Siemens siprotec 7SA6 User Manual

Functions
6-97SA6 Manual
C53000-G1176-C133-1
this difference must also be considered:
Address: 8OLQH8V\QF= 100 V/ 110 V =

Figure 6-9 Busbar voltage, measured across a power transformer
• Connection of the U
4
input to any other voltage signal U
X
, which may be processed
by the overvoltage protection function, refer to Appendix A, Figure A-27:
Address  is then set: 8WUDQVIRUPHU = 8[WUDQVIRUPHU.
It is assumed, that the Ux transformer ratio is equal to the phase voltage
transformer ratio.
• If the U
4
input is not required, the following setting is applied:
Address  8WUDQVIRUPHU = 1RWFRQQHFWHG.
Also in this case the factor 8SK8GHOWD (Address , refer to the above) is
of importance, as it is utilised for the scaling of the measurement and disturbance
recording signals.
Current
Transformer
Connection
The device contains four current measurement inputs, three of which are connected
to the set of current transformers. The fourth current measuring input I
4
may be utilised
in various ways:
• Connection of the I
4
input to the earth current in the starpoint of the set of current
transformers on the protected feeder (normal connection, refer to Appendix A,
Figure A-20):
Address  is then set to: ,WUDQVIRUPHU = ,QSURWOLQH and
Address  to ,,SK&7 = 1.
• Connection of the I
4
input to a separate earth current transformer on the protected
feeder (e.g. a summation CT or cable-type current transformer, refer to Appendix
A, e.g. Figure A-21).
Address  is then set to: ,WUDQVIRUPHU = ,QSURWOLQH and
Address is set to,,SK&7:
L1
L2
L3
U
L1
U
L2
U
L3
(any voltage)
U
E
U
SS
feeder
Busbar
Yd5
220 kV
400 kV/220 kV
87UDQVIRUPHU = 8SS7UDQVIRUPHU
8OLQH8SS:'/
= 
8SS&211 = /²/
ϕ 8SS8OLQH =  °
220 kV/100 V
400 kV
110 V
400 kV

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English