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2 Functions
242
Instead of the three phase-segregated trip commands, the single-pole and three-pole
tripping may also be signalled 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 7SA522:
2711 ´!$5 6WDUWµ
2715 ´!7ULS SROH $5µ
2716 ´!7ULS SROH $5µ
If only three-pole reclosure cycles are to be executed, it is sufficient to assign the
binary input ´!7ULS SROH $5µ (FNo 2716) for the trip signal. Figure 2-106 shows
an example. Any overreaching stages of the external protection are enabled again by
´$5 &\F=RQH5HOµ (FNo. 2889) and of further cycles, if applicable.
Figure 2-105
Connection example with external protection device for 1-/3-pole reclosure; AR
control mode = with TRIP
General fault detection for the internal automatic reclo-
sure function (only required for action time),
Trip command 1-pole for the internal automatic reclo-
sure,
Trip command 3-pole for the internal automatic reclo-
sure function,
7SA522 Manual
C53000-G1176-C155-3
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