Hardware Modifications; General - Siemens SIPROTEC 7SJ62 Manual

3.1.2

Hardware Modifications

3.1.2.1 General

Hardware modifications concerning, for instance, the control voltage for binary inputs or termination of serial
interfaces might be necessary. Follow the procedure described in this section, whenever hardware modifica-
tions are carried out.
Since the construction of modules varies from device to device, detailed information concerning hardware mod-
ifications on devices 7SJ62 and 7SJ64 is specified separately.
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 for devices 7SJ62 and 7SJ64 are described
separately in the following sections. Location and ratings of the miniature fuse and the buffer battery are also
shown. When the devices are delivered, these jumpers are set correctly according to the nameplate stickers
and need not be altered.
Live Status Contact
The live contacts of devices 7SJ62/64 are changeover contacts. With device 7SJ64 either the normally closed
(NC) contact or the normally open (NO) contact can be connected to two device connections via a plug-in
jumper (X40). The assignment of the plug-in jumper to the contact type and the spatial arrangement of the
jumper are described in the following section for the device 7SJ64.
Nominal Currents
The input transformers of the device are set to a nominal current of 1 A or 5 A by means of burden switching.
The jumpers were positioned at the factory according to the specifications on the nameplate sticker. The as-
signment of the plug-in jumpers to the nominal current and the spatial arrangement of the jumpers are de-
scribed separately for devices 7SJ62 and 7SJ64 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 transformers, 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 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).
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
Mounting and Commissioning
3.1 Mounting and Connections
397