3 Mounting and Commissioning
376
7SA522 Manual
C53000-G1176-C155-3
Example:
The closest standard value of 39 kΩ is selected; the power is:
3.1.2 Hardware Modifications
3.1.2.1 General
A subsequent adaptation of the hardware to the power system conditions can, for ex-
ample, become necessary with regard to the control voltage for binary inputs or the
termination of bus-capable interfaces. Follow the procedure described in this section,
whenever hardware modifications are done.
Auxiliary Voltage There are different ranges of input voltage for the auxiliary voltage (refer to the Order-
ing Information in Appendix A.1). The power supplies of the variants for
60/110/125 VDC and 110/125/220/250 VDC, 115 VAC are largely interchangeable by
modifying the position of the jumpers. The assignment of these jumpers to the nominal
voltage ranges and the spatial layout on the PCB are described further below at “Pro-
cessor Board C-I/O-1 and C-I/O-10”. When the device is delivered, these jumpers are
set according to the name-plate sticker. Generally, they do not need to be altered.
Life 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
I
BI (HIGH)
1.8 mA (SIPROTEC
®
4 7SA522)
U
BImin
19 V for delivery setting for nominal voltages of 24/48/60 V (from the
7SA522);
88 V for delivery setting for nominal voltages of 110/125/220/250 V (from
7SA522);
176 V for delivery setting for nominal voltages of 220/250 V (from the
7SA522)
U
CTR
110 V (system / trip circuit)
R
TC
500 Ω (system / trip circuit)
U
TC (LOW)
2 V (system / trip circuit)
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