Siemens Siprotec 7VK61 Manual page 53

To achieve three pole coupling of the external protection and to release, if necessary, its accelerated stages
before reclosure, the following output functions are suitable:
2864 „AR 1p Trip Perm"
2889 „AR 1.CycZoneRel"
2820 „AR Program1pole"
Instead of the three phase-segregated trip commands, the single-pole and three-pole tripping may also be sig-
nalled to the internal automatic reclosure function - provided that the external protection device is capable of
this -, i.e. assign the following binary inputs of the 7VK61:
2711 „>AR Start"
2715 „>Trip 1pole AR"
2716 „>Trip 3pole AR"
If only three-pole reclosure cycles are to be executed, it is sufficient to assign the binary input „>Trip 3pole
AR" (no. 2716) for the trip signal. Figure 2-8 shows an example. Any overreaching stages of the external pro-
tection are enabled again by „AR 1.CycZoneRel" (no. 2889) and, if necessary, of further cycles.
Figure 2-8
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
Internal automatic reclosure function ready for single-pole reclose cycle, i.e.
allows single-pole tripping (logic inversion of the three-pole coupling).
Internal automatic reclosure function ready for the first reclose cycle, i.e. re-
leases the stage of the external protection device for reclosure, the corre-
sponding outputs can be used for other cycles. This output can be omitted if
the external protection does not require an overreaching stage (e.g. differ-
ential protection or comparison mode with distance protection).
Internal automatic reclosure function is programmed for one pole, i.e. only
recloses after single-pole tripping. This output can be omitted if no over-
reaching stage is required (e.g. differential protection or comparison mode
with distance protection).
General fault detection for the internal automatic reclosure function (only re-
quired for action time),
Trip command single-pole for the internal automatic reclosure,
Trip command three-pole for the internal automatic reclosure function,
Connection example with external protection device for 1-/3-pole reclosure; AR control mode
= with TRIP
2.2 Automatic reclosure function (optional)
Functions
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