ABB REU 523 Technical Reference Manual page 22

REU 523
22
Combined Overvoltage and Undervoltage Relay
Technical Reference Manual
Switch Position
No
1 1
2 0
3 1
4 0
5 1
6 0
7 1
8 0
Checksum
)LJ  $Q H[DPSOH RI FDOFXODWLQJ WKH FKHFNVXP RI D 6*B VHOHFWRU
VZLWFKJURXS
When the checksum, calculated according to the example above, equals the
checksum of the relay, the switches in the switchgroup have been properly set.
The factory default settings of the switches and the corresponding checksums are
presented in the tables below.
Weighting
factor
x 1 =
x 2 =
x 4 =
x 8 =
x 16 =
x 32 =
x 64 =
x 128 =
∑
=
SG_
1MRS 750942-MUM
Value
1
0
4
0
16
0
64
0
85