ABB REF 610 Technical Reference Manual page 57

1MRS755310
Feeder Protection Relay
Technical Reference Manual
Switchgroups and parameter masks
The settings can be altered and the functions of the relay selected in the SG_ selector
switchgroups. The switchgroups are software based and thus not physical switches
to be found in the hardware of the relay.
A checksum is used for verifying that the switches have been properly set. The
Fig. 5.1.4.10.-1 shows an example of manual checksum calculation.
Switch Position
number
1 1
2 0
3 1
4 0
1
5
0
6
1
7
8 0
9 1
0
10
11 1
12
0
13
1
14
0
15
1
16
0
17 1
18 0
1
19
20 0
21 1
22 0
1
23
checksum
Fig. 5.1.4.10.-1 Example of calculating the checksum of a SG_ selector switchgroup
When the checksum, calculated according to the example above, equals the
checksum of the switchgroup, the switches in the switchgroup are properly set.
The factory default settings of the switches and the corresponding checksums are
presented in the following tables.
SGF1...SGF5
Switchgroups SGF1...SGF5 are used for configuring the wanted function as
follows:
Weighting
factor
x
1
=
x
2 =
x
=
4
x
=
8
x
=
16
x
32 =
x =
64
=
x
128
=
x
256
=
x
512
x =
1024
x
=
2048
4096
x
=
x
8192 =
=
x 16384
x =
32768
x
=
65536
x
131072 =
x 262144
=
x =
524288
x =
1048576
x =
2097152
x =
4194304
=
S
SG_
REF 610 REF 610
Value
1
0
4
0
16
0
64
0
256
0
1024
0
4096
0
4096
0
16384
0
65536
0
262144
0
1048576
0
4194304
5505024
A051892
57