice.
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