Siemens siprotec 7SA522 - Protection Data Interfaces and Communication Topology Data (optional)

Installation and Commissioning
8-6 7SA522 Manual
C53000-G1176-C119-2
8.1.2 Termination variants
Outline diagrams are shown in Appendix 1.2. Connection examples for current and
voltage transformer circuits are provided in Appendix 1.3. It must be checked that the
setting configuration of the 3RZHU6\VWHP'DWD36\VWHP'DWD corre-
sponds with the connections to the device.
Currents The Figures 1-9 to 1-12 show examples of the current transformer connection options.
For the normal connection according to Figure 1-9 address  must be set to,
WUDQVIRUPHU = ,QSURWOLQH, and furthermore address  must be set to ,
,SK&7 = .
For the connection as shown in Figure 1-10 the setting of address  must also be
,WUDQVIRUPHU = ,QSURWOLQH. The factor  ,,SK&7 may deviate
from 1. For notes on how to calculate the factor, refer to Sub-section 6.1.1 under “Cur-
rent Transformer Connection”.
In Figure 1-11 an example of the connection of the earth current of a parallel line is
shown (for parallel line compensation). In address  ,WUDQVIRUPHU the set-
ting option ,QSDUDOOLQH must be set. The factor  ,,SK&7 may deviate
from 1. For notes on how to calculate the factor, refer to Sub-section 6.1.1.
In Figure 1-12 an example of the connection of the earth current of a source transform-
er is shown. In address  ,WUDQVIRUPHU the setting option ,<VWDUSRLQW
must be set. Notes regarding the factor  ,,SK&7 may again be found in Sub-
section 6.1.1.
Voltages The Figures 1-13 to 1-15 show examples of the voltage transformer connection op-
tions.
For the normal connection as shown in Figure 1-13 the 4th voltage measuring input
U
4
is not used. Correspondingly the address  must be set to 8WUDQVIRUPHU
= 1RWFRQQHFWHG.The factor in address  8SK8GHOWD must however be set
to
1.73 (this factor is used internally for the conversion of measurement and fault re-
cording values).
Figure 1-14 shows an example of the additional connection of an e–n winding of the
set of voltage transformers. address  must in this case be set to 8WUDQV
IRUPHU =8GHOWDWUDQVIThe factor in address  8SK8GHOWDis depend-
ent on the ratio of the e–n winding. Notes may be referred to in Sub-section 6.1.1 un-
der “Voltage Transformer Connection”.
Figure 1-15 shows an example of the connection of a different voltage, in this case the
busbar voltage (e.g. for overvoltage protection). For overvoltage protection address
 must be set to 8WUDQVIRUPHU = 8[WUDQVIRUPHU. The factor address
 8OLQH8V\QF is always equal to 1 unless the lineside VT and busbarside
VT have a different transformation ratio. The factor in address  8SK8GHOWD
must be
1.73 (this factor is used internally for the conversion of measurement and fault
recording values).
Binary Inputs and
Outputs
The configuration of the binary in and outputs, i.e. the individual adaptation to the plant
conditions, is described in Section 5.2. The connections to the plant are dependent on
this actual configuration.