Hardware Modifications; General - Siemens SIPROTEC 7SD610 Manual

Mounting and Commissioning
3.1 Mounting and Connections
3.1.2

Hardware Modifications

3.1.2.1 General

A subsequent adaptation of hardware to the power system conditions can be necessary for example with
regard to the control voltage for binary inputs or termination of bus-capable interfaces. Follow the procedure
described in this section, whenever hardware modifications are carried out.
Auxiliary Voltage
There are different ranges of input voltage for the auxiliary voltage (refer to the Ordering Information in Appen-
dix A.1). The power supplies of the variants for DC 60 V/110 V/125 V and 110 V/125 V/220 V/250 V, AC 115
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 further below at „Processor
Board C-CPU-2" Location and ratings of the miniature fuse and the buffer battery are also shown. When the
device is delivered, these jumpers are set according to the name-plate sticker. Generally, they do not need to
be altered.
Live Contact
The life contact of the device is a changeover contact from which either the NC contact or the NO contact can
be connected to the device terminals via a plug-in jumper (X40). Assignments of the jumpers to the contact type
and the spatial layout of the jumpers are described in the following Section at margin heading „Processor Board
C-CPU-2".
Rated Currents
The input transformers of the device are set to a nominal current of 1 A or 5 A by burden switching. The jumpers
are factory-set according to the name-plate sticker. The assignment of the jumpers to the nominal current and
the spatial arrangement of the jumpers are described in the following section under the margin heading „In-
put/Output Board C-I/O-11". All jumpers must be set for one nominal current, i.e. one jumper (X61 to X64) for
each input transformer and additionally the common jumper X60.
Note
If in exceptional cases the current ratings are changed, you have to inform the device of these changes by en-
tering the new values in address 206 CT SECONDARY in the Power System Data (see Section 2.1.2.1).
Control Voltage for Binary Inputs
When the device is delivered the binary inputs are set to operate with a voltage that corresponds to the nominal
voltage of the power supply. If the nominal values differ from the power system control voltage, it may be nec-
essary to change the switching threshold of the binary inputs.
To change the switching threshold of a binary input, a jumper must be reallocated in each case. The physical
arrangement of the binary input jumpers in relation to the pickup voltages is explained in the sections below
under margin headings „Processor Board C-CPU-2" and „Input/Output Board C-I/O-11".
Note
If binary inputs are used for trip circuit supervision, please note that two binary inputs (or a binary input and a
bypass resistance) are connected in series. The switching threshold must lie clearly below half the nominal
control voltage.
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SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011