
Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
262
The closest standard value of 39 k
Ω
is selected; the power is:
3.1.2
Hardware Modifications
3.1.2.1
General
Hardware modifications concerning, for instance, nominal currents, the control voltage for binary inputs or ter-
mination of serial interfaces might be necessary. Follow the procedure described in this section, whenever
hardware modifications are done.
Auxiliary Voltage
There are different power supply voltage ranges for the auxiliary voltage (refer to the Ordering Information in
Appendix A.1). The power supplies of the variants for DC 60/110/125 V and DC 110/125/220 V, AC 115/230 V
are largely interchangeable by modifying the position of the jumpers. The assignment of these jumpers to the
nominal voltage ranges and their spatial arrangement on the PCB are described in the following Sections. Lo-
cation and ratings of the miniature fuse and the buffer battery are also shown. When the relays are delivered,
these jumpers are set according to the name-plate sticker. Generally, they need not be altered.
Nominal Currents
The input transformers of the devices are set to a nominal current of 1 A or 5 A with jumpers. Jumpers are set
according to the name-plate sticker. The assignment of the plug-in jumpers to the nominal current and the
spatial arrangement of the jumpers are described in the following sections.
Jumpers X61, X62 and X63 must be set for the same nominal current, i.e. there must be one jumper for each
input transformer, and the common jumper X 60.
With standard 1/5 A-jumpers jumper X64 for the ground path is set to 1 A or 5 A irrespective of other jumper
positions and depending on the ordered variant.
With models equipped with a sensitive ground fault current input (input transformer T4) of setting range 0.001
to 1.500 A there is no jumper X64.
Note
If nominal current ratings are changed by way of exception, then the new ratings must be registered via the
parameters
205
CT SECONDARY
/
218
Ignd-CT SEC
in the Power System Data (see Section 2.1.3.2).