Siemens siprotec 7SA522 User Manual

2 Functions
242
7SA522 Manual
C53000-G1176-C155-3
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 General fault detection for the internal automatic reclo-
sure function (only required for action time),
2715 ´!7ULSSROH$5µ Trip command 1-pole for the internal automatic reclo-
sure,
2716 ´!7ULSSROH$5µ Trip command 3-pole for the internal automatic reclo-
sure function,
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

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English